Flexible array members have some restrictions (must be last in a structure, not in a union) and a number of dangerous or non-sensical usage (in an array, in nested structure or even using sizeof() on the containing structure). Sparse currently supports flexible array members but barely and doesn't help finding bugs related to them. This series aims at improving this: * fix structure alignment in the presence of a flexible array member * issue an error if the flexible array is not last or in a union * add an option to issue a warning: * on arrays of such 'flexible structures' * when using sizeof() on the containing structure * when declaring nested aggregate types with a flexible array member * if the flexible array adds some padding to the structure When used on the kernel (v5.9-rc1) this results in no errors but the following number of warnings: 90 array of flexible structures 5719 using sizeof on a flexible structure 1909 flexible array member has padding 888 nested flexible arrays So, to begin with, the corresponding warning flags default to -Wflexible-array-array -Wno-flexible-array-nested -Wno-flexible-array-padding -Wno-flexible-array-sizeof Notes: implicit sizeof() on such 'flexible structures' like here under are not yet checked: struct s { ... int flex[]; } *dst, *src; ... *dst = *src Luc Van Oostenryck (13): flex-array: add testcases flex-array: factor out common part of lay_out_{struct,union}() flex-array: do not lay out invalid struct members flex-array: flexible array members have zero size and alignment is OK flex-array: detect structures with a flexible array member flex-array: warn on flexible arrays in unions flex-array: warn if flexible array is not last flex-array: identify structures with a flexible array member flex-array: add helper has_flexible_array() flex-array: warn when using sizeof() on a flexible array flex-array: warn an arrays containing a flexible array flex-array: warn on flexible array in nested aggregate types flex-array: warn when a flexible array member has some padding evaluate.c | 3 ++ options.c | 8 ++++++ options.h | 4 +++ sparse.1 | 27 ++++++++++++++++++ symbol.c | 50 +++++++++++++++++++++------------ symbol.h | 8 ++++++ validation/flex-array-align.c | 18 ++++++++++++ validation/flex-array-array.c | 15 ++++++++++ validation/flex-array-error.c | 26 +++++++++++++++++ validation/flex-array-nested.c | 29 +++++++++++++++++++ validation/flex-array-padding.c | 21 ++++++++++++++ validation/flex-array-sizeof.c | 18 ++++++++++++ 12 files changed, 209 insertions(+), 18 deletions(-) create mode 100644 validation/flex-array-align.c create mode 100644 validation/flex-array-array.c create mode 100644 validation/flex-array-error.c create mode 100644 validation/flex-array-nested.c create mode 100644 validation/flex-array-padding.c create mode 100644 validation/flex-array-sizeof.c -- 2.28.0
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- validation/flex-array-align.c | 19 +++++++++++++++++++ validation/flex-array-array.c | 16 ++++++++++++++++ validation/flex-array-error.c | 27 +++++++++++++++++++++++++++ validation/flex-array-nested.c | 30 ++++++++++++++++++++++++++++++ validation/flex-array-padding.c | 22 ++++++++++++++++++++++ validation/flex-array-sizeof.c | 19 +++++++++++++++++++ 6 files changed, 133 insertions(+) create mode 100644 validation/flex-array-align.c create mode 100644 validation/flex-array-array.c create mode 100644 validation/flex-array-error.c create mode 100644 validation/flex-array-nested.c create mode 100644 validation/flex-array-padding.c create mode 100644 validation/flex-array-sizeof.c diff --git a/validation/flex-array-align.c b/validation/flex-array-align.c new file mode 100644 index 000000000000..0cc67ab36997 --- /dev/null +++ b/validation/flex-array-align.c @@ -0,0 +1,19 @@ +struct s { + __INT32_TYPE__ x; + __INT16_TYPE__ y; + unsigned char f[]; +}; + +static int foo(struct s *s) +{ + return (sizeof(*s) << 16) | __builtin_offsetof(typeof(*s), f); +} + +/* + * check-name: flex-array-align + * check-command: test-linearize -Wno-flexible-array-sizeof $file + * check-known-to-fail + * + * check-output-ignore + * check-output-contains: ret\\..*\\$0x80006 + */ diff --git a/validation/flex-array-array.c b/validation/flex-array-array.c new file mode 100644 index 000000000000..bda80d7a0a20 --- /dev/null +++ b/validation/flex-array-array.c @@ -0,0 +1,16 @@ +struct s { + int i; + long f[]; +}; + +static struct s a[2]; + +/* + * check-name: flex-array-array + * check-command: sparse -Wflexible-array-array $file + * check-known-to-fail + * + * check-error-start +flex-array-array.c:6:18: warning: array of flexible structures + * check-error-end + */ diff --git a/validation/flex-array-error.c b/validation/flex-array-error.c new file mode 100644 index 000000000000..89601e42daf6 --- /dev/null +++ b/validation/flex-array-error.c @@ -0,0 +1,27 @@ +struct s { + int i; + long f[]; + int j; +}; + +union u { + int i; + long f[]; +}; + +// trigger the examination of the offending types +static int foo(struct s *s, union u *u) +{ + return __builtin_offsetof(typeof(*s), i) + + __builtin_offsetof(typeof(*u), i); +} + +/* + * check-name: flex-array-error + * check-known-to-fail + * + * check-error-start +flex-array-error.c:3:14: error: flexible array member 'f' is not last +flex-array-error.c:9:14: error: flexible array member 'f' in a union + * check-error-end + */ diff --git a/validation/flex-array-nested.c b/validation/flex-array-nested.c new file mode 100644 index 000000000000..3503c329d7c3 --- /dev/null +++ b/validation/flex-array-nested.c @@ -0,0 +1,30 @@ +struct f { + int i; + long f[]; +}; + +struct s { + struct f f; +}; + +union u { + struct f f; +}; + +// trigger the examination of the offending types +static int foo(struct s *s, union u *u) +{ + return __builtin_offsetof(typeof(*s), f) + + __builtin_offsetof(typeof(*u), f); +} + +/* + * check-name: flex-array-nested + * check-command: sparse -Wflexible-array-nested $file + * check-known-to-fail + * + * check-error-start +flex-array-nested.c:6:8: warning: nested flexible arrays +flex-array-nested.c:10:7: warning: nested flexible arrays + * check-error-end + */ diff --git a/validation/flex-array-padding.c b/validation/flex-array-padding.c new file mode 100644 index 000000000000..2ba77971266e --- /dev/null +++ b/validation/flex-array-padding.c @@ -0,0 +1,22 @@ +struct s { + __INT32_TYPE__ x; + __INT16_TYPE__ y; + unsigned char f[]; +}; + +static int foo(struct s *s) +{ + return __builtin_offsetof(typeof(*s), f); +} + +/* + * check-name: flex-array-padding + * check-command: test-linearize -Wflexible-array-padding $file + * check-known-to-fail + * + * check-output-ignore + * + * check-error-start +flex-array-padding.c:4:23: warning: flexible array member has padding + * check-error-end + */ diff --git a/validation/flex-array-sizeof.c b/validation/flex-array-sizeof.c new file mode 100644 index 000000000000..3359509d0084 --- /dev/null +++ b/validation/flex-array-sizeof.c @@ -0,0 +1,19 @@ +struct s { + int i; + long f[]; +}; + +static int foo(struct s *s) +{ + return sizeof(*s); +} + +/* + * check-name: flex-array-sizeof + * check-command: sparse -Wflexible-array-sizeof $file + * check-known-to-fail + * + * check-error-start +flex-array-sizeof.c:8:16: warning: using sizeof on a flexible structure + * check-error-end + */ -- 2.28.0
This is a preparatory step for later patches. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 24 ++++++++---------------- 1 file changed, 8 insertions(+), 16 deletions(-) diff --git a/symbol.c b/symbol.c index 7f0c85580f06..365351a0a756 100644 --- a/symbol.c +++ b/symbol.c @@ -94,14 +94,6 @@ struct struct_union_info { */ static void lay_out_union(struct symbol *sym, struct struct_union_info *info) { - examine_symbol_type(sym); - - // Unnamed bitfields do not affect alignment. - if (sym->ident || !is_bitfield_type(sym)) { - if (sym->ctype.alignment > info->max_align) - info->max_align = sym->ctype.alignment; - } - if (sym->bit_size > info->bit_size) info->bit_size = sym->bit_size; @@ -125,14 +117,6 @@ static void lay_out_struct(struct symbol *sym, struct struct_union_info *info) unsigned long bit_size, align_bit_mask; int base_size; - examine_symbol_type(sym); - - // Unnamed bitfields do not affect alignment. - if (sym->ident || !is_bitfield_type(sym)) { - if (sym->ctype.alignment > info->max_align) - info->max_align = sym->ctype.alignment; - } - bit_size = info->bit_size; base_size = sym->bit_size; @@ -196,6 +180,14 @@ static struct symbol * examine_struct_union_type(struct symbol *sym, int advance sparse_error(member->pos, "member '%s' has __auto_type", show_ident(member->ident)); member->ctype.base_type = &incomplete_ctype; } + examine_symbol_type(member); + + if (member->ctype.alignment > info.max_align) { + // Unnamed bitfields do not affect alignment. + if (member->ident || !is_bitfield_type(member)) + info.max_align = member->ctype.alignment; + } + fn(member, &info); } END_FOR_EACH_PTR(member); -- 2.28.0
Do not bother trying to lay out invalid struct members, ignore them as it will avoid to special case them later. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/symbol.c b/symbol.c index 365351a0a756..4c93a0fb4880 100644 --- a/symbol.c +++ b/symbol.c @@ -121,10 +121,12 @@ static void lay_out_struct(struct symbol *sym, struct struct_union_info *info) base_size = sym->bit_size; /* - * Unsized arrays cause us to not align the resulting - * structure size + * If the member is unsized, either it's a flexible array or + * it's invalid and a warning has already been issued. */ if (base_size < 0) { + if (!is_array_type(sym)) + return; info->align_size = 0; base_size = 0; } -- 2.28.0
When doing the layout of structures, flexible arrays used to not align the resulting structure size. However, the standard specify that while for most purposes flexible arrays can be handled as if not present, they still may add some trailing padding (cfr. C11's 6.7.2.1p18). So, there is no reason to reset the alignment. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 1 - validation/flex-array-align.c | 1 - 2 files changed, 2 deletions(-) diff --git a/symbol.c b/symbol.c index 4c93a0fb4880..9acffeea7fad 100644 --- a/symbol.c +++ b/symbol.c @@ -127,7 +127,6 @@ static void lay_out_struct(struct symbol *sym, struct struct_union_info *info) if (base_size < 0) { if (!is_array_type(sym)) return; - info->align_size = 0; base_size = 0; } diff --git a/validation/flex-array-align.c b/validation/flex-array-align.c index 0cc67ab36997..9f28942a1ee1 100644 --- a/validation/flex-array-align.c +++ b/validation/flex-array-align.c @@ -12,7 +12,6 @@ static int foo(struct s *s) /* * check-name: flex-array-align * check-command: test-linearize -Wno-flexible-array-sizeof $file - * check-known-to-fail * * check-output-ignore * check-output-contains: ret\\..*\\$0x80006 -- 2.28.0
This is a preparatory step for doing the checks and warnings. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/symbol.c b/symbol.c index 9acffeea7fad..6633e89de4a9 100644 --- a/symbol.c +++ b/symbol.c @@ -87,6 +87,7 @@ struct struct_union_info { unsigned long max_align; unsigned long bit_size; int align_size; + struct symbol *flex_array; }; /* @@ -128,6 +129,7 @@ static void lay_out_struct(struct symbol *sym, struct struct_union_info *info) if (!is_array_type(sym)) return; base_size = 0; + info->flex_array = sym; } align_bit_mask = bytes_to_bits(sym->ctype.alignment) - 1; -- 2.28.0
