syzbot

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BUG: KCSAN: data-race in __dput_to_list / dput

write to 0xffff88810a33bf00 of 4 bytes by task 3083 on cpu 1:
 d_lru_del fs/dcache.c:437 [inline]
 __dput_to_list+0xab/0x240 fs/dcache.c:926
 shrink_dentry_list+0x196/0x380 fs/dcache.c:1200
 shrink_dcache_parent+0x44/0x1a0
 vfs_rmdir+0x283/0x2f0 fs/namei.c:4204
 do_rmdir+0x194/0x310 fs/namei.c:4259
 __do_sys_unlinkat fs/namei.c:4437 [inline]
 __se_sys_unlinkat fs/namei.c:4431 [inline]
 __x64_sys_unlinkat+0xa4/0xb0 fs/namei.c:4431
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88810a33bf00 of 4 bytes by task 14579 on cpu 0:
 fast_dput fs/dcache.c:774 [inline]
 dput+0x35/0x1f0 fs/dcache.c:900
 path_put+0x1f/0x40 fs/namei.c:561
 free_fs_struct fs/fs_struct.c:91 [inline]
 exit_fs+0xaf/0xe0 fs/fs_struct.c:108
 do_exit+0x5e8/0x1670 kernel/exit.c:870
 __do_sys_exit kernel/exit.c:991 [inline]
 __se_sys_exit kernel/exit.c:989 [inline]
 __x64_sys_exit+0x1f/0x20 kernel/exit.c:989
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00280000 -> 0x00200100

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14579 Comm: syz-executor.1 Not tainted 6.5.0-rc1-syzkaller-00006-g3f01e9fed845 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
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