================================================================== BUG: KCSAN: data-race in lookup_fast / vfs_unlink write to 0xffff8881351243c0 of 4 bytes by task 3648 on cpu 0: dont_mount include/linux/dcache.h:348 [inline] vfs_unlink+0x2c6/0x580 fs/namei.c:4152 do_unlinkat+0x278/0x540 fs/namei.c:4218 __do_sys_unlink fs/namei.c:4266 [inline] __se_sys_unlink fs/namei.c:4264 [inline] __x64_sys_unlink+0x2c/0x30 fs/namei.c:4264 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881351243c0 of 4 bytes by task 1438 on cpu 1: d_revalidate fs/namei.c:853 [inline] lookup_fast+0x172/0x360 fs/namei.c:1656 walk_component+0x6d/0x360 fs/namei.c:2016 lookup_last fs/namei.c:2475 [inline] path_lookupat+0x12d/0x3d0 fs/namei.c:2499 filename_lookup+0x130/0x310 fs/namei.c:2528 user_path_at_empty+0x3e/0x110 fs/namei.c:2851 do_readlinkat+0x97/0x210 fs/stat.c:457 __do_sys_readlink fs/stat.c:490 [inline] __se_sys_readlink fs/stat.c:487 [inline] __x64_sys_readlink+0x43/0x50 fs/stat.c:487 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00600008 -> 0x00008008 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1438 Comm: udevd Not tainted 5.17.0-syzkaller-13788-gd0d642a5d365-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================