================================================================== BUG: KCSAN: data-race in __d_instantiate / dput write to 0xffff888133be2e40 of 4 bytes by task 17823 on cpu 0: __d_instantiate+0x2ca/0x3a0 fs/dcache.c:2010 d_instantiate+0x55/0x80 fs/dcache.c:2035 shmem_symlink+0x338/0x390 mm/shmem.c:3060 vfs_symlink+0x18a/0x280 fs/namei.c:4299 do_symlinkat+0x104/0x380 fs/namei.c:4328 __do_sys_symlink fs/namei.c:4350 [inline] __se_sys_symlink fs/namei.c:4348 [inline] __x64_sys_symlink+0x52/0x60 fs/namei.c:4348 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888133be2e40 of 4 bytes by task 1438 on cpu 1: fast_dput fs/dcache.c:774 [inline] dput+0x34/0x430 fs/dcache.c:900 handle_mounts fs/namei.c:1552 [inline] step_into+0x468/0xf70 fs/namei.c:1850 walk_component+0x1a1/0x360 fs/namei.c:2026 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:443 __do_sys_readlink fs/stat.c:476 [inline] __se_sys_readlink fs/stat.c:473 [inline] __x64_sys_readlink+0x43/0x50 fs/stat.c:473 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000008 -> 0x00600008 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 1438 Comm: udevd Not tainted 5.17.0-rc7-syzkaller-00241-gf0e18b03fcaf-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================