Flexible array members are not allowed in unions. So, warn if one is present. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/symbol.c b/symbol.c index 6633e89de4a9..e578b1a840a3 100644 --- a/symbol.c +++ b/symbol.c @@ -95,6 +95,9 @@ struct struct_union_info { */ static void lay_out_union(struct symbol *sym, struct struct_union_info *info) { + if (sym->bit_size < 0 && is_array_type(sym)) + sparse_error(sym->pos, "flexible array member '%s' in a union", show_ident(sym->ident)); + if (sym->bit_size > info->bit_size) info->bit_size = sym->bit_size; -- 2.28.0
Flexible array members must be the last in a structure. Warn if it is not the case. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 2 ++ validation/flex-array-error.c | 1 - 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/symbol.c b/symbol.c index e578b1a840a3..b4c5e471372b 100644 --- a/symbol.c +++ b/symbol.c @@ -186,6 +186,8 @@ static struct symbol * examine_struct_union_type(struct symbol *sym, int advance sparse_error(member->pos, "member '%s' has __auto_type", show_ident(member->ident)); member->ctype.base_type = &incomplete_ctype; } + if (info.flex_array) + sparse_error(info.flex_array->pos, "flexible array member '%s' is not last", show_ident(info.flex_array->ident)); examine_symbol_type(member); if (member->ctype.alignment > info.max_align) { diff --git a/validation/flex-array-error.c b/validation/flex-array-error.c index 89601e42daf6..2b7e6953050c 100644 --- a/validation/flex-array-error.c +++ b/validation/flex-array-error.c @@ -18,7 +18,6 @@ static int foo(struct s *s, union u *u) /* * check-name: flex-array-error - * check-known-to-fail * * check-error-start flex-array-error.c:3:14: error: flexible array member 'f' is not last -- 2.28.0
Structures containing a flexible array must not be nested. So, as a preparatory step, detect structures or union containing a flexible array, possibly recursively and mark the corresponding type with a dedicated flag. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.c | 6 ++++++ symbol.h | 1 + 2 files changed, 7 insertions(+) diff --git a/symbol.c b/symbol.c index b4c5e471372b..bffdc135ba69 100644 --- a/symbol.c +++ b/symbol.c @@ -87,6 +87,7 @@ struct struct_union_info { unsigned long max_align; unsigned long bit_size; int align_size; + char has_flex_array; struct symbol *flex_array; }; @@ -206,6 +207,11 @@ static struct symbol * examine_struct_union_type(struct symbol *sym, int advance bit_align = bytes_to_bits(sym->ctype.alignment)-1; bit_size = (bit_size + bit_align) & ~bit_align; } + if (info.flex_array) { + info.has_flex_array = 1; + } + if (info.has_flex_array) + sym->has_flex_array = 1; sym->bit_size = bit_size; return sym; } diff --git a/symbol.h b/symbol.h index a3ed95678ee5..287df0a3a0ee 100644 --- a/symbol.h +++ b/symbol.h @@ -185,6 +185,7 @@ struct symbol { examined:1, expanding:1, evaluated:1, + has_flex_array:1, string:1, designated_init:1, forced_arg:1, -- 2.28.0
This will make later checks easier & clearer. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- symbol.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/symbol.h b/symbol.h index 287df0a3a0ee..c9e6c7fe4439 100644 --- a/symbol.h +++ b/symbol.h @@ -507,6 +507,13 @@ static inline int is_extern_inline(struct symbol *sym) is_function(sym->ctype.base_type); } +static inline int has_flexible_array(struct symbol *type) +{ + if (type->type == SYM_NODE) + type = type->ctype.base_type; + return type->has_flex_array; +} + static inline int get_sym_type(struct symbol *type) { if (type->type == SYM_NODE) -- 2.28.0
Using sizeof() on a structure containing a flexible array will ignore the 'flexible' part. This is maybe what is expected but maybe not, so add an option -Wflexible-array-sizeof to warn on such usage. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- evaluate.c | 3 +++ options.c | 2 ++ options.h | 1 + sparse.1 | 7 +++++++ validation/flex-array-sizeof.c | 1 - 5 files changed, 13 insertions(+), 1 deletion(-) diff --git a/evaluate.c b/evaluate.c index c1ef348a475e..cfbb6ada4153 100644 --- a/evaluate.c +++ b/evaluate.c @@ -2253,6 +2253,9 @@ static struct symbol *evaluate_sizeof(struct expression *expr) size = bits_in_char; } + if (has_flexible_array(type) && Wflexible_array_sizeof) + warning(expr->pos, "using sizeof on a flexible structure"); + if (is_array_type(type) && size < 0) { // VLA, 1-dimension only struct expression *base, *size; struct symbol *base_type; diff --git a/options.c b/options.c index 294dfd3be77a..ce88fbf6ed61 100644 --- a/options.c +++ b/options.c @@ -100,6 +100,7 @@ int Wdesignated_init = 1; int Wdo_while = 0; int Wenum_mismatch = 1; int Wexternal_function_has_definition = 1; +int Wflexible_array_sizeof = 0; int Wimplicit_int = 1; int Winit_cstring = 0; int Wint_to_pointer_cast = 1; @@ -840,6 +841,7 @@ static const struct flag warnings[] = { { "do-while", &Wdo_while }, { "enum-mismatch", &Wenum_mismatch }, { "external-function-has-definition", &Wexternal_function_has_definition }, + { "flexible-array-sizeof", &Wflexible_array_sizeof }, { "implicit-int", &Wimplicit_int }, { "init-cstring", &Winit_cstring }, { "int-to-pointer-cast", &Wint_to_pointer_cast }, diff --git a/options.h b/options.h index abdf08645ad2..feb351a36c9e 100644 --- a/options.h +++ b/options.h @@ -99,6 +99,7 @@ extern int Wdesignated_init; extern int Wdo_while; extern int Wenum_mismatch; extern int Wexternal_function_has_definition; +extern int Wflexible_array_sizeof; extern int Wimplicit_int; extern int Winit_cstring; extern int Wint_to_pointer_cast; diff --git a/sparse.1 b/sparse.1 index 48dab7a9a5c1..5f98df33a231 100644 --- a/sparse.1 +++ b/sparse.1 @@ -257,6 +257,13 @@ Sparse issues these warnings by default. To turn them off, use \fB\-Wno\-external\-function\-has\-definition\fR. . .TP +.B -Wflexible-array-sizeof +Warn about using the sizeof operator on a structure containing a flexible array, +possibly recursively. + +Sparse does not issue these warnings by default. +. +.TP .B \-Winit\-cstring Warn about initialization of a char array with a too long constant C string. diff --git a/validation/flex-array-sizeof.c b/validation/flex-array-sizeof.c index 3359509d0084..05394e19a6b2 100644 --- a/validation/flex-array-sizeof.c +++ b/validation/flex-array-sizeof.c @@ -11,7 +11,6 @@ static int foo(struct s *s) /* * check-name: flex-array-sizeof * check-command: sparse -Wflexible-array-sizeof $file - * check-known-to-fail * * check-error-start flex-array-sizeof.c:8:16: warning: using sizeof on a flexible structure -- 2.28.0
An array of some aggregate type containing, possibly recursively, a flexible array is pretty non-sensical. So, add an option -Wflexible-array-array to warn on such usage. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- options.c | 2 ++ options.h | 1 + sparse.1 | 7 +++++++ symbol.c | 2 ++ validation/flex-array-array.c | 1 - 5 files changed, 12 insertions(+), 1 deletion(-) diff --git a/options.c b/options.c index ce88fbf6ed61..a8129ac1e952 100644 --- a/options.c +++ b/options.c @@ -100,6 +100,7 @@ int Wdesignated_init = 1; int Wdo_while = 0; int Wenum_mismatch = 1; int Wexternal_function_has_definition = 1; +int Wflexible_array_array = 1; int Wflexible_array_sizeof = 0; int Wimplicit_int = 1; int Winit_cstring = 0; @@ -841,6 +842,7 @@ static const struct flag warnings[] = { { "do-while", &Wdo_while }, { "enum-mismatch", &Wenum_mismatch }, { "external-function-has-definition", &Wexternal_function_has_definition }, + { "flexible-array-array", &Wflexible_array_array }, { "flexible-array-sizeof", &Wflexible_array_sizeof }, { "implicit-int", &Wimplicit_int }, { "init-cstring", &Winit_cstring }, diff --git a/options.h b/options.h index feb351a36c9e..7bcf925b6912 100644 --- a/options.h +++ b/options.h @@ -99,6 +99,7 @@ extern int Wdesignated_init; extern int Wdo_while; extern int Wenum_mismatch; extern int Wexternal_function_has_definition; +extern int Wflexible_array_array; extern int Wflexible_array_sizeof; extern int Wimplicit_int; extern int Winit_cstring; diff --git a/sparse.1 b/sparse.1 index 5f98df33a231..c1a74153c618 100644 --- a/sparse.1 +++ b/sparse.1 @@ -257,6 +257,13 @@ Sparse issues these warnings by default. To turn them off, use \fB\-Wno\-external\-function\-has\-definition\fR. . .TP +.B -Wflexible-array-array +Warn about arrays of structures containing a flexible array. + +Sparse issues these warnings by default. To turn them off, use +\fB-Wno-flexible-array-array\fR. +. +.TP .B -Wflexible-array-sizeof Warn about using the sizeof operator on a structure containing a flexible array, possibly recursively. diff --git a/symbol.c b/symbol.c index bffdc135ba69..02b9066e966a 100644 --- a/symbol.c +++ b/symbol.c @@ -267,6 +267,8 @@ static struct symbol * examine_array_type(struct symbol *sym) bit_size = -1; } } + if (has_flexible_array(base_type) && Wflexible_array_array) + warning(sym->pos, "array of flexible structures"); alignment = base_type->ctype.alignment; if (!sym->ctype.alignment) sym->ctype.alignment = alignment; diff --git a/validation/flex-array-array.c b/validation/flex-array-array.c index bda80d7a0a20..921a0698bb28 100644 --- a/validation/flex-array-array.c +++ b/validation/flex-array-array.c @@ -8,7 +8,6 @@ static struct s a[2]; /* * check-name: flex-array-array * check-command: sparse -Wflexible-array-array $file - * check-known-to-fail * * check-error-start flex-array-array.c:6:18: warning: array of flexible structures -- 2.28.0
A structure or a union containing another aggregate type containing, possibly recursively, a flexible array is quite error prone and make not much sense. So, add an option -Wflexible-array-nested to warn on such usage. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- options.c | 2 ++ options.h | 1 + sparse.1 | 7 +++++++ symbol.c | 4 ++++ validation/flex-array-nested.c | 1 - 5 files changed, 14 insertions(+), 1 deletion(-) diff --git a/options.c b/options.c index a8129ac1e952..b46900b973a6 100644 --- a/options.c +++ b/options.c @@ -101,6 +101,7 @@ int Wdo_while = 0; int Wenum_mismatch = 1; int Wexternal_function_has_definition = 1; int Wflexible_array_array = 1; +int Wflexible_array_nested = 0; int Wflexible_array_sizeof = 0; int Wimplicit_int = 1; int Winit_cstring = 0; @@ -843,6 +844,7 @@ static const struct flag warnings[] = { { "enum-mismatch", &Wenum_mismatch }, { "external-function-has-definition", &Wexternal_function_has_definition }, { "flexible-array-array", &Wflexible_array_array }, + { "flexible-array-nested", &Wflexible_array_nested }, { "flexible-array-sizeof", &Wflexible_array_sizeof }, { "implicit-int", &Wimplicit_int }, { "init-cstring", &Winit_cstring }, diff --git a/options.h b/options.h index 7bcf925b6912..d23ed472eaac 100644 --- a/options.h +++ b/options.h @@ -100,6 +100,7 @@ extern int Wdo_while; extern int Wenum_mismatch; extern int Wexternal_function_has_definition; extern int Wflexible_array_array; +extern int Wflexible_array_nested; extern int Wflexible_array_sizeof; extern int Wimplicit_int; extern int Winit_cstring; diff --git a/sparse.1 b/sparse.1 index c1a74153c618..9b1a59c6b9d4 100644 --- a/sparse.1 +++ b/sparse.1 @@ -264,6 +264,13 @@ Sparse issues these warnings by default. To turn them off, use \fB-Wno-flexible-array-array\fR. . .TP +.B -Wflexible-array-nested +Warn about structures containing a flexible array being contained into +another structure, union or array. + +Sparse does not issue these warnings by default. +. +.TP .B -Wflexible-array-sizeof Warn about using the sizeof operator on a structure containing a flexible array, possibly recursively. diff --git a/symbol.c b/symbol.c index 02b9066e966a..a9f646eb053f 100644 --- a/symbol.c +++ b/symbol.c @@ -197,6 +197,10 @@ static struct symbol * examine_struct_union_type(struct symbol *sym, int advance info.max_align = member->ctype.alignment; } + if (has_flexible_array(member)) + info.has_flex_array = 1; + if (has_flexible_array(member) && Wflexible_array_nested) + warning(sym->pos, "nested flexible arrays"); fn(member, &info); } END_FOR_EACH_PTR(member); diff --git a/validation/flex-array-nested.c b/validation/flex-array-nested.c index 3503c329d7c3..63767683c56a 100644 --- a/validation/flex-array-nested.c +++ b/validation/flex-array-nested.c @@ -21,7 +21,6 @@ static int foo(struct s *s, union u *u) /* * check-name: flex-array-nested * check-command: sparse -Wflexible-array-nested $file - * check-known-to-fail * * check-error-start flex-array-nested.c:6:8: warning: nested flexible arrays -- 2.28.0
