------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 1 PID: 3672 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 lib/refcount.c:25
Modules linked in:
CPU: 1 PID: 3672 Comm: kworker/1:4 Not tainted 5.17.0-rc4-syzkaller-00149-g7a2fb9128515 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events sco_sock_timeout
RIP: 0010:refcount_warn_saturate+0x169/0x1e0 lib/refcount.c:25
Code: 09 31 ff 89 de e8 f7 93 98 fd 84 db 0f 85 36 ff ff ff e8 6a 91 98 fd 48 c7 c7 20 07 06 8a c6 05 e1 1e 9f 09 01 e8 77 a0 29 05 <0f> 0b e9 17 ff ff ff e8 4b 91 98 fd 0f b6 1d c6 1e 9f 09 31 ff 89
RSP: 0000:ffffc90003bf7ce8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88807f0a0000 RSI: ffffffff81600d78 RDI: fffff5200077ef8f
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815fb40e R11: 0000000000000000 R12: ffff888018ff7c08
R13: ffff88807acc6080 R14: ffff8880225dbc00 R15: ffff8880b9d39480
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa21c4071b8 CR3: 00000000197bf000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __refcount_add include/linux/refcount.h:199 [inline]
 __refcount_inc include/linux/refcount.h:250 [inline]
 refcount_inc include/linux/refcount.h:267 [inline]
 sock_hold include/net/sock.h:712 [inline]
 sco_sock_timeout+0x216/0x290 net/bluetooth/sco.c:89
 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
 worker_thread+0x657/0x1110 kernel/workqueue.c:2454
 kthread+0x2e9/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>