[linux-next:master 4298/4500] include/linux/fortify-string.h:20:29: warning: argument 1 null where non-null expected

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

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   93bf8b946e5f9a0b0c68155597b53fd8ccce2827
commit: 1068f9c7eade6a755a2fe3b60b9941cf44ee2888 [4298/4500] string.h: move fortified functions definitions in a dedicated header.
config: s390-randconfig-r013-20210118 (attached as .config)
compiler: s390-linux-gcc (GCC) 9.3.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=1068f9c7eade6a755a2fe3b60b9941cf44ee2888
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 1068f9c7eade6a755a2fe3b60b9941cf44ee2888
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 

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/zstd/decompress.c:126:12: warning: no previous prototype for 'ZSTD_createDCtx_advanced' [-Wmissing-prototypes]
     126 | ZSTD_DCtx *ZSTD_createDCtx_advanced(ZSTD_customMem customMem)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c:394:8: warning: no previous prototype for 'ZSTD_getcBlockSize' [-Wmissing-prototypes]
     394 | size_t ZSTD_getcBlockSize(const void *src, size_t srcSize, blockProperties_t *bpPtr)
         |        ^~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c:432:8: warning: no previous prototype for 'ZSTD_decodeLiteralsBlock' [-Wmissing-prototypes]
     432 | size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize) /* note : srcSize < BLOCKSIZE */
         |        ^~~~~~~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c:794:8: warning: no previous prototype for 'ZSTD_decodeSeqHeaders' [-Wmissing-prototypes]
     794 | size_t ZSTD_decodeSeqHeaders(ZSTD_DCtx *dctx, int *nbSeqPtr, const void *src, size_t srcSize)
         |        ^~~~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c:1497:8: warning: no previous prototype for 'ZSTD_generateNxBytes' [-Wmissing-prototypes]
    1497 | size_t ZSTD_generateNxBytes(void *dst, size_t dstCapacity, BYTE byte, size_t length)
         |        ^~~~~~~~~~~~~~~~~~~~
   In file included from lib/zstd/decompress.c:35:
   lib/zstd/zstd_internal.h:124:18: warning: 'OF_defaultNormLog' defined but not used [-Wunused-const-variable=]
     124 | static const U32 OF_defaultNormLog = OF_DEFAULTNORMLOG;
         |                  ^~~~~~~~~~~~~~~~~
   lib/zstd/zstd_internal.h:122:18: warning: 'OF_defaultNorm' defined but not used [-Wunused-const-variable=]
     122 | static const S16 OF_defaultNorm[MaxOff + 1] = {1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -1, -1};
         |                  ^~~~~~~~~~~~~~
   lib/zstd/zstd_internal.h:120:18: warning: 'ML_defaultNormLog' defined but not used [-Wunused-const-variable=]
     120 | static const U32 ML_defaultNormLog = ML_DEFAULTNORMLOG;
         |                  ^~~~~~~~~~~~~~~~~
   lib/zstd/zstd_internal.h:117:18: warning: 'ML_defaultNorm' defined but not used [-Wunused-const-variable=]
     117 | static const S16 ML_defaultNorm[MaxML + 1] = {1, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  1,  1,  1,  1,  1,  1, 1,
         |                  ^~~~~~~~~~~~~~
   lib/zstd/zstd_internal.h:113:18: warning: 'LL_defaultNormLog' defined but not used [-Wunused-const-variable=]
     113 | static const U32 LL_defaultNormLog = LL_DEFAULTNORMLOG;
         |                  ^~~~~~~~~~~~~~~~~
   lib/zstd/zstd_internal.h:111:18: warning: 'LL_defaultNorm' defined but not used [-Wunused-const-variable=]
     111 | static const S16 LL_defaultNorm[MaxLL + 1] = {4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 1, 1, 1, 1, 1, -1, -1, -1, -1};
         |                  ^~~~~~~~~~~~~~
   In file included from include/linux/string.h:269,
                    from lib/zstd/mem.h:24,
                    from lib/zstd/bitstream.h:54,
                    from lib/zstd/fse.h:228,
                    from lib/zstd/decompress.c:32:
   In function 'memcpy',
       inlined from 'ZSTD_decompressContinue' at lib/zstd/decompress.c:416:2,
       inlined from 'ZSTD_decompressStream'@lib/zstd/decompress.c:2354:5:
>> include/linux/fortify-string.h:20:29: warning: argument 1 null where non-null expected [-Wnonnull]
      20 | #define __underlying_memcpy __builtin_memcpy
         |                             ^
   include/linux/fortify-string.h:191:9: note: in expansion of macro '__underlying_memcpy'
     191 |  return __underlying_memcpy(p, q, size);
         |         ^~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c: In function 'ZSTD_decompressStream':
   include/linux/fortify-string.h:20:29: note: in a call to built-in function '__builtin_memcpy'
      20 | #define __underlying_memcpy __builtin_memcpy
         |                             ^
   include/linux/fortify-string.h:191:9: note: in expansion of macro '__underlying_memcpy'
     191 |  return __underlying_memcpy(p, q, size);
         |         ^~~~~~~~~~~~~~~~~~~
   In function 'memset',
       inlined from 'ZSTD_decompressContinue' at lib/zstd/decompress.c:426:2,
       inlined from 'ZSTD_decompressStream' at lib/zstd/decompress.c:2354:5:
   include/linux/fortify-string.h:22:29: warning: argument 1 null where non-null expected [-Wnonnull]
      22 | #define __underlying_memset __builtin_memset
         |                             ^
   include/linux/fortify-string.h:175:9: note: in expansion of macro '__underlying_memset'
     175 |  return __underlying_memset(p, c, size);
         |         ^~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c: In function 'ZSTD_decompressStream':
   include/linux/fortify-string.h:22:29: note: in a call to built-in function '__builtin_memset'
      22 | #define __underlying_memset __builtin_memset
         |                             ^
   include/linux/fortify-string.h:175:9: note: in expansion of macro '__underlying_memset'
     175 |  return __underlying_memset(p, c, size);
         |         ^~~~~~~~~~~~~~~~~~~
   In function 'memcpy',
       inlined from 'ZSTD_decompressContinue' at lib/zstd/decompress.c:416:2,
       inlined from 'ZSTD_decompressStream' at lib/zstd/decompress.c:2357:6:
>> include/linux/fortify-string.h:20:29: warning: argument 1 null where non-null expected [-Wnonnull]
      20 | #define __underlying_memcpy __builtin_memcpy
         |                             ^
   include/linux/fortify-string.h:191:9: note: in expansion of macro '__underlying_memcpy'
     191 |  return __underlying_memcpy(p, q, size);
         |         ^~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c: In function 'ZSTD_decompressStream':
   include/linux/fortify-string.h:20:29: note: in a call to built-in function '__builtin_memcpy'
      20 | #define __underlying_memcpy __builtin_memcpy
         |                             ^
   include/linux/fortify-string.h:191:9: note: in expansion of macro '__underlying_memcpy'
     191 |  return __underlying_memcpy(p, q, size);
         |         ^~~~~~~~~~~~~~~~~~~
   In function 'memset',
       inlined from 'ZSTD_decompressContinue' at lib/zstd/decompress.c:426:2,
       inlined from 'ZSTD_decompressStream' at lib/zstd/decompress.c:2357:6:
   include/linux/fortify-string.h:22:29: warning: argument 1 null where non-null expected [-Wnonnull]
      22 | #define __underlying_memset __builtin_memset
         |                             ^
   include/linux/fortify-string.h:175:9: note: in expansion of macro '__underlying_memset'
     175 |  return __underlying_memset(p, c, size);
         |         ^~~~~~~~~~~~~~~~~~~
   lib/zstd/decompress.c: In function 'ZSTD_decompressStream':
   include/linux/fortify-string.h:22:29: note: in a call to built-in function '__builtin_memset'
      22 | #define __underlying_memset __builtin_memset
         |                             ^
   include/linux/fortify-string.h:175:9: note: in expansion of macro '__underlying_memset'
     175 |  return __underlying_memset(p, c, size);
         |         ^~~~~~~~~~~~~~~~~~~