If some padding is added because of the presence of a flexible array member, the size of the structure will be greater than the offset of this flexible array which can cause some problems if the assumption is made that these 2 size must be identical (which is easy to do since such flexible arrays are conceptually 'after' the structure itself). Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com> --- options.c | 2 ++ options.h | 1 + sparse.1 | 6 ++++++ symbol.c | 2 ++ validation/flex-array-padding.c | 1 - 5 files changed, 11 insertions(+), 1 deletion(-) diff --git a/options.c b/options.c index b46900b973a6..92d64e6ab64e 100644 --- a/options.c +++ b/options.c @@ -102,6 +102,7 @@ int Wenum_mismatch = 1; int Wexternal_function_has_definition = 1; int Wflexible_array_array = 1; int Wflexible_array_nested = 0; +int Wflexible_array_padding = 0; int Wflexible_array_sizeof = 0; int Wimplicit_int = 1; int Winit_cstring = 0; @@ -845,6 +846,7 @@ static const struct flag warnings[] = { { "external-function-has-definition", &Wexternal_function_has_definition }, { "flexible-array-array", &Wflexible_array_array }, { "flexible-array-nested", &Wflexible_array_nested }, + { "flexible-array-padding", &Wflexible_array_padding }, { "flexible-array-sizeof", &Wflexible_array_sizeof }, { "implicit-int", &Wimplicit_int }, { "init-cstring", &Winit_cstring }, diff --git a/options.h b/options.h index d23ed472eaac..31d9c5859977 100644 --- a/options.h +++ b/options.h @@ -101,6 +101,7 @@ extern int Wenum_mismatch; extern int Wexternal_function_has_definition; extern int Wflexible_array_array; extern int Wflexible_array_nested; +extern int Wflexible_array_padding; extern int Wflexible_array_sizeof; extern int Wimplicit_int; extern int Winit_cstring; diff --git a/sparse.1 b/sparse.1 index 9b1a59c6b9d4..8c61e869dc57 100644 --- a/sparse.1 +++ b/sparse.1 @@ -268,6 +268,12 @@ Sparse issues these warnings by default. To turn them off, use Warn about structures containing a flexible array being contained into another structure, union or array. +Sparse does not issue these warnings by default. +. +.TP +.B -Wflexible-array-padding +Warn about padding alignments caused by the presence of a flexible array member. + Sparse does not issue these warnings by default. . .TP diff --git a/symbol.c b/symbol.c index a9f646eb053f..eabb2226651f 100644 --- a/symbol.c +++ b/symbol.c @@ -213,6 +213,8 @@ static struct symbol * examine_struct_union_type(struct symbol *sym, int advance } if (info.flex_array) { info.has_flex_array = 1; + if (sym->offset != bits_to_bytes(bit_size) && Wflexible_array_padding) + warning(info.flex_array->pos, "flexible array member has padding"); } if (info.has_flex_array) sym->has_flex_array = 1; diff --git a/validation/flex-array-padding.c b/validation/flex-array-padding.c index 2ba77971266e..95b349e1199a 100644 --- a/validation/flex-array-padding.c +++ b/validation/flex-array-padding.c @@ -12,7 +12,6 @@ static int foo(struct s *s) /* * check-name: flex-array-padding * check-command: test-linearize -Wflexible-array-padding $file - * check-known-to-fail * * check-output-ignore * -- 2.28.0
On Wed, Sep 30, 2020 at 4:18 PM Luc Van Oostenryck
<luc.vanoostenryck@gmail.com> wrote:
>
> If some padding is added because of the presence of a flexible
> array member, the size of the structure will be greater than
> the offset of this flexible array which can cause some
> problems if the assumption is made that these 2 size must be
> identical (which is easy to do since such flexible arrays are
> conceptually 'after' the structure itself).
The warning seems pointless, and the explanation above is wrong.
Flexible array padding is normal and good. IOW, if you have
struct odd_struct {
char c;
unsigned int flex[];
};
then the flexible array - and the structure - very much should be
aligned on 'unsigned int', and both the offset of the flex-array and
the (bogus) size of the structure is 4.
So this is a normal case and nothing wrong with it, and the above is
the "flexible array caused padding" one (but sizeof and offsetof
match).
And the case that causes sizeof() and offsetof() to not match is
normal too: but is not that the flexible array member caused padding,
but that *other* members did.
IOW, maybe you have a structure like this:
struct other {
uint64_t a;
uint32_t b;
char flex[];
};
and now "offsetof(flex)" is 12, but "sizeof(struct other)" is 16,
because the flex-array itself has no real alignment requirement and
will just be laid out after the 12 bytes of a/b, but the structure has
8-byte alignment due to 'a'.
So I don't think the warning is interesting, because this is a
perfectly normal condition too.
And I don't think your explanation for the warning makes sense,
because you say "padding is added because of the presence of a
flexible array member", but that's not at all what is going on. The
padding is added because of *other* members.
Anyway, the above is just an example of why "sizeof()" itself makes no
sense on these things. A "sizeof()" of a structure with a flexible
array member is inherently pointless. You can't use it for anything
really valid, and it doesn't have any sensible meaning.
But I don't think that has anything to do with warning about padding.
The padding is right - it's the sizeof() itself that is nonsensical.
So in the kernel, we would
- start warning about 'sizeof(flex_struct)'
- make our "struct_size(s, m, N)" construct use
"offsetof(m)+N*sizeof(*m)" instead of using sizeof().
Of course, it may well be that we end up with trouble just because we
end up _needing_ sizeof() for some reason. I can't think of any sane
situation off the top of my head, but who knows what odd macros etc we
might have that end up doing sizeof() as part of things..
Linus
On Wed, Sep 30, 2020 at 4:18 PM Luc Van Oostenryck
<luc.vanoostenryck@gmail.com> wrote:
>
> Flexible array members have some restrictions (must be last
> in a structure, not in a union) and a number of dangerous or
> non-sensical usage (in an array, in nested structure or even
> using sizeof() on the containing structure).
Thanks, this looks good apart from the one patch I reacted to. Maybe
you had some other reason for that patch, and it's just the commit
message that needs fixing, but as it is now I think that patch didn't
make much sense..
Linus
On Thu, Oct 01, 2020 at 09:34:37AM -0700, Linus Torvalds wrote: > On Wed, Sep 30, 2020 at 4:18 PM Luc Van Oostenryck > <luc.vanoostenryck@gmail.com> wrote: > > > > If some padding is added because of the presence of a flexible > > array member, the size of the structure will be greater than > > the offset of this flexible array which can cause some > > problems if the assumption is made that these 2 size must be > > identical (which is easy to do since such flexible arrays are > > conceptually 'after' the structure itself). > > The warning seems pointless, and the explanation above is wrong. > > Flexible array padding is normal and good. IOW, if you have > > struct odd_struct { > char c; > unsigned int flex[]; > }; > > then the flexible array - and the structure - very much should be > aligned on 'unsigned int', and both the offset of the flex-array and > the (bogus) size of the structure is 4. > > So this is a normal case and nothing wrong with it, and the above is > the "flexible array caused padding" one (but sizeof and offsetof > match). > > And the case that causes sizeof() and offsetof() to not match is > normal too: but is not that the flexible array member caused padding, > but that *other* members did. > > IOW, maybe you have a structure like this: > > struct other { > uint64_t a; > uint32_t b; > char flex[]; > }; > > and now "offsetof(flex)" is 12, but "sizeof(struct other)" is 16, > because the flex-array itself has no real alignment requirement and > will just be laid out after the 12 bytes of a/b, but the structure has > 8-byte alignment due to 'a'. > > So I don't think the warning is interesting, because this is a > perfectly normal condition too. > > And I don't think your explanation for the warning makes sense, > because you say "padding is added because of the presence of a > flexible array member", but that's not at all what is going on. The > padding is added because of *other* members. Yes, my explanation is completely wrong. The warning is indeed just about sizeof() != offset() and I added because it seemed odd to me but ... > Anyway, the above is just an example of why "sizeof()" itself makes no > sense on these things. A "sizeof()" of a structure with a flexible > array member is inherently pointless. You can't use it for anything > really valid, and it doesn't have any sensible meaning. > > But I don't think that has anything to do with warning about padding. > The padding is right - it's the sizeof() itself that is nonsensical. Yes, indeed, it's perfectly normal. I'll drop this patch. > So in the kernel, we would > > - start warning about 'sizeof(flex_struct)' Adding this warning by default annoys me slightly because it will add 5700+ warnings to the 18000 already present and I think sparse is already underused because it is very/too noisy. But I guess that most occurrences come from a few macros and thus should be easy to get rid off. > - make our "struct_size(s, m, N)" construct use > "offsetof(m)+N*sizeof(*m)" instead of using sizeof(). This accounts for only 432 occurences of sizeof(flex-array), leaving 5287 other ones. > Of course, it may well be that we end up with trouble just because we > end up _needing_ sizeof() for some reason. I can't think of any sane > situation off the top of my head, but who knows what odd macros etc we > might have that end up doing sizeof() as part of things.. Well, yes, for my part, I find the number of nested flexible arrays a bit worrying and much less sensical than the sizeof but .. live and see. -- Luc
On Thu, Oct 1, 2020 at 12:17 PM Luc Van Oostenryck
<luc.vanoostenryck@gmail.com> wrote:
>
> > So in the kernel, we would
> >
> > - start warning about 'sizeof(flex_struct)'
>
> Adding this warning by default annoys me slightly because it will
> add 5700+ warnings to the 18000 already present and I think sparse
> is already underused because it is very/too noisy. But I guess that
> most occurrences come from a few macros and thus should be easy to
> get rid off.
Hopefully. I'll try to take a look. Do you have the sparse changes in
a git branch already so that I can just try that directly?
Or if you send me a couple of examples, maybe it's just the same
pattern over and over,..
