syzbot

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refcount_t: addition on 0; use-after-free.
WARNING: CPU: 0 PID: 1144 at lib/refcount.c:25 refcount_warn_saturate+0x1b8/0x1f0 lib/refcount.c:25
Modules linked in:
CPU: 0 PID: 1144 Comm: kworker/0:3 Not tainted 6.5.0-rc6-syzkaller-00027-g91aa6c412d7f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events sco_sock_timeout
RIP: 0010:refcount_warn_saturate+0x1b8/0x1f0 lib/refcount.c:25
Code: 0a 31 ff 89 de e8 18 d3 66 fd 84 db 0f 85 f6 fe ff ff e8 db d7 66 fd 48 c7 c7 20 cb c7 8a c6 05 b9 a0 76 0a 01 e8 08 9a 2d fd <0f> 0b e9 d7 fe ff ff e8 bc d7 66 fd 48 c7 c7 e0 cb c7 8a c6 05 98
RSP: 0018:ffffc90005c2fcb0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff8880218b3b80 RSI: ffffffff814ccc86 RDI: 0000000000000001
RBP: ffff888039122080 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88807737d408
R13: ffff888039122080 R14: ffff8880b9841600 R15: ffff88807737d450
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000f40 CR3: 0000000016f82000 CR4: 0000000000350ef0
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:777 [inline]
 sco_sock_timeout+0x232/0x2b0 net/bluetooth/sco.c:89
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600
 worker_thread+0x687/0x1110 kernel/workqueue.c:2751
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>