================================================================== BUG: KCSAN: data-race in __follow_mount_rcu.isra.0 / vfs_unlink write to 0xffff8881254c8c00 of 4 bytes by task 9552 on cpu 1: dont_mount include/linux/dcache.h:352 [inline] vfs_unlink+0x267/0x3e0 fs/namei.c:4075 do_unlinkat+0x33f/0x550 fs/namei.c:4137 __do_sys_unlink fs/namei.c:4184 [inline] __se_sys_unlink fs/namei.c:4182 [inline] __x64_sys_unlink+0x38/0x50 fs/namei.c:4182 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881254c8c00 of 4 bytes by task 4029 on cpu 0: managed_dentry_rcu fs/namei.c:1381 [inline] __follow_mount_rcu.isra.0+0x5a/0x330 fs/namei.c:1398 lookup_fast+0x249/0x6e0 fs/namei.c:1700 walk_component+0x73/0x9a0 fs/namei.c:1911 lookup_last fs/namei.c:2391 [inline] path_lookupat.isra.0+0x129/0x2e0 fs/namei.c:2436 filename_lookup+0x145/0x2b0 fs/namei.c:2466 user_path_at_empty+0x47/0x60 fs/namei.c:2746 do_readlinkat+0x89/0x230 fs/stat.c:409 __do_sys_readlink fs/stat.c:442 [inline] __se_sys_readlink fs/stat.c:439 [inline] __x64_sys_readlink+0x4c/0x60 fs/stat.c:439 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 4029 Comm: udevd Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================