Linus
[-- Attachment #1: Type: text/plain, Size: 1229 bytes --] On Thu, Oct 01, 2020 at 12:27:56PM -0700, Linus Torvalds wrote: > On Thu, Oct 1, 2020 at 12:17 PM Luc Van Oostenryck > <luc.vanoostenryck@gmail.com> wrote: > > > > > So in the kernel, we would > > > > > > - start warning about 'sizeof(flex_struct)' > > > > Adding this warning by default annoys me slightly because it will > > add 5700+ warnings to the 18000 already present and I think sparse > > is already underused because it is very/too noisy. But I guess that > > most occurrences come from a few macros and thus should be easy to > > get rid off. > > Hopefully. I'll try to take a look. Do you have the sparse changes in > a git branch already so that I can just try that directly? What I posted yesterday is on git://git.kernel.org/pub/scm/devel/sparse/sparse-dev.git flex-array > Or if you send me a couple of examples, maybe it's just the same > pattern over and over,.. Well, the 888 occurences I see are already 'unique' occurences (in the sense that the warning is from a distinct file+position). I'm adding in attachment the extract of my test logs (but it is on v5.9-rc1 so it's maybe not much usefull). I ddn't investigated anything, just checked a few case to see that it was a genuine occurrence. -- Luc [-- Attachment #2: nested-flex-array.txt --] [-- Type: text/plain, Size: 71231 bytes --] 268 ./include/net/ip.h:44:8: warning: nested flexible arrays 228 ./include/linux/tty.h:85:8: warning: nested flexible arrays 228 ./include/linux/tty.h:230:8: warning: nested flexible arrays 219 ./include/crypto/hash.h:231:8: warning: nested flexible arrays 141 ./include/linux/ieee80211.h:1119:39: warning: nested flexible arrays 141 ./include/linux/ieee80211.h:1103:31: warning: nested flexible arrays 141 ./include/linux/ieee80211.h:1101:24: warning: nested flexible arrays 141 ./include/linux/ieee80211.h:1047:15: warning: nested flexible arrays 141 ./include/linux/ieee80211.h:1040:8: warning: nested flexible arrays 134 ./include/crypto/skcipher.h:37:8: warning: nested flexible arrays 129 net/mac80211/ieee80211_i.h:871:8: warning: nested flexible arrays 121 net/mac80211/sta_info.h:535:8: warning: nested flexible arrays 102 ./include/crypto/aead.h:152:8: warning: nested flexible arrays 100 fs/ocfs2/ocfs2_fs.h:725:15: warning: nested flexible arrays 88 drivers/net/wireless/marvell/mwifiex/fw.h:2309:15: warning: nested flexible arrays 74 ./include/crypto/hash.h:216:8: warning: nested flexible arrays 63 ./include/net/inet_sock.h:58:8: warning: nested flexible arrays 61 ./include/linux/serial_core.h:285:8: warning: nested flexible arrays 59 net/wireless/core.h:24:8: warning: nested flexible arrays 56 drivers/md/bcache/bcache.h:507:8: warning: nested flexible arrays 56 ./include/linux/console_struct.h:94:8: warning: nested flexible arrays 55 ./include/net/tcp.h:872:23: warning: nested flexible arrays 55 ./include/net/tcp.h:859:15: warning: nested flexible arrays 55 ./include/net/tcp.h:825:8: warning: nested flexible arrays 51 ./include/linux/usb/serial.h:72:8: warning: nested flexible arrays 47 ./include/net/flow_offload.h:377:8: warning: nested flexible arrays 46 ./include/crypto/skcipher.h:43:8: warning: nested flexible arrays 44 ./include/net/xfrm.h:589:15: warning: nested flexible arrays 44 ./include/net/xfrm.h:588:8: warning: nested flexible arrays 42 drivers/md/bcache/bcache.h:231:8: warning: nested flexible arrays 39 ./include/linux/crypto.h:639:8: warning: nested flexible arrays 37 net/mac80211/key.h:59:8: warning: nested flexible arrays 36 fs/ext4/ext4.h:2188:16: warning: nested flexible arrays 36 ./include/rdma/ib_verbs.h:2055:7: warning: nested flexible arrays 36 ./include/crypto/internal/aead.h:21:24: warning: nested flexible arrays 36 ./include/crypto/internal/aead.h:20:15: warning: nested flexible arrays 36 ./include/crypto/internal/aead.h:18:8: warning: nested flexible arrays 35 arch/x86/events/intel/../perf_event.h:199:8: warning: nested flexible arrays 34 net/wireless/core.h:150:8: warning: nested flexible arrays 30 net/mac80211/ieee80211_i.h:836:8: warning: nested flexible arrays 26 drivers/net/wireless/ath/ath10k/htt.h:1811:15: warning: nested flexible arrays 26 ./include/net/xfrm.h:661:8: warning: nested flexible arrays 26 ./include/net/sctp/structs.h:1548:8: warning: nested flexible arrays 26 ./include/linux/sctp.h:275:8: warning: nested flexible arrays 24 net/mac80211/ieee80211_i.h:797:8: warning: nested flexible arrays 24 drivers/md/bcache/journal.h:128:8: warning: nested flexible arrays 24 drivers/md/bcache/bcache.h:407:8: warning: nested flexible arrays 24 ./include/net/mac80211.h:2572:8: warning: nested flexible arrays 24 ./include/linux/hyperv.h:725:8: warning: nested flexible arrays 24 ./include/linux/hyperv.h:685:8: warning: nested flexible arrays 24 ./include/linux/errqueue.h:15:15: warning: nested flexible arrays 24 ./include/linux/errqueue.h:14:8: warning: nested flexible arrays 24 ./include/linux/cgroup-defs.h:494:8: warning: nested flexible arrays 24 ./include/acpi/actypes.h:1156:8: warning: nested flexible arrays 23 ./include/crypto/internal/skcipher.h:22:24: warning: nested flexible arrays 23 ./include/crypto/internal/skcipher.h:21:15: warning: nested flexible arrays 23 ./include/crypto/internal/skcipher.h:19:8: warning: nested flexible arrays 22 drivers/net/wireless/intel/iwlwifi/fw/api/dbg-tlv.h:219:8: warning: nested flexible arrays 21 ./include/crypto/rng.h:54:8: warning: nested flexible arrays 21 ./include/crypto/akcipher.h:48:8: warning: nested flexible arrays 20 fs/ocfs2/ocfs2_fs.h:662:8: warning: nested flexible arrays 20 ./include/net/xfrm.h:607:8: warning: nested flexible arrays 20 ./include/net/inet_sock.h:63:8: warning: nested flexible arrays 19 security/apparmor/include/policy.h:129:8: warning: nested flexible arrays 19 ./include/net/xfrm.h:629:8: warning: nested flexible arrays 18 ./include/crypto/internal/hash.h:46:24: warning: nested flexible arrays 18 ./include/crypto/internal/hash.h:45:15: warning: nested flexible arrays 18 ./include/crypto/internal/hash.h:43:8: warning: nested flexible arrays 16 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h:235:15: warning: nested flexible arrays 16 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.h:232:17: warning: nested flexible arrays 16 drivers/net/ethernet/aquantia/atlantic/aq_hw.h:173:8: warning: nested flexible arrays 16 drivers/md/bcache/bcache.h:298:8: warning: nested flexible arrays 16 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/dbg-tlv.h:219:8: warning: nested flexible arrays 15 ./include/crypto/kpp.h:42:8: warning: nested flexible arrays 14 fs/dlm/dlm_internal.h:518:8: warning: nested flexible arrays 14 drivers/md/bcache/journal.h:119:9: warning: nested flexible arrays 14 drivers/md/bcache/journal.h:104:8: warning: nested flexible arrays 14 drivers/md/bcache/bcache.h:675:9: warning: nested flexible arrays 14 drivers/md/bcache/bcache.h:227:9: warning: nested flexible arrays 14 drivers/md/bcache/bcache.h:225:8: warning: nested flexible arrays 14 ./include/linux/pci.h:297:8: warning: nested flexible arrays 13 ./include/crypto/internal/scompress.h:15:8: warning: nested flexible arrays 12 ./include/net/udp.h:40:15: warning: nested flexible arrays 12 ./include/net/udp.h:39:8: warning: nested flexible arrays 12 ./include/linux/jbd2.h:1603:16: warning: nested flexible arrays 11 drivers/nvme/target/nvmet.h:323:24: warning: nested flexible arrays 11 drivers/nvme/target/nvmet.h:322:15: warning: nested flexible arrays 11 drivers/nvme/target/nvmet.h:313:8: warning: nested flexible arrays 11 drivers/net/wireless/marvell/mwifiex/fw.h:2304:8: warning: nested flexible arrays 11 drivers/net/wireless/marvell/mwifiex/fw.h:1149:8: warning: nested flexible arrays 11 ./drivers/net/wireless/intel/iwlwifi/dvm/..//fw/api/dbg-tlv.h:219:8: warning: nested flexible arrays 10 sound/usb/caiaq/device.h:60:8: warning: nested flexible arrays 10 drivers/net/wireless/ath/carl9170/fwcmd.h:230:15: warning: nested flexible arrays 10 drivers/net/wireless/ath/carl9170/fwcmd.h:228:8: warning: nested flexible arrays 10 drivers/net/wireless/ath/carl9170/carl9170.h:375:15: warning: nested flexible arrays 10 drivers/net/wireless/ath/carl9170/carl9170.h:233:8: warning: nested flexible arrays 10 drivers/md/bcache/bset.h:157:8: warning: nested flexible arrays 10 ./include/sound/intel-nhlt.h:66:8: warning: nested flexible arrays 10 ./include/pcmcia/cistpl.h:533:15: warning: nested flexible arrays 9 drivers/md/bcache/btree.h:122:9: warning: nested flexible arrays 9 drivers/md/bcache/btree.h:117:8: warning: nested flexible arrays 9 ./include/linux/crypto.h:643:8: warning: nested flexible arrays 9 ./include/crypto/acompress.h:47:8: warning: nested flexible arrays 8 net/dccp/dccp.h:339:15: warning: nested flexible arrays 8 net/dccp/dccp.h:338:8: warning: nested flexible arrays 8 fs/ocfs2/ocfs2_fs.h:968:15: warning: nested flexible arrays 8 fs/ocfs2/ocfs2_fs.h:898:24: warning: nested flexible arrays 8 fs/ocfs2/ocfs2_fs.h:896:15: warning: nested flexible arrays 8 fs/ocfs2/ocfs2_fs.h:878:8: warning: nested flexible arrays 8 drivers/scsi/hisi_sas/hisi_sas.h:565:15: warning: nested flexible arrays 8 drivers/net/wireless/intel/iwlegacy/common.h:549:8: warning: nested flexible arrays 8 drivers/net/wireless/intel/iwlegacy/commands.h:3335:8: warning: nested flexible arrays 8 drivers/net/wireless/intel/iwlegacy/commands.h:1195:8: warning: nested flexible arrays 8 drivers/md/dm-rq.h:27:8: warning: nested flexible arrays 8 drivers/md/bcache/bcache.h:738:8: warning: nested flexible arrays 8 drivers/infiniband/hw/i40iw/i40iw_cm.h:354:15: warning: nested flexible arrays 8 crypto/gcm.c:71:15: warning: nested flexible arrays 8 crypto/ccm.c:46:15: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:2020:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:2007:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1992:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1978:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1963:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1949:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1931:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1906:8: warning: nested flexible arrays 8 ./include/rdma/ib_verbs.h:1892:8: warning: nested flexible arrays 8 ./include/net/cfg80211.h:2830:8: warning: nested flexible arrays 8 ./include/crypto/internal/akcipher.h:16:24: warning: nested flexible arrays 8 ./include/crypto/internal/akcipher.h:15:15: warning: nested flexible arrays 8 ./include/crypto/internal/akcipher.h:13:8: warning: nested flexible arrays 7 fs/btrfs/volumes.h:289:8: warning: nested flexible arrays 7 drivers/net/wireless/ti/wl1251/acx.h:16:8: warning: nested flexible arrays 7 drivers/clk/samsung/clk.h:22:8: warning: nested flexible arrays 7 ./include/linux/mlx5/mlx5_ifc.h:3363:8: warning: nested flexible arrays 6 fs/ocfs2/ocfs2_fs.h:844:15: warning: nested flexible arrays 6 fs/ocfs2/ocfs2_fs.h:505:8: warning: nested flexible arrays 6 fs/ocfs2/ocfs2_fs.h:1083:15: warning: nested flexible arrays 6 fs/cifs/cifsglob.h:135:8: warning: nested flexible arrays 6 drivers/scsi/aic94xx/aic94xx_sas.h:574:15: warning: nested flexible arrays 6 drivers/scsi/aic94xx/aic94xx_sas.h:572:8: warning: nested flexible arrays 6 drivers/scsi/aic94xx/aic94xx_sas.h:319:8: warning: nested flexible arrays 6 drivers/net/wireless/wl3501.h:382:8: warning: nested flexible arrays 6 drivers/net/wireless/wl3501.h:309:8: warning: nested flexible arrays 6 drivers/net/wireless/ti/wlcore/acx.h:54:8: warning: nested flexible arrays 6 drivers/md/raid5.h:249:16: warning: nested flexible arrays 6 ./include/uapi/linux/bcache.h:345:8: warning: nested flexible arrays 6 ./include/linux/mlx5/mlx5_ifc.h:7681:8: warning: nested flexible arrays 6 ./include/linux/mlx5/mlx5_ifc.h:3265:8: warning: nested flexible arrays 6 ./include/linux/ceph/osdmap.h:144:15: warning: nested flexible arrays 6 ./include/crypto/if_alg.h:109:15: warning: nested flexible arrays 5 drivers/scsi/qla2xxx/qla_dbg.h:301:15: warning: nested flexible arrays 5 drivers/scsi/qla2xxx/qla_dbg.h:276:8: warning: nested flexible arrays 5 drivers/scsi/isci/request.h:82:8: warning: nested flexible arrays 5 drivers/scsi/isci/request.h:137:31: warning: nested flexible arrays 5 drivers/scsi/isci/request.h:132:24: warning: nested flexible arrays 5 drivers/scsi/isci/request.h:131:15: warning: nested flexible arrays 5 drivers/net/wireless/wl3501.h:439:8: warning: nested flexible arrays 5 drivers/net/wireless/ti/wl1251/acx.h:149:8: warning: nested flexible arrays 5 drivers/net/wireless/microchip/wilc1000/spi.c:52:15: warning: nested flexible arrays 5 arch/x86/events/zhaoxin/../perf_event.h:199:8: warning: nested flexible arrays 5 arch/x86/events/perf_event.h:199:8: warning: nested flexible arrays 5 arch/x86/events/intel/../perf_event.h:794:24: warning: nested flexible arrays 5 arch/x86/events/intel/../perf_event.h:792:15: warning: nested flexible arrays 5 arch/x86/events/intel/../perf_event.h:789:8: warning: nested flexible arrays 5 arch/x86/events/amd/../perf_event.h:199:8: warning: nested flexible arrays 5 ./include/linux/mlx5/mlx5_ifc.h:7705:8: warning: nested flexible arrays 5 ./include/linux/mlx5/mlx5_ifc.h:7627:8: warning: nested flexible arrays 5 ./include/linux/iomap.h:191:8: warning: nested flexible arrays 5 ./include/linux/ecryptfs.h:93:8: warning: nested flexible arrays 5 ./include/linux/ecryptfs.h:100:15: warning: nested flexible arrays 5 ./include/linux/ceph/ceph_fs.h:508:8: warning: nested flexible arrays 5 ./include/crypto/internal/hash.h:35:24: warning: nested flexible arrays 5 ./include/crypto/internal/hash.h:34:15: warning: nested flexible arrays 5 ./include/crypto/internal/hash.h:32:8: warning: