------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 27 at lib/refcount.c:25 refcount_warn_saturate+0x13a/0x1d0 lib/refcount.c:25
Modules linked in:
CPU: 1 PID: 27 Comm: kworker/1:1 Not tainted 6.8.0-rc3-syzkaller-00780-g4ec3b4aafc87 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events sco_sock_timeout
RIP: 0010:refcount_warn_saturate+0x13a/0x1d0 lib/refcount.c:25
Code: 40 1f fe 8b e8 e7 8c b7 fc 90 0f 0b 90 90 eb b9 e8 0b 7d f3 fc c6 05 19 58 d0 0a 01 90 48 c7 c7 a0 1f fe 8b e8 c7 8c b7 fc 90 <0f> 0b 90 90 eb 99 e8 eb 7c f3 fc c6 05 fa 57 d0 0a 01 90 48 c7 c7
RSP: 0018:ffffc90000a2fbb0 EFLAGS: 00010246
RAX: 854e451bbc983200 RBX: ffff888047f08080 RCX: ffff8880192a1dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000002 R08: ffffffff815779b2 R09: 1ffff92000145ec8
R10: dffffc0000000000 R11: fffff52000145ec9 R12: ffff888047f08000
R13: dffffc0000000000 R14: ffff888047f08080 R15: ffff88807ab76e08
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5856caed58 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_inc include/linux/refcount.h:239 [inline]
 refcount_inc include/linux/refcount.h:256 [inline]
 sock_hold include/net/sock.h:760 [inline]
 sco_sock_timeout+0x1b6/0x240 net/bluetooth/sco.c:88
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x913/0x1420 kernel/workqueue.c:2706
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
 kthread+0x2ef/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>