------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 0 PID: 11295 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 lib/refcount.c:25
Modules linked in:
CPU: 0 PID: 11295 Comm: kworker/0:27 Not tainted 5.17.0-rc3-syzkaller-00149-gbf8e59fd315f #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 be 99 fd 84 db 0f 85 36 ff ff ff e8 0a bb 99 fd 48 c7 c7 a0 0a 06 8a c6 05 d2 6b a0 09 01 e8 53 31 28 05 <0f> 0b e9 17 ff ff ff e8 eb ba 99 fd 0f b6 1d b7 6b a0 09 31 ff 89
RSP: 0018:ffffc9000497fce8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888049fc0000 RSI: ffffffff815fb318 RDI: fffff5200092ff8f
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff815f507e R11: 0000000000000000 R12: ffff888050862408
R13: ffff88804ef6a080 R14: ffff88804d515400 R15: ffff8880b9c39480
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fecf4e3b070 CR3: 0000000051ff7000 CR4: 00000000003506f0
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>