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\ | ^~~~ fs/bcachefs/bcachefs_format.h:912:1: note: in expansion of macro 'LE64_BITMASK' 912 | LE64_BITMASK(BCH_MEMBER_REPLACEMENT, struct bch_member, flags[0], 10, 14) | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:912:14: warning: 'BCH_MEMBER_REPLACEMENT_BITS' defined but not used [-Wunused-const-variable=] 912 | LE64_BITMASK(BCH_MEMBER_REPLACEMENT, struct bch_member, flags[0], 10, 14) | ^~~~~~~~~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:85:25: note: in definition of macro 'LE_BITMASK' 85 | static const unsigned name##_BITS = (end - offset); \ | ^~~~ fs/bcachefs/bcachefs_format.h:912:1: note: in expansion of macro 'LE64_BITMASK' 912 | LE64_BITMASK(BCH_MEMBER_REPLACEMENT, struct bch_member, flags[0], 10, 14) | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:912:14: warning: 'BCH_MEMBER_REPLACEMENT_OFFSET' defined but not used [-Wunused-const-variable=] 912 | LE64_BITMASK(BCH_MEMBER_REPLACEMENT, struct bch_member, flags[0], 10, 14) | ^~~~~~~~~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:84:25: note: in definition of macro 'LE_BITMASK' 84 | static const unsigned name##_OFFSET = offset; \ | ^~~~ fs/bcachefs/bcachefs_format.h:912:1: note: in expansion of macro 'LE64_BITMASK' 912 | LE64_BITMASK(BCH_MEMBER_REPLACEMENT, struct bch_member, flags[0], 10, 14) | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:910:14: warning: 'BCH_MEMBER_STATE_MAX' defined but not used [-Wunused-const-variable=] 910 | LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4) | ^~~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:86:25: note: in definition of macro 'LE_BITMASK' 86 | static const __u##_bits name##_MAX = (1ULL << (end - offset)) - 1; \ | ^~~~ fs/bcachefs/bcachefs_format.h:910:1: note: in expansion of macro 'LE64_BITMASK' 910 | LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4) | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:910:14: warning: 'BCH_MEMBER_STATE_BITS' defined but not used [-Wunused-const-variable=] 910 | LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4) | ^~~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:85:25: note: in definition of macro 'LE_BITMASK' 85 | static const unsigned name##_BITS = (end - offset); \ | ^~~~ fs/bcachefs/bcachefs_format.h:910:1: note: in expansion of macro 'LE64_BITMASK' 910 | LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4) | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:910:14: warning: 'BCH_MEMBER_STATE_OFFSET' defined but not used [-Wunused-const-variable=] 910 | LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4) | ^~~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:84:25: note: in definition of macro 'LE_BITMASK' 84 | static const unsigned name##_OFFSET = offset; \ | ^~~~ fs/bcachefs/bcachefs_format.h:910:1: note: in expansion of macro 'LE64_BITMASK' 910 | LE64_BITMASK(BCH_MEMBER_STATE, struct bch_member, flags[0], 0, 4) | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:757:14: warning: 'INODE_NR_FIELDS_MAX' defined but not used [-Wunused-const-variable=] 757 | LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32); | ^~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:86:25: note: in definition of macro 'LE_BITMASK' 86 | static const __u##_bits name##_MAX = (1ULL << (end - offset)) - 1; \ | ^~~~ fs/bcachefs/bcachefs_format.h:757:1: note: in expansion of macro 'LE32_BITMASK' 757 | LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32); | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:757:14: warning: 'INODE_NR_FIELDS_BITS' defined but not used [-Wunused-const-variable=] 757 | LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32); | ^~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:85:25: note: in definition of macro 'LE_BITMASK' 85 | static const unsigned name##_BITS = (end - offset); \ | ^~~~ fs/bcachefs/bcachefs_format.h:757:1: note: in expansion of macro 'LE32_BITMASK' 757 | LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32); | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:757:14: warning: 'INODE_NR_FIELDS_OFFSET' defined but not used [-Wunused-const-variable=] 757 | LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32); | ^~~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:84:25: note: in definition of macro 'LE_BITMASK' 84 | static const unsigned name##_OFFSET = offset; \ | ^~~~ fs/bcachefs/bcachefs_format.h:757:1: note: in expansion of macro 'LE32_BITMASK' 757 | LE32_BITMASK(INODE_NR_FIELDS, struct bch_inode, bi_flags, 24, 32); | ^~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:756:14: warning: 'INODE_STR_HASH_MAX' defined but not used [-Wunused-const-variable=] 756 | LE32_BITMASK(INODE_STR_HASH, struct bch_inode, bi_flags, 20, 24); | ^~~~~~~~~~~~~~ fs/bcachefs/bcachefs_format.h:86:25: note: in definition of macro 'LE_BITMASK' 86 | static const __u##_bits name##_MAX = (1ULL << (end - offset)) - 1; \ | ^~~~ fs/bcachefs/bcachefs_format.h:756:1: note: in expansion of macro 'LE32_BITMASK' 756 | LE32_BITMASK(INODE_STR_HASH, struct bch_inode, bi_flags, 20, 24); | ^~~~~~~~~~~~ In file included from include/linux/string.h:254, from include/linux/bitmap.h:11, from include/linux/cpumask.h:12, from include/linux/smp.h:13, from include/linux/lockdep.h:14, from include/linux/radix-tree.h:14, from include/linux/backing-dev-defs.h:6, from fs/bcachefs/bcachefs.h:182: fs/bcachefs/extents.c: In function 'bch2_bkey_append_ptr': >> include/linux/fortify-string.h:57:33: warning: writing 8 bytes into a region of size 0 [-Wstringop-overflow=] 57 | #define __underlying_memcpy __builtin_memcpy | ^ include/linux/fortify-string.h:648:9: note: in expansion of macro '__underlying_memcpy' 648 | __underlying_##op(p, q, __fortify_size); \ | ^~~~~~~~~~~~~ include/linux/fortify-string.h:693:26: note: in expansion of macro '__fortify_memcpy_chk' 693 | #define memcpy(p, q, s) __fortify_memcpy_chk(p, q, s, \ | ^~~~~~~~~~~~~~~~~~~~ fs/bcachefs/extents.c:235:17: note: in expansion of macro 'memcpy' 235 | memcpy((void *) &k->v + bkey_val_bytes(&k->k), | ^~~~~~ fs/bcachefs/bcachefs_format.h:287:33: note: destination object 'v' of size 0 287 | struct bch_val v; | ^ vim +57 include/linux/fortify-string.h 78a498c3a227f2 Alexander Potapenko 2022-10-24 46 78a498c3a227f2 Alexander Potapenko 2022-10-24 47 #if defined(__SANITIZE_MEMORY__) 78a498c3a227f2 Alexander Potapenko 2022-10-24 48 /* 78a498c3a227f2 Alexander Potapenko 2022-10-24 49 * For KMSAN builds all memcpy/memset/memmove calls should be replaced by the 78a498c3a227f2 Alexander Potapenko 2022-10-24 50 * corresponding __msan_XXX functions. 78a498c3a227f2 Alexander Potapenko 2022-10-24 51 */ 78a498c3a227f2 Alexander Potapenko 2022-10-24 52 #include 78a498c3a227f2 Alexander Potapenko 2022-10-24 53 #define __underlying_memcpy __msan_memcpy 78a498c3a227f2 Alexander Potapenko 2022-10-24 54 #define __underlying_memmove __msan_memmove 78a498c3a227f2 Alexander Potapenko 2022-10-24 55 #define __underlying_memset __msan_memset 78a498c3a227f2 Alexander Potapenko 2022-10-24 56 #else a28a6e860c6cf2 Francis Laniel 2021-02-25 @57 #define __underlying_memcpy __builtin_memcpy a28a6e860c6cf2 Francis Laniel 2021-02-25 58 #define __underlying_memmove __builtin_memmove a28a6e860c6cf2 Francis Laniel 2021-02-25 59 #define __underlying_memset __builtin_memset 78a498c3a227f2 Alexander Potapenko 2022-10-24 60 #endif 78a498c3a227f2 Alexander Potapenko 2022-10-24 61 :::::: The code at line 57 was first introduced by commit :::::: a28a6e860c6cf231cf3c5171c75c342adcd00406 string.h: move fortified functions definitions in a dedicated header. :::::: TO: Francis Laniel :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki