------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 20 at lib/refcount.c:28 refcount_warn_saturate+0x14e/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 5.15.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
RIP: 0010:refcount_warn_saturate+0x14e/0x1a0 lib/refcount.c:28
Code: 09 01 48 c7 c7 a0 28 d8 8a e8 0e 53 45 fd 0f 0b eb 8d e8 b5 86 79 fd c6 05 5c 2f ca 09 01 48 c7 c7 00 29 d8 8a e8 f2 52 45 fd <0f> 0b e9 6e ff ff ff e8 96 86 79 fd c6 05 3e 2f ca 09 01 48 c7 c7
RSP: 0018:ffffc90000da7c80 EFLAGS: 00010246
RAX: 0047c502148e6c00 RBX: 0000000000000003 RCX: ffff888012990000
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000003 R08: ffffffff8166490c R09: ffffed10173667a0
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000005
R13: 0000000000000004 R14: 0000000000000000 R15: ffff88801b869800
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd2ea6ec198 CR3: 0000000019ee5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 blk_complete_reqs block/blk-mq.c:587 [inline]
 blk_done_softirq+0xf2/0x130 block/blk-mq.c:592
 __do_softirq+0x3b3/0x93a kernel/softirq.c:558
 run_ksoftirqd+0xc1/0x120 kernel/softirq.c:920
 smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>