syzbot


WARNING in hci_conn_timeout

Status: upstream: reported C repro on 2025/06/25 01:13
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+e6c889790f3159fa29e2@syzkaller.appspotmail.com
First crash: 3d20h, last: 2d00h
Bug presence (2)
Date Name Commit Repro Result
2025/06/26 linux-6.6.y (ToT) 6282921b6825 C [report] WARNING in hci_conn_timeout
2025/06/26 upstream (ToT) f02769e7f272 C Didn't crash
Similar bugs (6)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in hci_conn_timeout bluetooth C done 6022 194d 1792d 28/29 fixed on 2024/12/16 09:50
linux-5.15 WARNING in hci_conn_timeout origin:lts-only C done 1233 6h31m 841d 0/3 upstream: reported C repro on 2023/03/10 14:50
linux-4.14 WARNING in hci_conn_timeout C inconclusive 27 859d 1793d 0/1 upstream: reported C repro on 2020/07/31 02:13
upstream WARNING in hci_conn_timeout (2) bluetooth C error 514 11h10m 193d 0/29 upstream: reported C repro on 2024/12/17 17:47
linux-4.19 WARNING in hci_conn_timeout C error 127 846d 1792d 0/1 upstream: reported C repro on 2020/08/01 17:09
linux-6.1 WARNING in hci_conn_timeout origin:lts-only C done 3874 8m 843d 0/3 upstream: reported C repro on 2023/03/08 17:34

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5790 at net/bluetooth/hci_conn.c:568 hci_conn_timeout+0xf9/0x290 net/bluetooth/hci_conn.c:568
Modules linked in:
CPU: 1 PID: 5790 Comm: kworker/u5:3 Not tainted 6.6.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: hci3 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0xf9/0x290 net/bluetooth/hci_conn.c:568
Code: f8 48 89 df e8 c8 b7 08 00 eb 07 e8 b1 11 1c f8 b0 13 0f b6 f0 48 89 df 5b 41 5c 41 5e 41 5f 5d e9 ec e0 fe ff e8 97 11 1c f8 <0f> 0b eb 8e 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 38 ff ff ff 4c
RSP: 0018:ffffc900046afb90 EFLAGS: 00010293
RAX: ffffffff89698439 RBX: ffff88807ddde000 RCX: ffff888079918000
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffff88807ddde013 R09: 1ffff1100fbbbc02
R10: dffffc0000000000 R11: ffffed100fbbbc03 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff88807ddde350 R15: ffff88807ddde010
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ff43a7094 CR3: 000000000cb30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/25 20:27 linux-6.6.y 6282921b6825 26d77996 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (clean fs)] ci2-linux-6-6-kasan WARNING in hci_conn_timeout
2025/06/25 01:12 linux-6.6.y 6282921b6825 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in hci_conn_timeout
* Struck through repros no longer work on HEAD.