==================================================================
BUG: KCSAN: data-race in dput / vfs_unlink

write to 0xffff88800dc59240 of 4 bytes by task 2768 on cpu 1:
 dont_mount include/linux/dcache.h:357 [inline]
 vfs_unlink+0x289/0x3e0 fs/namei.c:4031
 do_unlinkat+0x29f/0x4f0 fs/namei.c:4096
 __do_sys_unlink fs/namei.c:4143 [inline]
 __se_sys_unlink fs/namei.c:4141 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4141
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff88800dc59240 of 4 bytes by task 4845 on cpu 0:
 fast_dput fs/dcache.c:747 [inline]
 dput+0x34/0x430 fs/dcache.c:873
 path_put+0x1b/0x30 fs/namei.c:546
 do_readlinkat+0x188/0x200 fs/stat.c:432
 __do_sys_readlink fs/stat.c:450 [inline]
 __se_sys_readlink fs/stat.c:447 [inline]
 __x64_sys_readlink+0x43/0x50 fs/stat.c:447
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 4845 Comm: systemd-udevd Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 4845 Comm: systemd-udevd Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x137/0x19d lib/dump_stack.c:120
 panic+0x1e7/0x5fa kernel/panic.c:231
 kcsan_report+0x67b/0x680 kernel/kcsan/report.c:634
 kcsan_setup_watchpoint+0x40b/0x470 kernel/kcsan/core.c:564
 fast_dput fs/dcache.c:747 [inline]
 dput+0x34/0x430 fs/dcache.c:873
 path_put+0x1b/0x30 fs/namei.c:546
 do_readlinkat+0x188/0x200 fs/stat.c:432
 __do_sys_readlink fs/stat.c:450 [inline]
 __se_sys_readlink fs/stat.c:447 [inline]
 __x64_sys_readlink+0x43/0x50 fs/stat.c:447
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7faccfba8087
Code: 73 01 c3 48 8b 0d 11 be 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 bd 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffce2b4d548 EFLAGS: 00000293 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 00007ffce2b4d5e0 RCX: 00007faccfba8087
RDX: 0000000000000200 RSI: 00007ffce2b4d6f0 RDI: 00007ffce2b4d5c0
RBP: 00007ffce2b4db48 R08: 0000000000000001 R09: 0000000000000014
R10: 0000000000000064 R11: 0000000000000293 R12: 00007ffce2b4d6f0
R13: 00005631bdb43010 R14: 00005631bdb430e0 R15: 00007ffce2b4d5c0
Kernel Offset: disabled
Rebooting in 86400 seconds..