vim +20 include/linux/fortify-string.h

     4	
     5	
     6	#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS)
     7	extern void *__underlying_memchr(const void *p, int c, __kernel_size_t size) __RENAME(memchr);
     8	extern int __underlying_memcmp(const void *p, const void *q, __kernel_size_t size) __RENAME(memcmp);
     9	extern void *__underlying_memcpy(void *p, const void *q, __kernel_size_t size) __RENAME(memcpy);
    10	extern void *__underlying_memmove(void *p, const void *q, __kernel_size_t size) __RENAME(memmove);
    11	extern void *__underlying_memset(void *p, int c, __kernel_size_t size) __RENAME(memset);
    12	extern char *__underlying_strcat(char *p, const char *q) __RENAME(strcat);
    13	extern char *__underlying_strcpy(char *p, const char *q) __RENAME(strcpy);
    14	extern __kernel_size_t __underlying_strlen(const char *p) __RENAME(strlen);
    15	extern char *__underlying_strncat(char *p, const char *q, __kernel_size_t count) __RENAME(strncat);
    16	extern char *__underlying_strncpy(char *p, const char *q, __kernel_size_t size) __RENAME(strncpy);
    17	#else
    18	#define __underlying_memchr	__builtin_memchr
    19	#define __underlying_memcmp	__builtin_memcmp
  > 20	#define __underlying_memcpy	__builtin_memcpy
    21	#define __underlying_memmove	__builtin_memmove
    22	#define __underlying_memset	__builtin_memset
    23	#define __underlying_strcat	__builtin_strcat
    24	#define __underlying_strcpy	__builtin_strcpy
    25	#define __underlying_strlen	__builtin_strlen
    26	#define __underlying_strncat	__builtin_strncat
    27	#define __underlying_strncpy	__builtin_strncpy
    28	#endif
    29	

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

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