tree: https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git testing/warray-bounds head: 8bd0f043b3e94069930bec5cb3fbb5c857748c80 commit: 5f8bd90197ff7ab1cf9f06dd9c594f3636c71297 [1/13] Makefile: Enable -Warray-bounds config: alpha-randconfig-r013-20210415 (attached as .config) compiler: alpha-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/gustavoars/linux.git/commit/?id=5f8bd90197ff7ab1cf9f06dd9c594f3636c71297 git remote add gustavoars-linux https://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux.git git fetch --no-tags gustavoars-linux testing/warray-bounds git checkout 5f8bd90197ff7ab1cf9f06dd9c594f3636c71297 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=alpha
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All warnings (new ones prefixed by >>): In file included from include/linux/string.h:21, from include/linux/bitmap.h:10, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:59, from include/linux/ipc.h:5, from include/uapi/linux/sem.h:5, from include/linux/sem.h:5, from include/linux/compat.h:14, from drivers/ide/ide-ioctls.c:6: In function 'ide_task_ioctl', inlined from 'generic_ide_ioctl' at drivers/ide/ide-ioctls.c:287:10: >> arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset >> [3, 7] from the object at 'cmd' is out of the bounds of referenced subobject >> 'feature' with type 'unsigned char' at offset 1 [-Warray-bounds] 22 | #define memcpy __builtin_memcpy drivers/ide/ide-ioctls.c:213:2: note: in expansion of macro 'memcpy' 213 | memcpy(&cmd.tf.feature, &args[1], 6); | ^~~~~~ >> arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset >> [3, 7] from the object at 'cmd' is out of the bounds of referenced subobject >> 'feature' with type 'unsigned char' at offset 1 [-Warray-bounds] 22 | #define memcpy __builtin_memcpy drivers/ide/ide-ioctls.c:221:2: note: in expansion of macro 'memcpy' 221 | memcpy(&args[1], &cmd.tf.feature, 6); | ^~~~~~ -- In file included from include/linux/string.h:21, from include/linux/bitmap.h:10, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:59, from include/linux/wait.h:9, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from include/linux/highmem.h:5, from include/linux/bio.h:8, from drivers/md/bcache/bcache.h:182, from drivers/md/bcache/alloc.c:64: In function 'pick_data_bucket', inlined from 'bch_alloc_sectors' at drivers/md/bcache/alloc.c:627:15: >> arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset >> [17, 24] from the object at 'alloc' is out of the bounds of referenced >> subobject 'key' with type 'struct bkey' at offset 0 [-Warray-bounds] 22 | #define memcpy __builtin_memcpy include/uapi/linux/bcache.h:109:32: note: in expansion of macro 'memcpy' 109 | #define bkey_copy(_dest, _src) memcpy(_dest, _src, bkey_bytes(_src)) | ^~~~~~ drivers/md/bcache/alloc.c:586:3: note: in expansion of macro 'bkey_copy' 586 | bkey_copy(&ret->key, alloc); | ^~~~~~~~~ -- In file included from include/linux/string.h:21, from include/linux/bitmap.h:10, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/spinlock.h:59, from include/linux/mmzone.h:8, from include/linux/gfp.h:6, from include/linux/umh.h:4, from include/linux/kmod.h:9, from include/linux/module.h:16, from drivers/media/pci/ngene/ngene-core.c:13: drivers/media/pci/ngene/ngene-core.c: In function 'ngene_command_config_free_buf': >> arch/alpha/include/asm/string.h:22:16: warning: '__builtin_memcpy' offset >> [12, 16] from the object at 'com' is out of the bounds of referenced >> subobject 'config' with type 'unsigned char' at offset 10 [-Warray-bounds] 22 | #define memcpy __builtin_memcpy drivers/media/pci/ngene/ngene-core.c:388:2: note: in expansion of macro 'memcpy' 388 | memcpy(&com.cmd.ConfigureBuffers.config, config, 6); | ^~~~~~ vim +22 arch/alpha/include/asm/string.h ^1da177e4c3f415 include/asm-alpha/string.h Linus Torvalds 2005-04-16 21 ^1da177e4c3f415 include/asm-alpha/string.h Linus Torvalds 2005-04-16 @22 #define memcpy __builtin_memcpy ^1da177e4c3f415 include/asm-alpha/string.h Linus Torvalds 2005-04-16 23 :::::: The code at line 22 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torva...@ppc970.osdl.org> :::::: CC: Linus Torvalds <torva...@ppc970.osdl.org> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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