* [PATCH] coccinelle: api: add kvmalloc script @ 2020-08-03 10:56 ` Denis Efremov 0 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-08-03 10:56 UTC (permalink / raw) To: Julia Lawall; +Cc: Denis Efremov, cocci, linux-kernel Suggest kvmalloc instead of opencoded kmalloc && vmalloc condition. Signed-off-by: Denis Efremov <efremov@linux.com> --- If coccinelle fails with "Segmentation fault" during analysis, then one needs to increase stack limit, e.g. ulimit -s 32767. Current, I've sent only one patch for this rule and will send the rest after the merge window. https://lkml.org/lkml/2020/7/31/986 scripts/coccinelle/api/kvmalloc.cocci | 127 ++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..76d6aeab7c09 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find conditions in code for kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@opportunity depends on !patch@ +expression E, E1, size; +position p; +@@ + +( +* if (\(size <= E1\|size < E1\|size == E1\|size > E1\) || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... when != E = E1 + when != size = E1 + when any +* if (\(!E\|E == NULL\))@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@depends on patch@ +expression E, E1, flags, size, node; +identifier x; +type T; +@@ + +( +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (\(!E\|E == NULL\)) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (\(!x\|x == NULL\)) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (\(!E\|E == NULL\)) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (\(!x\|x == NULL\)) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!E\|E == NULL\)) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!x\|x == NULL\)) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!E\|E == NULL\)) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!x\|x == NULL\)) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +) + +@script: python depends on report@ +p << opportunity.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on org@ +p << opportunity.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc") -- 2.26.2 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [Cocci] [PATCH] coccinelle: api: add kvmalloc script @ 2020-08-03 10:56 ` Denis Efremov 0 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-08-03 10:56 UTC (permalink / raw) To: Julia Lawall; +Cc: cocci, linux-kernel Suggest kvmalloc instead of opencoded kmalloc && vmalloc condition. Signed-off-by: Denis Efremov <efremov@linux.com> --- If coccinelle fails with "Segmentation fault" during analysis, then one needs to increase stack limit, e.g. ulimit -s 32767. Current, I've sent only one patch for this rule and will send the rest after the merge window. https://lkml.org/lkml/2020/7/31/986 scripts/coccinelle/api/kvmalloc.cocci | 127 ++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..76d6aeab7c09 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find conditions in code for kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@opportunity depends on !patch@ +expression E, E1, size; +position p; +@@ + +( +* if (\(size <= E1\|size < E1\|size == E1\|size > E1\) || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... when != E = E1 + when != size = E1 + when any +* if (\(!E\|E == NULL\))@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@depends on patch@ +expression E, E1, flags, size, node; +identifier x; +type T; +@@ + +( +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (\(!E\|E == NULL\)) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (\(!x\|x == NULL\)) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (\(!E\|E == NULL\)) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (\(!x\|x == NULL\)) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!E\|E == NULL\)) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!x\|x == NULL\)) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- if (\(size <= E1\|size < E1\|size == E1\|size > E1\)) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!E\|E == NULL\)) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (\(!x\|x == NULL\)) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +) + +@script: python depends on report@ +p << opportunity.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on org@ +p << opportunity.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc") -- 2.26.2 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v2] coccinelle: api: add kvmalloc script 2020-08-03 10:56 ` [Cocci] " Denis Efremov @ 2020-08-03 18:57 ` Denis Efremov -1 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-08-03 18:57 UTC (permalink / raw) To: Julia Lawall; +Cc: Denis Efremov, cocci, linux-kernel Suggest kvmalloc instead of opencoded kmalloc && vmalloc condition. Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - binary operator cmp added - NULL comparisions simplified - "T x" case added to !patch mode scripts/coccinelle/api/kvmalloc.cocci | 142 ++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..20b22e3d0f74 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find if/else condition with kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@opportunity depends on !patch@ +expression E, E1, size; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +position p; +@@ + +( +* if (size cmp E1 || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... when != E = E1 + when != size = E1 + when any +* if (E == NULL)@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...); + ... when != x = E1 + when != size = E1 + when any +* if (x == NULL)@p { + ... +* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@depends on patch@ +expression E, E1, flags, size, node; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +@@ + +( +- if (size cmp E1) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- if (size cmp E1) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- if (size cmp E1) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +) + +@script: python depends on report@ +p << opportunity.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on org@ +p << opportunity.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc") -- 2.26.2 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [Cocci] [PATCH v2] coccinelle: api: add kvmalloc script @ 2020-08-03 18:57 ` Denis Efremov 0 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-08-03 18:57 UTC (permalink / raw) To: Julia Lawall; +Cc: cocci, linux-kernel Suggest kvmalloc instead of opencoded kmalloc && vmalloc condition. Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - binary operator cmp added - NULL comparisions simplified - "T x" case added to !patch mode scripts/coccinelle/api/kvmalloc.cocci | 142 ++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..20b22e3d0f74 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,142 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find if/else condition with kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@opportunity depends on !patch@ +expression E, E1, size; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +position p; +@@ + +( +* if (size cmp E1 || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... when != E = E1 + when != size = E1 + when any +* if (E == NULL)@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...); + ... when != x = E1 + when != size = E1 + when any +* if (x == NULL)@p { + ... +* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@depends on patch@ +expression E, E1, flags, size, node; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +@@ + +( +- if (size cmp E1) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- if (size cmp E1) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- if (size cmp E1) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +) + +@script: python depends on report@ +p << opportunity.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on org@ +p << opportunity.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc") -- 2.26.2 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v3] coccinelle: api: add kvmalloc script 2020-08-03 10:56 ` [Cocci] " Denis Efremov @ 2020-08-04 6:32 ` Denis Efremov -1 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-08-04 6:32 UTC (permalink / raw) To: Julia Lawall; +Cc: Denis Efremov, cocci, linux-kernel Suggest kvmalloc, kvfree instead of opencoded patterns. Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - binary operator cmp added - NULL comparisions simplified - "T x" case added to !patch mode Changes in v3: - kvfree rules added scripts/coccinelle/api/kvmalloc.cocci | 188 ++++++++++++++++++++++++++ 1 file changed, 188 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..2cb9281cc092 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find if/else condition with kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. Same for kvfree. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@initialize:python@ +@@ +filter = frozenset(['kvfree']) + +def relevant(p): + return not (filter & {el.current_element for el in p}) + +@kvmalloc depends on !patch@ +expression E, E1, size; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +position p; +@@ + +( +* if (size cmp E1 || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... when != E = E1 + when != size = E1 + when any +* if (E == NULL)@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...); + ... when != x = E1 + when != size = E1 + when any +* if (x == NULL)@p { + ... +* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@kvfree depends on !patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +* if (is_vmalloc_addr(E))@p { + ... +* vfree(E) + ... + } else { + ... when != krealloc(E, ...) + when any +* \(kfree\|kzfree\)(E) + ... + } + +@depends on patch@ +expression E, E1, flags, size, node; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +@@ + +( +- if (size cmp E1) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- if (size cmp E1) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- if (size cmp E1) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +) + +@depends on patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +- if (is_vmalloc_addr(E))@p +- vfree(E); +- else +- kfree(E); ++ kvfree(E); + +@script: python depends on report@ +p << kvmalloc.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on org@ +p << kvmalloc.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on report@ +p << kvfree.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvfree") + +@script: python depends on org@ +p << kvfree.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvfree") -- 2.26.2 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [Cocci] [PATCH v3] coccinelle: api: add kvmalloc script @ 2020-08-04 6:32 ` Denis Efremov 0 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-08-04 6:32 UTC (permalink / raw) To: Julia Lawall; +Cc: cocci, linux-kernel Suggest kvmalloc, kvfree instead of opencoded patterns. Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - binary operator cmp added - NULL comparisions simplified - "T x" case added to !patch mode Changes in v3: - kvfree rules added scripts/coccinelle/api/kvmalloc.cocci | 188 ++++++++++++++++++++++++++ 1 file changed, 188 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..2cb9281cc092 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find if/else condition with kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. Same for kvfree. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@initialize:python@ +@@ +filter = frozenset(['kvfree']) + +def relevant(p): + return not (filter & {el.current_element for el in p}) + +@kvmalloc depends on !patch@ +expression E, E1, size; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +position p; +@@ + +( +* if (size cmp E1 || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...) + ... when != E = E1 + when != size = E1 + when any +* if (E == NULL)@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\)(..., size, ...); + ... when != x = E1 + when != size = E1 + when any +* if (x == NULL)@p { + ... +* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@kvfree depends on !patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +* if (is_vmalloc_addr(E))@p { + ... +* vfree(E) + ... + } else { + ... when != krealloc(E, ...) + when any +* \(kfree\|kzfree\)(E) + ... + } + +@depends on patch@ +expression E, E1, flags, size, node; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +@@ + +( +- if (size cmp E1) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- if (size cmp E1) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- if (size cmp E1) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +) + +@depends on patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +- if (is_vmalloc_addr(E))@p +- vfree(E); +- else +- kfree(E); ++ kvfree(E); + +@script: python depends on report@ +p << kvmalloc.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on org@ +p << kvmalloc.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvmalloc") + +@script: python depends on report@ +p << kvfree.p; +@@ + +coccilib.report.print_report(p[0], "WARNING: opportunity for kvfree") + +@script: python depends on org@ +p << kvfree.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING: opportunity for kvfree") -- 2.26.2 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH v4] coccinelle: api: add kvmalloc script 2020-08-04 6:32 ` [Cocci] " Denis Efremov @ 2020-09-30 16:00 ` Denis Efremov -1 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-09-30 16:00 UTC (permalink / raw) To: julia.lawall; +Cc: Denis Efremov, cocci, linux-kernel Suggest kvmalloc, kvfree instead of opencoded patterns. Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - binary operator cmp added - NULL comparisions simplified - "T x" case added to !patch mode Changes in v3: - kvfree rules added Changes in v4: - pattern updated to match only GFP_KERNEL/__GFP_NOWARN flags to avoid possible false-positives All patches are sent: [1] https://lore.kernel.org/patchwork/patch/1296428/ [2] https://lore.kernel.org/patchwork/patch/1296636/ [3] https://lore.kernel.org/patchwork/patch/1282895/ [4] https://lore.kernel.org/patchwork/patch/1296631/ scripts/coccinelle/api/kvmalloc.cocci | 256 ++++++++++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..c30dab718a49 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,256 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find if/else condition with kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. Same for kvfree. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@initialize:python@ +@@ +filter = frozenset(['kvfree']) + +def relevant(p): + return not (filter & {el.current_element for el in p}) + +@kvmalloc depends on !patch@ +expression E, E1, size; +identifier flags; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +position p; +@@ + +( +* if (size cmp E1 || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\) +* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\) +* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...) + ... when != E = E1 + when != size = E1 + when any +* if (E == NULL)@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\) +* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...); + ... when != x = E1 + when != size = E1 + when any +* if (x == NULL)@p { + ... +* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@kvfree depends on !patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +* if (is_vmalloc_addr(E))@p { + ... +* vfree(E) + ... + } else { + ... when != krealloc(E, ...) + when any +* \(kfree\|kzfree\)(E) + ... + } + +@depends on patch@ +expression E, E1, size, node; +binary operator cmp = {<=, <, ==, >, >=}; +identifier flags, x; +type T; +@@ + +( +- if (size cmp E1) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- if (size cmp E1) +- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, GFP_KERNEL); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, GFP_KERNEL); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- T x = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, GFP_KERNEL); +| +- if (size cmp E1) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- if (size cmp E1) +- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, GFP_KERNEL); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, GFP_KERNEL); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- T x = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, GFP_KERNEL); +| +- if (size cmp E1) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, GFP_KERNEL, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, GFP_KERNEL, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, GFP_KERNEL, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, GFP_KERNEL, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, GFP_KERNEL, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, GFP_KERNEL, node); +) + +@depends on patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +- if (is_vmalloc_addr(E))@p +- vfree(E); +- else +- kfree(E); ++ kvfree(E); + +@script: python depends on report@ +p << kvmalloc.