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BUG: KCSAN: data-race in __dentry_kill / fast_dput

write to 0xffff888106802310 of 8 bytes by task 11888 on cpu 1:
 __d_drop fs/dcache.c:521 [inline]
 __dentry_kill+0x13e/0x4c0 fs/dcache.c:613
 dput+0x5c/0xd0 fs/dcache.c:857
 handle_mounts fs/namei.c:1579 [inline]
 step_into+0x21a/0x810 fs/namei.c:1877
 open_last_lookups fs/namei.c:3674 [inline]
 path_openat+0x14f7/0x1f10 fs/namei.c:3883
 do_filp_open+0xf7/0x200 fs/namei.c:3913
 io_openat2+0x280/0x3a0 io_uring/openclose.c:140
 io_issue_sqe+0x181/0xcc0 io_uring/io_uring.c:1710
 io_wq_submit_work+0x480/0x600 io_uring/io_uring.c:1819
 io_worker_handle_work+0x486/0x9d0 io_uring/io-wq.c:600
 io_wq_worker+0x286/0x820 io_uring/io-wq.c:654
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

read to 0xffff888106802310 of 8 bytes by task 11883 on cpu 0:
 hlist_bl_unhashed include/linux/list_bl.h:54 [inline]
 d_unhashed include/linux/dcache.h:354 [inline]
 retain_dentry fs/dcache.c:698 [inline]
 fast_dput+0x65/0x2c0 fs/dcache.c:794
 dput+0x24/0xd0 fs/dcache.c:851
 handle_mounts fs/namei.c:1579 [inline]
 step_into+0x21a/0x810 fs/namei.c:1877
 open_last_lookups fs/namei.c:3674 [inline]
 path_openat+0x14f7/0x1f10 fs/namei.c:3883
 do_filp_open+0xf7/0x200 fs/namei.c:3913
 io_openat2+0x280/0x3a0 io_uring/openclose.c:140
 io_issue_sqe+0x181/0xcc0 io_uring/io_uring.c:1710
 io_wq_submit_work+0x480/0x600 io_uring/io_uring.c:1819
 io_worker_handle_work+0x486/0x9d0 io_uring/io-wq.c:600
 io_wq_worker+0x286/0x820 io_uring/io-wq.c:654
 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

value changed: 0xffff8882374a2d38 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 11883 Comm: iou-wrk-11882 Not tainted 6.11.0-rc6-syzkaller-00017-gc9f016e72b5c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
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