------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 928 at lib/refcount.c:28 refcount_warn_saturate+0x15a/0x1d0 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 928 Comm: kworker/0:2 Not tainted 6.9.0-rc6-next-20240501-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_power_efficient do_cache_clean
RIP: 0010:refcount_warn_saturate+0x15a/0x1d0 lib/refcount.c:28
Code: 80 78 1f 8c e8 27 42 a8 fc 90 0f 0b 90 90 eb 99 e8 1b 13 e6 fc c6 05 96 79 e7 0a 01 90 48 c7 c7 e0 78 1f 8c e8 07 42 a8 fc 90 <0f> 0b 90 90 e9 76 ff ff ff e8 f8 12 e6 fc c6 05 70 79 e7 0a 01 90
RSP: 0018:ffffc90004d57a68 EFLAGS: 00010246
RAX: e1f1e191644f9f00 RBX: ffffffff937ebec8 RCX: ffff888021885a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000003 R08: ffffffff81584682 R09: 1ffff920009aaeec
R10: dffffc0000000000 R11: fffff520009aaeed R12: 0000000000000000
R13: dffffc0000000000 R14: ffffffff8a9da2b0 R15: ffffffff937ebec8
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555568f4c978 CR3: 000000000e132000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_sub_and_test include/linux/refcount.h:275 [inline]
 __refcount_dec_and_test include/linux/refcount.h:307 [inline]
 refcount_dec_and_test include/linux/refcount.h:325 [inline]
 kref_put include/linux/kref.h:64 [inline]
 cache_put include/linux/sunrpc/cache.h:213 [inline]
 sunrpc_end_cache_remove_entry net/sunrpc/cache.c:96 [inline]
 cache_clean+0x9de/0xa30 net/sunrpc/cache.c:491
 do_cache_clean+0x22/0xb0 net/sunrpc/cache.c:508
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>