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for kvmalloc") + +@script: python depends on org@ +p << kvmalloc.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for kvmalloc") + +@script: python depends on report@ +p << kvfree.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for kvfree") + +@script: python depends on org@ +p << kvfree.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for kvfree") -- 2.26.2 ^ permalink raw reply related [flat|nested] 10+ messages in thread
* [Cocci] [PATCH v4] coccinelle: api: add kvmalloc script @ 2020-09-30 16:00 ` Denis Efremov 0 siblings, 0 replies; 10+ messages in thread From: Denis Efremov @ 2020-09-30 16:00 UTC (permalink / raw) To: julia.lawall; +Cc: cocci, linux-kernel Suggest kvmalloc, kvfree instead of opencoded patterns. Signed-off-by: Denis Efremov <efremov@linux.com> --- Changes in v2: - binary operator cmp added - NULL comparisions simplified - "T x" case added to !patch mode Changes in v3: - kvfree rules added Changes in v4: - pattern updated to match only GFP_KERNEL/__GFP_NOWARN flags to avoid possible false-positives All patches are sent: [1] https://lore.kernel.org/patchwork/patch/1296428/ [2] https://lore.kernel.org/patchwork/patch/1296636/ [3] https://lore.kernel.org/patchwork/patch/1282895/ [4] https://lore.kernel.org/patchwork/patch/1296631/ scripts/coccinelle/api/kvmalloc.cocci | 256 ++++++++++++++++++++++++++ 1 file changed, 256 insertions(+) create mode 100644 scripts/coccinelle/api/kvmalloc.cocci diff --git a/scripts/coccinelle/api/kvmalloc.cocci b/scripts/coccinelle/api/kvmalloc.cocci new file mode 100644 index 000000000000..c30dab718a49 --- /dev/null +++ b/scripts/coccinelle/api/kvmalloc.cocci @@ -0,0 +1,256 @@ +// SPDX-License-Identifier: GPL-2.0-only +/// +/// Find if/else condition with kmalloc/vmalloc calls. +/// Suggest to use kvmalloc instead. Same for kvfree. +/// +// Confidence: High +// Copyright: (C) 2020 Denis Efremov ISPRAS +// Options: --no-includes --include-headers +// + +virtual patch +virtual report +virtual org +virtual context + +@initialize:python@ +@@ +filter = frozenset(['kvfree']) + +def relevant(p): + return not (filter & {el.current_element for el in p}) + +@kvmalloc depends on !patch@ +expression E, E1, size; +identifier flags; +binary operator cmp = {<=, <, ==, >, >=}; +identifier x; +type T; +position p; +@@ + +( +* if (size cmp E1 || ...)@p { + ... +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\) +* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...) + ... + } else { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* E = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\) +* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...) + ... when != E = E1 + when != size = E1 + when any +* if (E == NULL)@p { + ... +* E = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +| +* T x = \(kmalloc\|kzalloc\|kcalloc\|kmalloc_node\|kzalloc_node\| +* kmalloc_array\|kmalloc_array_node\|kcalloc_node\) +* (..., size, \(flags\|GFP_KERNEL\|\(GFP_KERNEL\|flags\)|__GFP_NOWARN\), ...); + ... when != x = E1 + when != size = E1 + when any +* if (x == NULL)@p { + ... +* x = \(vmalloc\|vzalloc\|vmalloc_node\|vzalloc_node\)(..., size, ...) + ... + } +) + +@kvfree depends on !patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +* if (is_vmalloc_addr(E))@p { + ... +* vfree(E) + ... + } else { + ... when != krealloc(E, ...) + when any +* \(kfree\|kzfree\)(E) + ... + } + +@depends on patch@ +expression E, E1, size, node; +binary operator cmp = {<=, <, ==, >, >=}; +identifier flags, x; +type T; +@@ + +( +- if (size cmp E1) +- E = kmalloc(size, flags); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- if (size cmp E1) +- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- else +- E = vmalloc(size); ++ E = kvmalloc(size, GFP_KERNEL); +| +- E = kmalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, flags); +| +- E = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (E == NULL) +- E = vmalloc(size); ++ E = kvmalloc(size, GFP_KERNEL); +| +- T x = kmalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, flags); +| +- T x = kmalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (x == NULL) +- x = vmalloc(size); ++ T x = kvmalloc(size, GFP_KERNEL); +| +- if (size cmp E1) +- E = kzalloc(size, flags); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- if (size cmp E1) +- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- else +- E = vzalloc(size); ++ E = kvzalloc(size, GFP_KERNEL); +| +- E = kzalloc(size, flags | __GFP_NOWARN); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, flags); +| +- E = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (E == NULL) +- E = vzalloc(size); ++ E = kvzalloc(size, GFP_KERNEL); +| +- T x = kzalloc(size, flags | __GFP_NOWARN); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, flags); +| +- T x = kzalloc(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\)); +- if (x == NULL) +- x = vzalloc(size); ++ T x = kvzalloc(size, GFP_KERNEL); +| +- if (size cmp E1) +- E = kmalloc_node(size, flags, node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- else +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, GFP_KERNEL, node); +| +- E = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, flags, node); +| +- E = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (E == NULL) +- E = vmalloc_node(size, node); ++ E = kvmalloc_node(size, GFP_KERNEL, node); +| +- T x = kmalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, flags, node); +| +- T x = kmalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (x == NULL) +- x = vmalloc_node(size, node); ++ T x = kvmalloc_node(size, GFP_KERNEL, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, flags, node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- if (size cmp E1) +- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- else +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, GFP_KERNEL, node); +| +- E = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, flags, node); +| +- E = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (E == NULL) +- E = vzalloc_node(size, node); ++ E = kvzalloc_node(size, GFP_KERNEL, node); +| +- T x = kvzalloc_node(size, flags | __GFP_NOWARN, node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, flags, node); +| +- T x = kvzalloc_node(size, \(GFP_KERNEL\|GFP_KERNEL|__GFP_NOWARN\), node); +- if (x == NULL) +- x = vzalloc_node(size, node); ++ T x = kvzalloc_node(size, GFP_KERNEL, node); +) + +@depends on patch@ +expression E; +position p : script:python() { relevant(p) }; +@@ + +- if (is_vmalloc_addr(E))@p +- vfree(E); +- else +- kfree(E); ++ kvfree(E); + +@script: python depends on report@ +p << kvmalloc.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for kvmalloc") + +@script: python depends on org@ +p << kvmalloc.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for kvmalloc") + +@script: python depends on report@ +p << kvfree.p; +@@ + +coccilib.report.print_report(p[0], "WARNING opportunity for kvfree") + +@script: python depends on org@ +p << kvfree.p; +@@ + +coccilib.org.print_todo(p[0], "WARNING opportunity for kvfree") -- 2.26.2 _______________________________________________ Cocci mailing list Cocci@systeme.lip6.fr https://systeme.lip6.fr/mailman/listinfo/cocci ^ permalink raw reply related [flat|nested] 10+ messages in thread
[parent not found: <12b09b8f-7c73-1827-8bf3-63e6041b63fd@web.de>]
* Re: [PATCH v3] coccinelle: api: add kvmalloc script [not found] <12b09b8f-7c73-1827-8bf3-63e6041b63fd@web.de> @ 2020-08-04 7:49 ` Julia Lawall 0 siblings, 0 replies; 10+ messages in thread From: Julia Lawall @ 2020-08-04 7:49 UTC (permalink / raw) To: Markus Elfring Cc: Denis Efremov, Coccinelle, Gilles Muller, Julia Lawall, Masahiro Yamada, Michal Marek, Nicolas Palix, linux-kernel, kernel-janitors On Tue, 4 Aug 2020, Markus Elfring wrote: > > Changes in v3: > > - kvfree rules added > > I find it interesting to you found such an addition needed for this SmPL script. > I imagine that it can be helpful to support such a source code search by > a separate script for the semantic patch language. > > I am curious if my patch review comments for the second version got also a bit > of your software development attention. > > Another implementation detail is relevant for further clarification. > The SmPL rules for patch generation differ in search functionality > which is provided for other operation modes. > Can these deviations influence the confidence level? I see no useful information in this review, nor in the v2 review. julia ^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH v3] coccinelle: api: add kvmalloc script @ 2020-08-04 7:49 ` Julia Lawall 0 siblings, 0 replies; 10+ messages in thread From: Julia Lawall @ 2020-08-04 7:49 UTC (permalink / raw) To: Markus Elfring Cc: Michal Marek, Gilles Muller, kernel-janitors, Nicolas Palix, linux-kernel, Coccinelle On Tue, 4 Aug 2020, Markus Elfring wrote: > > Changes in v3: > > - kvfree rules added > > I find it interesting to you found such an addition needed for this SmPL script. > I imagine that it can be helpful to support such a source code search by > a separate script for the semantic patch language. > > I am curious if my patch review comments for the second version got also a bit > of your software development attention. > > Another implementation detail is relevant for further clarification. > The SmPL rules for patch generation differ in search functionality > which is provided for other operation modes. > Can these deviations influence the confidence level? I see no useful information in this review, nor in the v2 review. julia ^ permalink raw reply [flat|nested] 10+ messages in thread
end of thread, other threads:[~2020-09-30 16:01 UTC | newest]
Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
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2020-08-03 10:56 [PATCH] coccinelle: api: add kvmalloc script Denis Efremov
2020-08-03 10:56 ` [Cocci] " Denis Efremov
2020-08-03 18:57 ` [PATCH v2] " Denis Efremov
2020-08-03 18:57 ` [Cocci] " Denis Efremov
2020-08-04 6:32 ` [PATCH v3] " Denis Efremov
2020-08-04 6:32 ` [Cocci] " Denis Efremov
2020-09-30 16:00 ` [PATCH v4] " Denis Efremov
2020-09-30 16:00 ` [Cocci] " Denis Efremov
[not found] <12b09b8f-7c73-1827-8bf3-63e6041b63fd@web.de>
2020-08-04 7:49 ` [PATCH v3] " Julia Lawall
2020-08-04 7:49 ` Julia Lawall
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