nested flexible arrays 5 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/scan.h:827:15: warning: nested flexible arrays 4 sound/core/vmaster.c:47:8: warning: nested flexible arrays 4 net/xfrm/xfrm_input.c:32:15: warning: nested flexible arrays 4 net/xfrm/xfrm_input.c:31:8: warning: nested flexible arrays 4 net/ipv6/esp6.c:42:8: warning: nested flexible arrays 4 net/ipv6/ah6.c:42:8: warning: nested flexible arrays 4 net/ipv4/inet_fragment.c:36:15: warning: nested flexible arrays 4 net/ipv4/inet_fragment.c:35:8: warning: nested flexible arrays 4 net/ipv4/icmp.c:100:8: warning: nested flexible arrays 4 net/ieee802154/core.h:7:8: warning: nested flexible arrays 4 kernel/trace/trace_uprobe.c:55:8: warning: nested flexible arrays 4 kernel/trace/trace_kprobe.c:55:8: warning: nested flexible arrays 4 kernel/bpf/core.c:1857:15: warning: nested flexible arrays 4 kernel/bpf/core.c:1843:15: warning: nested flexible arrays 4 fs/squashfs/squashfs_fs.h:395:7: warning: nested flexible arrays 4 fs/ocfs2/ocfs2_fs.h:942:8: warning: nested flexible arrays 4 fs/notify/fdinfo.c:43:16: warning: nested flexible arrays 4 fs/nfs_common/nfsacl.c:43:8: warning: nested flexible arrays 4 fs/ext4/mballoc.c:2407:16: warning: nested flexible arrays 4 fs/dlm/dlm_internal.h:455:7: warning: nested flexible arrays 4 fs/block_dev.c:264:8: warning: nested flexible arrays 4 drivers/scsi/hisi_sas/hisi_sas.h:587:8: warning: nested flexible arrays 4 drivers/scsi/hisi_sas/hisi_sas.h:576:7: warning: nested flexible arrays 4 drivers/scsi/hisi_sas/hisi_sas.h:566:24: warning: nested flexible arrays 4 drivers/scsi/hisi_sas/hisi_sas.h:563:8: warning: nested flexible arrays 4 drivers/pcmcia/pcmcia_cis.c:138:8: warning: nested flexible arrays 4 drivers/net/wireless/ti/wlcore/acx.h:474:8: warning: nested flexible arrays 4 drivers/net/wireless/intel/iwlegacy/common.h:551:15: warning: nested flexible arrays 4 drivers/net/wireless/intel/iwlegacy/commands.h:3348:15: warning: nested flexible arrays 4 drivers/net/ethernet/sfc/vfdi.h:167:15: warning: nested flexible arrays 4 drivers/net/ethernet/aquantia/atlantic/hw_atl/../hw_atl/hw_atl_utils.h:235:15: warning: nested flexible arrays 4 drivers/net/ethernet/aquantia/atlantic/hw_atl/../hw_atl/hw_atl_utils.h:232:17: warning: nested flexible arrays 4 drivers/net/ethernet/aquantia/atlantic/hw_atl/../aq_hw.h:173:8: warning: nested flexible arrays 4 drivers/md/dm.c:95:8: warning: nested flexible arrays 4 drivers/md/dm.c:80:8: warning: nested flexible arrays 4 drivers/md/bcache/bcache.h:740:15: warning: nested flexible arrays 4 drivers/infiniband/hw/i40iw/i40iw_cm.h:315:8: warning: nested flexible arrays 4 drivers/infiniband/hw/cxgb4/t4.h:98:7: warning: nested flexible arrays 4 drivers/gpu/drm/amd/amdgpu/si_dpm.h:799:8: warning: nested flexible arrays 4 drivers/firmware/efi/libstub/file.c:32:8: warning: nested flexible arrays 4 drivers/firmware/efi/libstub/efi-stub-helper.c:428:21: warning: nested flexible arrays 4 crypto/rsa-pkcs1pad.c:100:8: warning: nested flexible arrays 4 crypto/gcm.c:98:16: warning: nested flexible arrays 4 crypto/gcm.c:63:8: warning: nested flexible arrays 4 crypto/gcm.c:53:8: warning: nested flexible arrays 4 crypto/gcm.c:37:8: warning: nested flexible arrays 4 crypto/drbg.c:1669:8: warning: nested flexible arrays 4 crypto/ctr.c:22:8: warning: nested flexible arrays 4 crypto/ccm.c:39:8: warning: nested flexible arrays 4 crypto/ccm.c:33:8: warning: nested flexible arrays 4 crypto/asymmetric_keys/restrict.c:19:15: warning: nested flexible arrays 4 ./include/scsi/fc_encode.h:27:15: warning: nested flexible arrays 4 ./include/net/sctp/structs.h:1117:15: warning: nested flexible arrays 4 ./include/net/sctp/structs.h:1116:8: warning: nested flexible arrays 4 ./include/net/nsh.h:213:15: warning: nested flexible arrays 4 ./include/net/nsh.h:208:8: warning: nested flexible arrays 4 ./include/linux/sctp.h:724:8: warning: nested flexible arrays 4 ./include/linux/mlx5/mlx5_ifc.h:6331:8: warning: nested flexible arrays 4 ./include/linux/mlx5/mlx5_ifc.h:6224:8: warning: nested flexible arrays 3 sound/usb/6fire/comm.h:19:8: warning: nested flexible arrays 3 net/netfilter/x_tables.c:796:8: warning: nested flexible arrays 3 net/netfilter/x_tables.c:791:8: warning: nested flexible arrays 3 fs/overlayfs/overlayfs.h:102:15: warning: nested flexible arrays 3 fs/overlayfs/overlayfs.h:100:8: warning: nested flexible arrays 3 fs/ocfs2/ocfs2_fs.h:815:8: warning: nested flexible arrays 3 fs/ocfs2/ocfs2_fs.h:1066:8: warning: nested flexible arrays 3 fs/ocfs2/ocfs2_fs.h:1046:8: warning: nested flexible arrays 3 fs/ocfs2/ocfs2_fs.h:1033:8: warning: nested flexible arrays 3 fs/f2fs/f2fs.h:1701:16: warning: nested flexible arrays 3 drivers/tty/hvc/hvc_console.h:35:8: warning: nested flexible arrays 3 drivers/staging/wlan-ng/hfa384x.h:1229:8: warning: nested flexible arrays 3 drivers/staging/rtl8192u/ieee80211/ieee80211.h:977:8: warning: nested flexible arrays 3 drivers/nvdimm/nd.h:163:8: warning: nested flexible arrays 3 drivers/net/wireless/ti/wl18xx/../wlcore/acx.h:54:8: warning: nested flexible arrays 3 drivers/net/wireless/ti/wl12xx/../wlcore/acx.h:54:8: warning: nested flexible arrays 3 drivers/net/wireless/ath/ath10k/htt.h:1793:15: warning: nested flexible arrays 3 drivers/net/ethernet/intel/ice/ice_adminq_cmd.h:664:15: warning: nested flexible arrays 3 drivers/infiniband/hw/cxgb4/t4fw_ri_api.h:646:8: warning: nested flexible arrays 3 drivers/infiniband/hw/cxgb4/t4.h:113:7: warning: nested flexible arrays 3 drivers/gpu/drm/nouveau/nvif/notify.c:169:16: warning: nested flexible arrays 3 drivers/gpu/drm/nouveau/nouveau_svm.c:73:8: warning: nested flexible arrays 3 drivers/crypto/ccp/ccp-crypto.h:112:8: warning: nested flexible arrays 3 drivers/clk/x86/clk-cgu.h:79:8: warning: nested flexible arrays 3 ./include/uapi/linux/bcache.h:355:9: warning: nested flexible arrays 3 ./include/uapi/linux/bcache.h:354:9: warning: nested flexible arrays 3 ./include/scsi/scsi_bsg_iscsi.h:69:15: warning: nested flexible arrays 3 ./include/scsi/scsi_bsg_iscsi.h:67:8: warning: nested flexible arrays 3 ./include/linux/sctp.h:664:8: warning: nested flexible arrays 3 ./include/linux/sctp.h:227:8: warning: nested flexible arrays 3 ./include/linux/mlx5/mlx5_ifc.h:6297:8: warning: nested flexible arrays 3 ./include/linux/mlx5/mlx5_ifc.h:4789:8: warning: nested flexible arrays 3 ./include/linux/mlx5/mlx5_ifc.h:4227:8: warning: nested flexible arrays 3 ./include/crypto/if_alg.h:95:8: warning: nested flexible arrays 2 sound/usb/6fire/midi.h:15:8: warning: nested flexible arrays 2 security/integrity/evm/evm.h:46:8: warning: nested flexible arrays 2 net/nfc/hci/hci.h:21:8: warning: nested flexible arrays 2 net/netfilter/nft_set_pipapo.h:175:8: warning: nested flexible arrays 2 net/dccp/ccids/lib/../../dccp.h:339:15: warning: nested flexible arrays 2 net/dccp/ccids/lib/../../dccp.h:338:8: warning: nested flexible arrays 2 net/dccp/ccids/../dccp.h:339:15: warning: nested flexible arrays 2 net/dccp/ccids/../dccp.h:338:8: warning: nested flexible arrays 2 fs/xfs/xfs_rmap_item.h:46:8: warning: nested flexible arrays 2 fs/xfs/xfs_refcount_item.h:45:8: warning: nested flexible arrays 2 fs/xfs/xfs_log_priv.h:195:16: warning: nested flexible arrays 2 fs/xfs/xfs_bmap_item.h:43:8: warning: nested flexible arrays 2 fs/ocfs2/ocfs2_fs.h:858:8: warning: nested flexible arrays 2 fs/notify/fanotify/fanotify.h:169:8: warning: nested flexible arrays 2 fs/notify/fanotify/fanotify.h:155:8: warning: nested flexible arrays 2 fs/ecryptfs/ecryptfs_kernel.h:364:8: warning: nested flexible arrays 2 fs/cifs/smb2inode.c:50:8: warning: nested flexible arrays 2 drivers/staging/rtl8192u/ieee80211/ieee80211.h:1008:8: warning: nested flexible arrays 2 drivers/staging/rtl8192e/rtllib.h:824:8: warning: nested flexible arrays 2 drivers/scsi/isci/task.h:88:15: warning: nested flexible arrays 2 drivers/scsi/isci/task.h:84:8: warning: nested flexible arrays 2 drivers/scsi/hisi_sas/hisi_sas.h:593:8: warning: nested flexible arrays 2 drivers/net/wireless/wl3501.h:575:8: warning: nested flexible arrays 2 drivers/net/wireless/ti/wlcore/wl12xx_80211.h:109:8: warning: nested flexible arrays 2 drivers/net/wireless/ti/wl18xx/acx.h:266:8: warning: nested flexible arrays 2 drivers/net/wireless/ti/wl12xx/acx.h:241:8: warning: nested flexible arrays 2 drivers/net/wireless/ti/wl1251/wl12xx_80211.h:120:8: warning: nested flexible arrays 2 drivers/net/wireless/ti/wl1251/acx.h:1060:8: warning: nested flexible arrays 2 drivers/net/wireless/quantenna/qtnfmac/qlink.h:1645:8: warning: nested flexible arrays 2 drivers/net/wireless/quantenna/qtnfmac/qlink.h:1569:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlwifi/mvm/sta.h:351:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlwifi/fw/api/dbg-tlv.h:246:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlwifi/fw/api/dbg-tlv.h:203:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlwifi/fw/api/dbg-tlv.h:178:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlegacy/commands.h:2662:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlegacy/3945.h:126:15: warning: nested flexible arrays 2 drivers/net/wireless/intel/iwlegacy/3945.h:125:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/ipw2x00/libipw.h:477:8: warning: nested flexible arrays 2 drivers/net/wireless/intel/ipw2x00/libipw.h:448:8: warning: nested flexible arrays 2 drivers/net/wireless/ath/ath10k/htt.h:1809:8: warning: nested flexible arrays 2 drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h:59:8: warning: nested flexible arrays 2 drivers/media/platform/xilinx/xilinx-dma.h:73:8: warning: nested flexible arrays 2 drivers/md/bcache/request.h:5:8: warning: nested flexible arrays 2 drivers/md/bcache/request.h:33:9: warning: nested flexible arrays 2 drivers/md/bcache/request.c:463:8: warning: nested flexible arrays 2 drivers/md/bcache/movinggc.c:15:8: warning: nested flexible arrays 2 drivers/md/bcache/journal.h:83:8: warning: nested flexible arrays 2 drivers/infiniband/sw/rdmavt/mr.h:53:8: warning: nested flexible arrays 2 drivers/infiniband/hw/mlx5/fs.c:1058:23: warning: nested flexible arrays 2 drivers/infiniband/hw/cxgb4/t4fw_ri_api.h:611:15: warning: nested flexible arrays 2 drivers/infiniband/hw/cxgb4/t4fw_ri_api.h:598:8: warning: nested flexible arrays 2 drivers/infiniband/hw/cxgb4/t4.h:392:8: warning: nested flexible arrays 2 drivers/infiniband/core/uverbs_ioctl.c:43:8: warning: nested flexible arrays 2 drivers/gpu/drm/nouveau/nvif/object.c:61:16: warning: nested flexible arrays 2 drivers/gpu/drm/nouveau/nvif/object.c:266:16: warning: nested flexible arrays 2 drivers/gpu/drm/nouveau/nvif/object.c:185:16: warning: nested flexible arrays 2 drivers/gpu/drm/nouveau/nvif/object.c:142:16: warning: nested flexible arrays 2 drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h:293:7: warning: nested flexible arrays 2 drivers/crypto/qce/cipher.h:34:8: warning: nested flexible arrays 2 drivers/crypto/allwinner/sun8i-ss/sun8i-ss.h:151:8: warning: nested flexible arrays 2 drivers/block/rnbd/rnbd-srv-dev.h:22:8: warning: nested flexible arrays 2 crypto/chacha20poly1305.c:64:15: warning: nested flexible arrays 2 crypto/adiantum.c:101:15: warning: nested flexible arrays 2 ./include/sound/intel-nhlt.h:56:8: warning: nested flexible arrays 2 ./include/scsi/fc_encode.h:25:8: warning: nested flexible arrays 2 ./include/net/sctp/structs.h:334:8: warning: nested flexible arrays 2 ./include/net/nfc/nci.h:518:8: warning: nested flexible arrays 2 ./include/linux/sctp.h:390:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:7729:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:7494:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:6414:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:6367:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:5680:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:3863:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:3403:8: warning: nested flexible arrays 2 ./include/linux/mlx5/mlx5_ifc.h:10373:8: warning: nested flexible arrays 2 ./include/linux/hyperv.h:1055:8: warning: nested flexible arrays 2 ./include/linux/efi.h:923:15: warning: nested flexible arrays 2 ./include/linux/efi.h:922:8: warning: nested flexible arrays 2 ./include/linux/ceph/osdmap.h:140:8: warning: nested flexible arrays 2 ./include/crypto/cryptd.h:52:8: warning: nested flexible arrays 2 ./include/crypto/cryptd.h:33:8: warning: nested flexible arrays 2 ./include/crypto/cryptd.h:21:8: warning: nested flexible arrays 2 ./include/asm-generic/hyperv-tlfs.h:403:8: warning: nested flexible arrays 2 ./include/asm-generic/hyperv-tlfs.h:352:8: warning: nested flexible arrays 2 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/dbg.h:83:8: warning: nested flexible arrays 1 sound/usb/misc/ua101.c:112:24: warning: nested flexible arrays 1 sound/usb/hiface/pcm.c:24:8: warning: nested flexible arrays 1 sound/usb/6fire/pcm.h:24:8: warning: nested flexible arrays 1 sound/soc/intel/skylake/skl-i2s.h:80:8: warning: nested flexible arrays 1 security/keys/trusted-keys/trusted_tpm1.c:37:8: warning: nested flexible arrays 1 security/keys/dh.c:82:8: warning: nested flexible arrays 1 security/integrity/ima/ima_template_lib.c:269:16: warning: nested flexible arrays 1 security/integrity/ima/ima_main.c:752:16: warning: nested flexible arrays 1 security/integrity/ima/ima_init.c:50:16: warning: nested flexible arrays 1 security/integrity/ima/ima_api.c:220:16: warning: nested flexible arrays 1 security/integrity/evm/../integrity.h:89:8: warning: nested flexible arrays 1 net/sched/sch_taprio.c:84:8: warning: nested flexible arrays 1 net/sched/sch_atm.c:64:8: warning: nested flexible arrays 1 net/rxrpc/key.c:968:16: warning: nested flexible arrays 1 