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WARNING in hci_conn_timeout

Status: upstream: reported C repro on 2023/03/08 17:34
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+bfbb27ac82ea130a7a95@syzkaller.appspotmail.com
First crash: 1188d, last: 5h52m
Fix commit to backport (bisect log) :
tree: upstream
commit 5af1f84ed13a416297ab9ced7537f4d5ae7f329a
Author: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Thu Aug 3 18:04:51 2023 +0000

  Bluetooth: hci_sync: Fix UAF on hci_abort_conn_sync

[report pending]
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/10/30 linux-6.1.y (ToT) 32c9cdbe383c C [report] WARNING in hci_conn_timeout
2023/10/30 upstream (ToT) ffc253263a13 C Didn't crash
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in hci_conn_timeout bluetooth -1 C done 6022 539d 2137d 28/29 fixed on 2024/12/16 09:50
linux-5.15 WARNING in hci_conn_timeout origin:lts-only -1 C done 1428 2d20h 1186d 0/3 upstream: reported C repro on 2023/03/10 14:50
linux-4.14 WARNING in hci_conn_timeout -1 C inconclusive 27 1204d 2138d 0/1 upstream: reported C repro on 2020/07/31 02:13
linux-6.6 WARNING in hci_conn_timeout origin:lts-only -1 C inconclusive 28 2d03h 348d 0/2 upstream: reported C repro on 2025/06/25 01:13
upstream WARNING in hci_conn_timeout (2) prio:low bluetooth -1 C error 18025 17m 538d 0/29 upstream: reported C repro on 2024/12/17 17:47
linux-4.19 WARNING in hci_conn_timeout -1 C error 127 1191d 2137d 0/1 upstream: reported C repro on 2020/08/01 17:09
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/08/11 22:25 21m sumanth.gavini@yahoo.com patch linux-6.1.y report log
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/11/20 09:22 6h03m fix candidate upstream OK (1) job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 47 at net/bluetooth/hci_conn.c:663 hci_conn_timeout+0x250/0x450
Modules linked in:
CPU: 0 PID: 47 Comm: kworker/u5:0 Not tainted 6.1.80-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: hci0 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x250/0x450 net/bluetooth/hci_conn.c:663
Code: 73 8e e8 43 49 52 f8 48 8b 35 e4 70 e3 04 bf 08 00 00 00 48 89 da 5b 41 5c 41 5d 41 5e 41 5f 5d e9 95 9f c9 f7 e8 80 d3 fa f7 <0f> 0b e9 34 fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c dd fd ff
RSP: 0018:ffffc90000b87c28 EFLAGS: 00010293
RAX: ffffffff898fab90 RBX: ffff88807f3ae250 RCX: ffff88801a2a1dc0
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffffff898fa9a1 R09: ffffed100fe75c03
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff11003355e03 R14: ffff88807f3ae000 R15: ffffffff815ab459
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb268931248 CR3: 000000000ce8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Crashes (5713):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/04 02:36 linux-6.1.y a3eb3a74aa8c 25905f5d .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2024/01/21 10:10 linux-6.1.y 8fd7f4462453 9bd8dcda .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/12/29 14:31 linux-6.1.y 4aa6747d9352 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/08/12 19:50 linux-6.1.y 1321ab403b38 39990d51 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2024/04/28 06:30 linux-6.1.y f2295faba5e8 07b455f9 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2024/04/25 11:45 linux-6.1.y 6741e066ec76 8bdc0f22 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/08/05 06:34 linux-6.1.y 52a953d0934b cdae481e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/06/26 12:49 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/05/30 02:11 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/03/27 04:20 linux-6.1.y e3a87a10f259 fbf0499a .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/03/11 04:13 linux-6.1.y 8a923980a190 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2023/08/30 01:21 linux-6.1.y 024f76bca9d0 ce731e62 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/08/27 07:39 linux-6.1.y cd363bb9548e 7ba13a15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/08/16 06:26 linux-6.1.y 1321ab403b38 39990d51 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/06/06 21:57 linux-6.1.y 76ba310227d2 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/05/26 04:24 linux-6.1.y a343b0dd87b4 0513b3e6 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/04/30 18:28 linux-6.1.y ca1c9012c941 62df2017 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/03/18 08:38 linux-6.1.y 7eaef76fbc46 7939252e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/03/11 05:39 linux-6.1.y 8a923980a190 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/05/02 08:01 linux-6.1.y ca48fc16c493 62df2017 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/08 15:39 linux-6.1.y 228da13e907e 656e94c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/08 08:28 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/07 09:23 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/07 07:30 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/07 04:37 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/07 04:09 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/06 20:32 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/06 00:24 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/05 22:51 linux-6.1.y 228da13e907e 48b6c3fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/05 10:43 linux-6.1.y 228da13e907e 48b6c3fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/05 08:11 linux-6.1.y 228da13e907e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/04 15:27 linux-6.1.y 228da13e907e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/06/04 05:20 linux-6.1.y 228da13e907e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/02 02:34 linux-6.1.y 228da13e907e 1095583b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/01 20:16 linux-6.1.y 228da13e907e 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/01 17:30 linux-6.1.y 228da13e907e 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/31 14:50 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/31 05:15 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/30 23:58 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/30 18:03 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/29 20:05 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/29 14:56 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/29 11:52 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/29 03:02 linux-6.1.y dcbcab9d7079 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/28 14:20 linux-6.1.y dcbcab9d7079 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/28 12:04 linux-6.1.y dcbcab9d7079 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/28 11:00 linux-6.1.y dcbcab9d7079 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/28 02:17 linux-6.1.y dcbcab9d7079 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/27 14:41 linux-6.1.y dcbcab9d7079 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/27 14:40 linux-6.1.y dcbcab9d7079 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/05/27 05:30 linux-6.1.y dcbcab9d7079 2b01f00e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING in hci_conn_timeout
2026/05/27 00:21 linux-6.1.y dcbcab9d7079 2b01f00e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in hci_conn_timeout
2026/06/07 22:10 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/07 02:13 linux-6.1.y 228da13e907e cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/04 23:52 linux-6.1.y 228da13e907e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/04 00:39 linux-6.1.y 228da13e907e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/04 00:39 linux-6.1.y 228da13e907e 197909be .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/03 11:44 linux-6.1.y 228da13e907e 234057e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/02 06:39 linux-6.1.y 228da13e907e 1095583b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/02 01:31 linux-6.1.y 228da13e907e 1095583b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/01 08:10 linux-6.1.y dcbcab9d7079 8d8eeb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/06/01 00:55 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/30 19:33 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/29 21:51 linux-6.1.y dcbcab9d7079 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/28 23:31 linux-6.1.y dcbcab9d7079 4624854e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/28 15:48 linux-6.1.y dcbcab9d7079 681715f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/27 22:56 linux-6.1.y dcbcab9d7079 4c36e7e5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/27 12:07 linux-6.1.y dcbcab9d7079 8777bdc3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2026/05/26 20:48 linux-6.1.y dcbcab9d7079 2b01f00e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
2023/03/08 17:34 linux-6.1.y 42616e0f09fb 4fc6d98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in hci_conn_timeout
* Struck through repros no longer work on HEAD.