------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 0 PID: 14 at lib/refcount.c:28 refcount_warn_saturate+0x11b/0x1a0 lib/refcount.c:28
Modules linked in:
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:refcount_warn_saturate+0x11b/0x1a0 lib/refcount.c:28
Code: 09 01 48 c7 c7 40 6a 59 8a e8 e1 ec ba 05 0f 0b eb c4 e8 28 46 9c fd c6 05 73 93 79 09 01 48 c7 c7 a0 6a 59 8a e8 c5 ec ba 05 <0f> 0b eb a8 e8 0c 46 9c fd c6 05 54 93 79 09 01 48 c7 c7 e0 69 59
RSP: 0018:ffffc90000d37c78 EFLAGS: 00010246
RAX: bfa356f807c91200 RBX: 0000000000000003 RCX: ffff88813fea9dc0
RDX: 0000000000000100 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: ffffed1017204f24
R10: ffffed1017204f24 R11: 1ffff11017204f23 R12: dffffc0000000000
R13: 0000000000000005 R14: 0000000000000003 R15: ffffffff8a7ca340
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe2b1d4cb4 CR3: 0000000074e5c000 CR4: 00000000003506f0
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+0xfa/0x140 block/blk-mq.c:592
 handle_softirqs+0x328/0x820 kernel/softirq.c:558
 run_ksoftirqd+0x98/0xf0 kernel/softirq.c:925
 smpboot_thread_fn+0x4f6/0x970 kernel/smpboot.c:164
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>