net/nfc/nci/hci.c:53:8: warning: nested flexible arrays 1 net/netfilter/nft_set_rbtree.c:25:8: warning: nested flexible arrays 1 net/netfilter/nft_set_hash.c:417:8: warning: nested flexible arrays 1 net/netfilter/nft_set_hash.c:29:8: warning: nested flexible arrays 1 net/netfilter/nft_set_bitmap.c:15:8: warning: nested flexible arrays 1 net/ipv4/esp4.c:26:8: warning: nested flexible arrays 1 net/ipv4/ah4.c:18:8: warning: nested flexible arrays 1 net/core/bpf_sk_storage.c:67:8: warning: nested flexible arrays 1 net/ceph/auth_x_protocol.h:63:8: warning: nested flexible arrays 1 net/bluetooth/rfcomm/tty.c:46:8: warning: nested flexible arrays 1 net/bluetooth/mgmt_config.c:29:16: warning: nested flexible arrays 1 net/bluetooth/l2cap_core.c:7985:16: warning: nested flexible arrays 1 net/bluetooth/l2cap_core.c:5915:16: warning: nested flexible arrays 1 net/bluetooth/l2cap_core.c:3930:16: warning: nested flexible arrays 1 net/bluetooth/l2cap_core.c:1383:16: warning: nested flexible arrays 1 net/bluetooth/l2cap_core.c:1382:8: warning: nested flexible arrays 1 lib/crc-t10dif.c:65:16: warning: nested flexible arrays 1 lib/bch.c:112:8: warning: nested flexible arrays 1 kernel/events/core.c:7809:8: warning: nested flexible arrays 1 kernel/bpf/bpf_struct_ops.c:29:8: warning: nested flexible arrays 1 fs/ubifs/commit.c:497:8: warning: nested flexible arrays 1 fs/ocfs2/xattr.c:53:8: warning: nested flexible arrays 1 fs/jffs2/summary.h:140:7: warning: nested flexible arrays 1 fs/dlm/user.c:58:16: warning: nested flexible arrays 1 fs/dlm/user.c:52:8: warning: nested flexible arrays 1 fs/dlm/requestqueue.c:18:8: warning: nested flexible arrays 1 fs/dlm/midcomms.c:59:15: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:899:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:894:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:886:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:878:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:864:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:847:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:830:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:818:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:811:8: warning: nested flexible arrays 1 fs/cifs/smb2pdu.h:805:8: warning: nested flexible arrays 1 fs/btrfs/send.c:44:15: warning: nested flexible arrays 1 fs/btrfs/send.c:43:8: warning: nested flexible arrays 1 drivers/w1/w1_netlink.c:216:16: warning: nested flexible arrays 1 drivers/w1/w1_netlink.c:195:16: warning: nested flexible arrays 1 drivers/usb/host/xhci-dbgcap.h:100:8: warning: nested flexible arrays 1 drivers/usb/host/oxu210hp-hcd.c:396:8: warning: nested flexible arrays 1 drivers/usb/host/ehci-fsl.c:419:8: warning: nested flexible arrays 1 drivers/usb/gadget/function/uvc_configfs.c:858:8: warning: nested flexible arrays 1 drivers/usb/gadget/function/u_serial.c:98:8: warning: nested flexible arrays 1 drivers/usb/class/cdc-acm.h:83:8: warning: nested flexible arrays 1 drivers/tty/synclinkmp.c:151:16: warning: nested flexible arrays 1 drivers/tty/synclink_gt.c:238:8: warning: nested flexible arrays 1 drivers/tty/synclink.c:178:8: warning: nested flexible arrays 1 drivers/tty/serial/kgdb_nmi.c:90:8: warning: nested flexible arrays 1 drivers/tty/serial/ifx6x60.h:56:8: warning: nested flexible arrays 1 drivers/tty/rocket_int.h:1127:8: warning: nested flexible arrays 1 drivers/tty/nozomi.c:318:8: warning: nested flexible arrays 1 drivers/tty/n_gsm.c:125:8: warning: nested flexible arrays 1 drivers/tty/mxser.c:220:8: warning: nested flexible arrays 1 drivers/tty/moxa.c:129:8: warning: nested flexible arrays 1 drivers/tty/isicom.c:198:9: warning: nested flexible arrays 1 drivers/tty/ipwireless/tty.c:46:8: warning: nested flexible arrays 1 drivers/tty/goldfish.c:36:8: warning: nested flexible arrays 1 drivers/staging/rtl8192u/ieee80211/ieee80211.h:991:8: warning: nested flexible arrays 1 drivers/staging/rtl8192u/ieee80211/ieee80211.h:971:8: warning: nested flexible arrays 1 drivers/staging/rtl8192u/ieee80211/ieee80211.h:966:8: warning: nested flexible arrays 1 drivers/staging/rtl8192u/ieee80211/ieee80211.h:957:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtllib.h:846:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtllib.h:838:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtllib.h:818:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtllib.h:813:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtllib.h:808:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtllib.h:799:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtl8192e/../rtllib.h:846:8: warning: nested flexible arrays 1 drivers/staging/rtl8192e/rtl8192e/../rtllib.h:824:8: warning: nested flexible arrays 1 drivers/staging/ks7010/ks_hostif.h:211:8: warning: nested flexible arrays 1 drivers/staging/greybus/uart.c:43:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:99:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:95:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:90:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:84:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:78:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:71:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:129:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:125:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:121:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:117:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:112:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:108:8: warning: nested flexible arrays 1 drivers/staging/greybus/audio_apbridgea.h:104:8: warning: nested flexible arrays 1 drivers/staging/gdm724x/gdm_tty.h:25:8: warning: nested flexible arrays 1 drivers/staging/fwserial/fwserial.h:238:8: warning: nested flexible arrays 1 drivers/staging/comedi/drivers/jr3_pci.c:93:7: warning: nested flexible arrays 1 drivers/scsi/qla2xxx/qla_tmpl.h:76:24: warning: nested flexible arrays 1 drivers/scsi/qla2xxx/qla_tmpl.h:66:17: warning: nested flexible arrays 1 drivers/scsi/pmcraid.h:658:8: warning: nested flexible arrays 1 drivers/scsi/pmcraid.h:630:8: warning: nested flexible arrays 1 drivers/scsi/pm8001/pm80xx_hwi.h:556:8: warning: nested flexible arrays 1 drivers/scsi/pm8001/pm8001_hwi.h:337:8: warning: nested flexible arrays 1 drivers/scsi/ipr.h:1465:8: warning: nested flexible arrays 1 drivers/rpmsg/qcom_glink_native.c:911:16: warning: nested flexible arrays 1 drivers/rpmsg/qcom_glink_native.c:790:16: warning: nested flexible arrays 1 drivers/rpmsg/qcom_glink_native.c:48:8: warning: nested flexible arrays 1 drivers/rpmsg/qcom_glink_native.c:408:16: warning: nested flexible arrays 1 drivers/rpmsg/qcom_glink_native.c:1266:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:948:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:451:8: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:3237:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:2294:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:1930:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:1370:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:1117:16: warning: nested flexible arrays 1 drivers/pci/controller/pci-hyperv.c:1028:16: warning: nested flexible arrays 1 drivers/nvme/target/tcp.c:93:8: warning: nested flexible arrays 1 drivers/nvme/target/tcp.c:55:8: warning: nested flexible arrays 1 drivers/nvme/target/rdma.c:56:8: warning: nested flexible arrays 1 drivers/nvme/target/loop.c:29:8: warning: nested flexible arrays 1 drivers/nvme/target/loop.c:18:8: warning: nested flexible arrays 1 drivers/nvme/target/fc.c:70:8: warning: nested flexible arrays 1 drivers/nfc/pn533/usb.c:259:8: warning: nested flexible arrays 1 drivers/nfc/pn533/usb.c:252:8: warning: nested flexible arrays 1 drivers/net/wireless/wl3501.h:426:8: warning: nested flexible arrays 1 drivers/net/wireless/wl3501.h:266:8: warning: nested flexible arrays 1 drivers/net/wireless/wl3501.h:258:8: warning: nested flexible arrays 1 drivers/net/wireless/wl3501.h:253:8: warning: nested flexible arrays 1 drivers/net/wireless/wl3501.h:248:8: warning: nested flexible arrays 1 drivers/net/wireless/wl3501.h:237:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/wl12xx_80211.h:133:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/scan.h:125:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:696:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:685:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:681:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:677:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:656:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:647:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:634:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:599:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:583:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:563:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:554:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:539:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:464:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:431:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:395:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:386:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:378:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:288:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:265:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:257:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/cmd.h:217:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:944:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:930:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:919:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:901:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:878:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:822:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:810:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:801:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:788:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:773:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:760:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:741:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:718:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:689:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:664:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:644:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:629:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:584:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:566:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:558:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:546:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:529:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:518:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:458:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:452:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:446:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:434:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:424:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:417:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:402:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:385:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:369:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:360:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:352:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:343:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:327:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:312:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:303:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:295:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:287:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:280:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:271:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:262:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:213:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:205:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:195:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:185:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:172:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:153:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wlcore/acx.h:115:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/scan.h:97:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/scan.h:34:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/cmd.h:63:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/cmd.h:55:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/cmd.h:48:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/cmd.h:40:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/cmd.h:34:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/cmd.h:14:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:73:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:48:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:382:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:373:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:349:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:344:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:335:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:307:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:294:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl18xx/acx.h:285:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/scan.h:67:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/scan.h:56:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/scan.h:110:