https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114217
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/asm-generic/unaligned.h?h=v6.7 is correct except it should not expose get_unaligned/put_unaligned since the undefined code happens way before. The problem is with the btrfs code in btrfs_filldir: ``` static int btrfs_filldir(void *addr, int entries, struct dir_context *ctx) { while (entries--) { struct dir_entry *entry = addr; /// THIS IS BROKEN and causes the -fsanitize=alignment error char *name = (char *)(entry + 1); ctx->pos = get_unaligned(&entry->offset); if (!dir_emit(ctx, name, get_unaligned(&entry->name_len), get_unaligned(&entry->ino), get_unaligned(&entry->type))) return 1; addr += sizeof(struct dir_entry) + get_unaligned(&entry->name_len); ctx->pos++; } return 0; } ``` Added comment on where the error comes from. The get_unaligned macro really should not be used here. What should be used here is an unaligned version of `struct dir_entry` instead.
