Re: [PATCH] ubsan: Implement __ubsan_handle_alignment_assumption

[kernel test robot <lkp@intel.com>]

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Hi Nathan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on 7c53f6b671f4aba70ff15e1b05148b10d58c2837]

url:    https://github.com/0day-ci/linux/commits/Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
base:    7c53f6b671f4aba70ff15e1b05148b10d58c2837
config: arm64-randconfig-r031-20210112 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 32bcfcda4e28375e5a85268d2acfabcfcc011abf)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/775adad26a60878926c0ee6cd460a1375bbe51e6
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Nathan-Chancellor/ubsan-Implement-__ubsan_handle_alignment_assumption/20210113-055714
        git checkout 775adad26a60878926c0ee6cd460a1375bbe51e6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   lib/ubsan.c:192:6: warning: no previous prototype for function '__ubsan_handle_add_overflow' [-Wmissing-prototypes]
   void __ubsan_handle_add_overflow(void *data,
        ^
   lib/ubsan.c:192:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_add_overflow(void *data,
   ^
   static 
   lib/ubsan.c:200:6: warning: no previous prototype for function '__ubsan_handle_sub_overflow' [-Wmissing-prototypes]
   void __ubsan_handle_sub_overflow(void *data,
        ^
   lib/ubsan.c:200:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_sub_overflow(void *data,
   ^
   static 
   lib/ubsan.c:207:6: warning: no previous prototype for function '__ubsan_handle_mul_overflow' [-Wmissing-prototypes]
   void __ubsan_handle_mul_overflow(void *data,
        ^
   lib/ubsan.c:207:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_mul_overflow(void *data,
   ^
   static 
   lib/ubsan.c:214:6: warning: no previous prototype for function '__ubsan_handle_negate_overflow' [-Wmissing-prototypes]
   void __ubsan_handle_negate_overflow(void *_data, void *old_val)
        ^
   lib/ubsan.c:214:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_negate_overflow(void *_data, void *old_val)
   ^
   static 
   lib/ubsan.c:234:6: warning: no previous prototype for function '__ubsan_handle_divrem_overflow' [-Wmissing-prototypes]
   void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)
        ^
   lib/ubsan.c:234:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_divrem_overflow(void *_data, void *lhs, void *rhs)
   ^
   static 
   lib/ubsan.c:315:6: warning: no previous prototype for function '__ubsan_handle_type_mismatch' [-Wmissing-prototypes]
   void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
        ^
   lib/ubsan.c:315:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_type_mismatch(struct type_mismatch_data *data,
   ^
   static 
   lib/ubsan.c:329:6: warning: no previous prototype for function '__ubsan_handle_type_mismatch_v1' [-Wmissing-prototypes]
   void __ubsan_handle_type_mismatch_v1(void *_data, void *ptr)
        ^
   lib/ubsan.c:329:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_type_mismatch_v1(void *_data, void *ptr)
   ^
   static 
   lib/ubsan.c:343:6: warning: no previous prototype for function '__ubsan_handle_out_of_bounds' [-Wmissing-prototypes]
   void __ubsan_handle_out_of_bounds(void *_data, void *index)
        ^
   lib/ubsan.c:343:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_out_of_bounds(void *_data, void *index)
   ^
   static 
   lib/ubsan.c:360:6: warning: no previous prototype for function '__ubsan_handle_shift_out_of_bounds' [-Wmissing-prototypes]
   void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
        ^
   lib/ubsan.c:360:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_shift_out_of_bounds(void *_data, void *lhs, void *rhs)
   ^
   static 
   lib/ubsan.c:402:6: warning: no previous prototype for function '__ubsan_handle_builtin_unreachable' [-Wmissing-prototypes]
   void __ubsan_handle_builtin_unreachable(void *_data)
        ^
   lib/ubsan.c:402:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_builtin_unreachable(void *_data)
   ^
   static 
   lib/ubsan.c:412:6: warning: no previous prototype for function '__ubsan_handle_load_invalid_value' [-Wmissing-prototypes]
   void __ubsan_handle_load_invalid_value(void *_data, void *val)
        ^
   lib/ubsan.c:412:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_load_invalid_value(void *_data, void *val)
   ^
   static 
>> lib/ubsan.c:431:6: warning: no previous prototype for function '__ubsan_handle_alignment_assumption' [-Wmissing-prototypes]
   void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
        ^
   lib/ubsan.c:431:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,
   ^
   static 
   12 warnings generated.


vim +/__ubsan_handle_alignment_assumption +431 lib/ubsan.c

   411	
 > 412	void __ubsan_handle_load_invalid_value(void *_data, void *val)
   413	{
   414		struct invalid_value_data *data = _data;
   415		char val_str[VALUE_LENGTH];
   416	
   417		if (suppress_report(&data->location))
   418			return;
   419	
   420		ubsan_prologue(&data->location, "invalid-load");
   421	
   422		val_to_string(val_str, sizeof(val_str), data->type, val);
   423	
   424		pr_err("load of value %s is not a valid value for type %s\n",
   425			val_str, data->type->type_name);
   426	
   427		ubsan_epilogue();
   428	}
   429	EXPORT_SYMBOL(__ubsan_handle_load_invalid_value);
   430	
 > 431	void __ubsan_handle_alignment_assumption(void *_data, unsigned long ptr,

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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