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/scan.h:102:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/cmd.h:92:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/cmd.h:82:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/cmd.h:63:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/cmd.h:47:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/cmd.h:32:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/cmd.h:17:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/acx.h:29:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/../wlcore/scan.h:53:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl12xx/../wlcore/acx.h:474:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/wl12xx_80211.h:144:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/wl12xx_80211.h:136:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/wl12xx_80211.h:131:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/wl12xx_80211.h:108:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:96:9: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:377:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:328:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:312:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:300:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:280:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:271:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:234:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:216:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/cmd.h:138:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:89:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:848:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:832:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:817:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:809:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:790:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:783:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:776:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:769:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:762:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:752:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:711:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:697:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:683:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:555:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:510:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:49:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:496:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:485:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:431:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:402:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:381:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:359:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:342:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:330:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:314:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:301:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:267:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:176:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1292:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1235:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:122:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1224:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1201:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1180:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1145:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1137:8: warning: nested flexible arrays 1 drivers/net/wireless/ti/wl1251/acx.h:1088:8: warning: nested flexible arrays 1 drivers/net/wireless/rndis_wlan.c:209:15: warning: nested flexible arrays 1 drivers/net/wireless/rndis_wlan.c:207:8: warning: nested flexible arrays 1 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h:1405:8: warning: nested flexible arrays 1 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h:1399:8: warning: nested flexible arrays 1 drivers/net/wireless/quantenna/qtnfmac/qlink.h:1680:8: warning: nested flexible arrays 1 drivers/net/wireless/quantenna/qtnfmac/qlink.h:1659:8: warning: nested flexible arrays 1 drivers/net/wireless/quantenna/qtnfmac/qlink.h:1620:8: warning: nested flexible arrays 1 drivers/net/wireless/quantenna/qtnfmac/qlink.h:1608:8: warning: nested flexible arrays 1 drivers/net/wireless/microchip/wilc1000/spi.c:50:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:4499:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:4213:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:4203:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:4067:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3957:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3862:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3782:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3753:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3668:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3644:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3603:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3561:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3530:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3499:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3414:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3385:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3355:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3316:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3280:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3208:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3139:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3051:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:3010:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2985:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2955:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2922:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2863:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2829:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2768:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2726:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2667:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2590:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2496:8: warning: nested flexible arrays 1 drivers/net/wireless/marvell/mwl8k.c:2347:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlwifi/mvm/d3.c:1465:24: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlwifi/fw/dbg.h:83:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlwifi/fw/api/dbg-tlv.h:270:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlwifi/dvm/commands.h:2473:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlwifi/dvm/commands.h:2344:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlegacy/common.h:521:15: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlegacy/common.h:520:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlegacy/commands.h:2670:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlegacy/commands.h:2526:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/iwlegacy/commands.h:2482:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/libipw.h:469:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/libipw.h:442:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/libipw.h:434:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/libipw.h:420:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/libipw.h:403:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/ipw2200.h:690:15: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/ipw2200.h:688:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/ipw2200.h:505:15: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/ipw2200.h:503:8: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/ipw2100.h:786:15: warning: nested flexible arrays 1 drivers/net/wireless/intel/ipw2x00/ipw2100.h:785:8: warning: nested flexible arrays 1 drivers/net/wireless/ath/wil6210/wmi.c:4024:16: warning: nested flexible arrays 1 drivers/net/wireless/ath/wil6210/wmi.c:2761:16: warning: nested flexible arrays 1 drivers/net/wireless/ath/wil6210/main.c:467:16: warning: nested flexible arrays 1 drivers/net/wireless/ath/wil6210/cfg80211.c:871:16: warning: nested flexible arrays 1 drivers/net/wireless/ath/ath10k/htt.h:1791:8: warning: nested flexible arrays 1 drivers/net/usb/hso.c:195:8: warning: nested flexible arrays 1 drivers/net/ethernet/sfc/vfdi.h:162:8: warning: nested flexible arrays 1 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c:91:8: warning: nested flexible arrays 1 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c:86:8: warning: nested flexible arrays 1 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c:77:8: warning: nested flexible arrays 1 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c:69:8: warning: nested flexible arrays 1 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c:63:8: warning: nested flexible arrays 1 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c:57:8: warning: nested flexible arrays 1 drivers/net/ethernet/mellanox/mlxsw/spectrum_acl.c:23:8: warning: nested flexible arrays 1 drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c:133:8: warning: nested flexible arrays 1 drivers/net/ethernet/mellanox/mlx5/core/en_accel/tls.h:75:8: warning: nested flexible arrays 1 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h:246:15: warning: nested flexible arrays 1 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h:244:8: warning: nested flexible arrays 1 drivers/net/ethernet/intel/ice/ice_adminq_cmd.h:654:8: warning: nested flexible arrays 1 drivers/mmc/host/vub300.c:296:8: warning: nested flexible arrays 1 drivers/mmc/host/vub300.c:153:7: warning: nested flexible arrays 1 drivers/mmc/core/sdio_uart.c:63:8: warning: nested flexible arrays 1 drivers/media/usb/siano/smsusb.c:38:8: warning: nested flexible arrays 1 drivers/md/raid5-ppl.c:135:8: warning: nested flexible arrays 1 drivers/md/raid5-cache.c:82:8: warning: nested flexible arrays 1 drivers/md/md-multipath.h:25:8: warning: nested flexible arrays 1 drivers/md/dm-writecache.c:195:8: warning: nested flexible arrays 1 drivers/md/dm-thin.c:229:8: warning: nested flexible arrays 1 drivers/md/dm-clone-target.c:69:8: warning: nested flexible arrays 1 drivers/md/bcache/writeback.c:761:8: warning: nested flexible arrays 1 drivers/md/bcache/writeback.c:245:8: warning: nested flexible arrays 1 drivers/md/bcache/super.c:481:9: warning: nested flexible arrays 1 drivers/md/bcache/extents.c:427:33: warning: nested flexible arrays 1 drivers/md/bcache/debug.c:159:8: warning: nested flexible arrays 1 drivers/md/bcache/btree.c:340:9: warning: nested flexible arrays 1 drivers/md/bcache/btree.c:2175:25: warning: nested flexible arrays 1 drivers/md/bcache/btree.c:1089:9: warning: nested flexible arrays 1 drivers/md/bcache/bset.c:1196:9: warning: nested flexible arrays 1 drivers/md/bcache/alloc.c:621:9: warning: nested flexible arrays 1 drivers/md/bcache/alloc.c:544:9: warning: nested flexible arrays 1 drivers/md/bcache/alloc.c:540:8: warning: nested flexible arrays 1 drivers/isdn/capi/capi.c:82:8: warning: nested flexible arrays 1 drivers/ipack/devices/ipoctal.c:30:8: warning: nested flexible arrays 1 drivers/input/keyboard/applespi.c:296:15: warning: nested flexible arrays 1 drivers/input/keyboard/applespi.c:290:8: warning: nested flexible arrays 1 drivers/infiniband/hw/mlx5/devx.c:42:8: warning: nested flexible arrays 1 drivers/infiniband/hw/mlx5/devx.c:32:8: warning: nested flexible arrays 1 drivers/infiniband/hw/hfi1/mad.c:63:8: warning: nested flexible arrays 1 drivers/infiniband/hw/hfi1/firmware.c:149:8: warning: nested flexible arrays 1 drivers/infiniband/core/uverbs_std_types_flow_action.c:218:8: warning: nested flexible arrays 1 drivers/infiniband/core/cm.c:238:8: warning: nested flexible arrays 1 drivers/hwspinlock/stm32_hwspinlock.c:23:8: warning: nested flexible arrays 1 drivers/hwspinlock/sprd_hwspinlock.c:35:8: warning: nested flexible arrays 1 drivers/hwspinlock/sirf_hwspinlock.c:21:8: warning: nested flexible arrays 1 drivers/hv/vmbus_drv.c:1023:8: warning: nested flexible arrays 1 drivers/gpu/drm/xlnx/zynqmp_disp.c:120:8: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c:78:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c:377:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/uvmm.c:155:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/ummu.c:109:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/umem.c:147:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c:136:23: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/engine/device/user.c:109:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/ioctl.c:86:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/ioctl.c:53:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/ioctl.c:433:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/ioctl.c:300:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/ioctl.c:257:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/ioctl.c:168:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/client.c:76:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/client.c:71:8: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/client.c:194:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvkm/core/client.c:133:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/object.c:34:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/object.c:247:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/object.c:171:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/object.c:124:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/object.c:105:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/notify.c:67:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/notify.c:36:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/notify.c:148:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/notify.c:115:21: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/fifo.c:74:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/fifo.c:28:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nvif/client.c:66:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_usif.c:76:21: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_usif.c:35:8: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_usif.c:300:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_usif.c:268:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_usif.c:129:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_usif.c:126:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_svm.c:625:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_nvif.c:77:21: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_chan.c:550:16: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/nouveau_abi16.c:370:15: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/dispnv50/disp.c:676:24: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/dispnv50/disp.c:675:25: warning: nested flexible arrays 1 drivers/gpu/drm/nouveau/dispnv50/disp.c:646:16: warning: nested flexible arrays 1 drivers/gpu/drm/i915/gvt/opregion.c:116:8: warning: nested flexible arrays 1 drivers/gpu/drm/amd/amdgpu/si_dpm.h:958:8: warning: nested flexible arrays 1 drivers/gpu/drm/amd/amdgpu/si_dpm.h:818:8: warning: nested flexible arrays 1 drivers/crypto/sa2ul.h:326:8: warning: nested flexible arrays 1 drivers/crypto/picoxcell_crypto.c:79:8: warning: nested flexible arrays 1 drivers/crypto/padlock-sha.c:23:8: warning: nested flexible arrays 1 drivers/crypto/marvell/octeontx/otx_cptvf_algs.h:165:8: warning: nested flexible arrays 1 drivers/crypto/img-hash.c:82:8: warning: nested flexible arrays 1 drivers/crypto/chelsio/chtls/chtls_io.c:162:16: warning: nested flexible arrays 1 drivers/crypto/chelsio/chcr_ktls.h:67:8: warning: nested flexible arrays 1 drivers/crypto/chelsio/chcr_crypto.h:293:8: warning: nested flexible arrays 1 drivers/crypto/chelsio/chcr_core.h:172:8: warning: nested flexible arrays 1 drivers/crypto/chelsio/chcr_core.h:165:8: warning: nested flexible arrays 1 drivers/crypto/chelsio/chcr_core.h:137:8: warning: nested flexible arrays 1 drivers/crypto/atmel-aes.c:161:8: warning: nested flexible arrays 1 drivers/crypto/amlogic/amlogic-gxl.h:109:8: warning: nested flexible arrays 1 drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h:188:8: warning: nested flexible arrays 1 drivers/clk/sifive/fu540-prci.c:145:8: warning: nested flexible arrays 1 drivers/clk/samsung/clk-exynos5433.c:5499:8: warning: nested flexible arrays 1 drivers/clk/clk-bm1880.c:62:8: warning: nested flexible arrays 1 drivers/clk/bcm/clk-bcm63xx-gate.c:23:8: warning: nested flexible arrays 1 drivers/clk/bcm/clk-bcm2835.c:313:8: warning: nested flexible arrays 1 drivers/char/ttyprintk.c:20:8: warning: nested flexible arrays 1 drivers/char/pcmcia/synclink_cs.c:137:16: warning: nested flexible arrays 1 drivers/char/../tty/hvc/hvc_console.h:35:8: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:719:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:613:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:57:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:549:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:438:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:367:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:329:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:284:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:241:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:199:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:155:16: warning: nested flexible arrays 1 drivers/acpi/nfit/intel.c:122:16: warning: nested flexible arrays 1 crypto/xts.c:33:8: warning: nested flexible arrays 1 crypto/lrw.c:52:8: warning: nested flexible arrays 1 crypto/essiv.c:59:8: warning: nested flexible arrays 1 crypto/cts.c:59:8: warning: nested flexible arrays 1 crypto/cryptd.c:79:8: warning: nested flexible arrays 1 crypto/chacha20poly1305.c:51:8: warning: nested flexible arrays 1 crypto/chacha20poly1305.c:45:8: warning: nested flexible arrays 1 crypto/chacha20poly1305.c:33:8: warning: nested flexible arrays 1 crypto/algif_hash.c:19:8: warning: nested flexible arrays 1 crypto/adiantum.c:76:8: warning: nested flexible arrays 1 crypto/adiantum.c:120:16: warning: nested flexible arrays 1 ./include/uapi/linux/wmi.h:40:8: warning: nested flexible arrays 1 ./include/uapi/linux/sctp.h:633:7: warning: nested flexible arrays 1 ./include/uapi/linux/fuse.h:817:8: warning: nested flexible arrays 1 ./include/sound/sof/ext_manifest.h:82:8: warning: nested flexible arrays 1 ./include/rdma/ib_verbs.h:2121:8: warning: nested flexible arrays 1 ./include/net/tls.h:99:8: warning: nested flexible arrays 1 ./include/net/netfilter/nf_conntrack_timeout.h:20:8: warning: nested flexible arrays 1 ./include/linux/sctp.h:617:8: warning: nested flexible arrays 1 ./include/linux/sctp.h:600:8: warning: nested flexible arrays 1 ./include/linux/sctp.h:442:8: warning: nested flexible arrays 1 ./include/linux/sctp.h:345:8: warning: nested flexible arrays 1 ./include/linux/mlx5/mlx5_ifc.h:5049:8: warning: nested flexible arrays 1 ./include/linux/mlx5/mlx5_ifc.h:4838:8: warning: nested flexible arrays 1 ./include/linux/mlx5/mlx5_ifc.h:4683:8: warning: nested flexible arrays 1 ./include/linux/mlx5/mlx5_ifc.h:4352:8: warning: nested flexible arrays 1 ./include/linux/mlx5/mlx5_ifc.h:1980:8: warning: nested flexible arrays 1 ./include/linux/greybus/greybus_protocols.h:2018:8: warning: nested flexible arrays 1 ./include/linux/greybus/greybus_protocols.h:2002:15: warning: nested flexible arrays 1 ./include/linux/greybus/greybus_protocols.h:1999:8: warning: nested flexible arrays 1 ./include/linux/cyclades.h:119:8: warning: nested flexible arrays 1 ./include/asm-generic/hyperv-tlfs.h:440:8: warning: nested flexible arrays 1 ./include/asm-generic/hyperv-tlfs.h:434:15: warning: nested flexible arrays 1 ./include/asm-generic/hyperv-tlfs.h:431:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/tx.h:801:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/tx.h:782:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/tdls.h:184:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/tdls.h:137:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/tdls.h:121:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/tdls.h:109:8: warning: nested flexible arrays 1 ./drivers/net/wireless/intel/iwlwifi/mvm/..//fw/api/scan.h:820:8: warning: nested flexible arrays
On Thu, Oct 01, 2020 at 09:41:21PM +0200, Luc Van Oostenryck wrote:
> On Thu, Oct 01, 2020 at 12:27:56PM -0700, Linus Torvalds wrote:
> > On Thu, Oct 1, 2020 at 12:17 PM Luc Van Oostenryck
> > <luc.vanoostenryck@gmail.com> wrote:
> > >
> > > > So in the kernel, we would
> > > >
> > > > - start warning about 'sizeof(flex_struct)'
> > >
> > > Adding this warning by default annoys me slightly because it will
> > > add 5700+ warnings to the 18000 already present and I think sparse
> > > is already underused because it is very/too noisy. But I guess that
> > > most occurrences come from a few macros and thus should be easy to
> > > get rid off.
> >
> > Hopefully. I'll try to take a look. Do you have the sparse changes in
> > a git branch already so that I can just try that directly?
>
> What I posted yesterday is on
> git://git.kernel.org/pub/scm/devel/sparse/sparse-dev.git flex-array
>
> > Or if you send me a couple of examples, maybe it's just the same
> > pattern over and over,..
>
> Well, the 888 occurences I see are already 'unique' occurences
> (in the sense that the warning is from a distinct file+position).
> I'm adding in attachment the extract of my test logs (but it is
> on v5.9-rc1 so it's maybe not much usefull). I ddn't investigated
> anything, just checked a few case to see that it was a genuine
> occurrence.
Sorry, I was thinking about the nested ones and sent the wrong.
Here are the top entries for sizeof():
66 ./include/linux/filter.h:752:16: warning: using sizeof on a flexible structure
48 crypto/gcm.c:547:17: warning: using sizeof on a flexible structure
48 crypto/authencesn.c:357:17: warning: using sizeof on a flexible structure
48 crypto/authenc.c:339:17: warning: using sizeof on a flexible structure
44 ./include/linux/ihex.h:26:38: warning: using sizeof on a flexible structure
30 drivers/crypto/chelsio/chcr_algo.c:793:32: warning: using sizeof on a flexible structure
29 ./include/crypto/skcipher.h:518:31: warning: using sizeof on a flexible structure
27 ./include/linux/can/dev.h:100:13: warning: using sizeof on a flexible structure
24 net/mac80211/tdls.c:874:32: warning: using sizeof on a flexible structure
24 net/ipv6/ndisc.c:1662:18: warning: using sizeof on a flexible structure
24 drivers/tty/tty_buffer.c:352:28: warning: using sizeof on a flexible structure
24 drivers/tty/tty_buffer.c:316:28: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:972:25: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:968:32: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:961:29: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:905:25: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:897:29: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:760:49: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:756:55: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:747:62: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:738:49: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:729:53: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:577:33: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:559:39: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:554:41: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:404:29: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:1134:33: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:1118:55: warning: using sizeof on a flexible structure
23 net/netfilter/ipset/ip_set_hash_gen.h:1114:51: warning: using sizeof on a flexible structure
20 fs/proc/inode.c:110:9: warning: using sizeof on a flexible structure
20 fs/proc/inode.c:109:17: warning: using sizeof on a flexible structure
20 fs/proc/generic.c:425:29: warning: using sizeof on a flexible structure
18 net/ipv4/tcp_output.c:1241:28: warning: using sizeof on a flexible structure
18 net/core/net-sysfs.c:769:23: warning: using sizeof on a flexible structure
17 ./include/linux/ihex.h:52:50: warning: using sizeof on a flexible structure
16 fs/proc/inode.c:107:35: warning: using sizeof on a flexible structure
16 ./include/crypto/skcipher.h:496:23: warning: using sizeof on a flexible structure
15 mm/percpu.c:2259:21: warning: using sizeof on a flexible structure
14 drivers/net/ethernet/chelsio/cxgb4/cudbg_lib.h:281:27: warning: using sizeof on a flexible structure
13 drivers/net/wireguard/messages.h:117:34: warning: using sizeof on a flexible structure
13 ./include/crypto/hash.h:594:23: warning: using sizeof on a flexible structure
12 net/netfilter/x_tables.c:780:21: warning: using sizeof on a flexible structure
12 net/netfilter/x_tables.c:1157:21: warning: using sizeof on a flexible structure
12 net/netfilter/ipset/ip_set_hash_gen.h:143:51: warning: using sizeof on a flexible structure
12 net/netfilter/ipset/ip_set_hash_gen.h:139:29: warning: using sizeof on a flexible structure
12 net/mac80211/iface.c:1829:28: warning: using sizeof on a flexible structure
12 net/core/skbuff.c:6188:26: warning: using sizeof on a flexible structure
12 net/core/skbuff.c:6146:39: warning: using sizeof on a flexible structure
12 net/core/skbuff.c:4214:16: warning: using sizeof on a flexible structure
12 net/core/bpf_sk_storage.c:666:32: warning: using sizeof on a flexible structure
12 net/core/bpf_sk_storage.c:1081:9: warning: using sizeof on a flexible structure
12 kernel/module.c:1601:19: warning: using sizeof on a flexible structure
12 kernel/bpf/core.c:881:16: warning: using sizeof on a flexible structure
12 drivers/staging/greybus/sdio.c:136:20: warning: using sizeof on a flexible structure
12 drivers/infiniband/hw/cxgb4/provider.c:278:31: warning: using sizeof on a flexible structure
12 drivers/gpu/drm/drm_managed.c:92:13: warning: using sizeof on a flexible structure
12 drivers/crypto/picoxcell_crypto.c:711:17: warning: using sizeof on a flexible structure
12 crypto/cmac.c:271:17: warning: using sizeof on a flexible structure
12 crypto/cmac.c:266:17: warning: using sizeof on a flexible structure
12 crypto/chacha20poly1305.c:528:17: warning: using sizeof on a flexible structure
12 crypto/adiantum.c:429:23: warning: using sizeof on a flexible structure
11 ./include/uapi/linux/bcache.h:101:17: warning: using sizeof on a flexible structure
11 ./include/crypto/aead.h:414:23: warning: using sizeof on a flexible structure
10 drivers/infiniband/sw/rxe/rxe.h:76:9: warning: using sizeof on a flexible structure
10 drivers/base/devres.c:95:13: warning: using sizeof on a flexible structure
10 ./include/rdma/rdmavt_qp.h:535:39: warning: using sizeof on a flexible structure
10 ./include/rdma/ib_verbs.h:583:25: warning: using sizeof on a flexible structure
10 ./include/crypto/hash.h:990:26: warning: using sizeof on a flexible structure
10 ./include/crypto/akcipher.h:196:23: warning: using sizeof on a flexible structure
Less frequent ones removed. There is a lot with a single occurence
mostly in drivers/.
-- Luc