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WARNING in hci_conn_timeout

Status: upstream: reported C repro on 2023/03/10 14:50
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+b3668760e544f4a0b191@syzkaller.appspotmail.com
First crash: 923d, last: 5h16m
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

  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2023/11/05 linux-5.15.y (ToT) 12952a23a5da C [report] WARNING in hci_conn_timeout
2023/11/05 upstream (ToT) 1c41041124bd 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 276d 1874d 28/29 fixed on 2024/12/16 09:50
linux-4.14 WARNING in hci_conn_timeout -1 C inconclusive 27 941d 1876d 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 10 13d 86d 0/2 upstream: reported C repro on 2025/06/25 01:13
upstream WARNING in hci_conn_timeout (2) bluetooth -1 C error 706 1h16m 275d 0/29 upstream: reported C repro on 2024/12/17 17:47
linux-4.19 WARNING in hci_conn_timeout -1 C error 127 928d 1874d 0/1 upstream: reported C repro on 2020/08/01 17:09
linux-6.1 WARNING in hci_conn_timeout origin:lts-only -1 C done 4291 6h27m 925d 0/3 upstream: reported C repro on 2023/03/08 17:34
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/11/21 12:57 5h10m fix candidate upstream OK (1) job log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 146 at net/bluetooth/hci_conn.c:443 hci_conn_timeout+0x250/0x450
Modules linked in:
CPU: 1 PID: 146 Comm: kworker/u5:0 Not tainted 5.15.154-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: hci0 hci_conn_timeout
RIP: 0010:hci_conn_timeout+0x250/0x450 net/bluetooth/hci_conn.c:443
Code: e4 8d e8 c3 e4 8d f8 48 8b 35 b4 20 a8 04 bf 08 00 00 00 48 89 da 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b5 70 16 f8 e8 00 22 44 f8 <0f> 0b e9 34 fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c dd fd ff
RSP: 0018:ffffc900015dfc28 EFLAGS: 00010293
RAX: ffffffff893c3a00 RBX: ffff88807a718138 RCX: ffff888018409dc0
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000
RBP: 00000000ffffffff R08: ffffffff893c3811 R09: ffffed100f4e3003
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888016fad528 R14: ffff88807a718000 R15: ffff888016fad518
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555555d36c8 CR3: 000000000c68e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
 </TASK>

Crashes (1293):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/13 06:20 linux-5.15.y cdfd0a7f0139 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2024/04/06 21:07 linux-5.15.y 9465fef4ae35 ca620dd8 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2024/01/01 15:32 linux-5.15.y d93fa2c78854 fb427a07 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2023/06/27 11:18 linux-5.15.y f67653019430 4cd5bb25 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2023/06/20 19:41 linux-5.15.y 471e639e59d1 09ffe269 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2023/05/24 07:09 linux-5.15.y 9d6bde853685 4bce1a3e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2023/03/20 12:35 linux-5.15.y 8020ae3c051d 7939252e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2023/08/22 11:56 linux-5.15.y f6f7927ac664 6b415825 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/08/20 06:00 linux-5.15.y f6f7927ac664 d216d8a0 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/08/19 13:29 linux-5.15.y f6f7927ac664 d216d8a0 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/08/06 04:07 linux-5.15.y 38d4ca22a528 4ffcc9ef .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/06/06 19:36 linux-5.15.y d7af3e5ba454 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/05/27 21:43 linux-5.15.y 1fe619a7d252 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/05/07 17:13 linux-5.15.y 8a7f2a5c5aa1 90c93c40 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/03/11 09:59 linux-5.15.y abddfcf701a5 5205ef30 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/04/30 06:50 linux-5.15.y f48aeeaaa64c 62df2017 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/18 22:53 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/15 16:40 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/14 12:13 linux-5.15.y 43bb85222e53 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/10 16:16 linux-5.15.y de9476bb4f1b fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/08 20:52 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/08 03:50 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/09/06 23:50 linux-5.15.y 7a6c2d093c45 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/30 06:25 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/28 08:17 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/25 22:46 linux-5.15.y c79648372d02 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/20 01:39 linux-5.15.y c79648372d02 254a27c1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/17 10:37 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/16 20:16 linux-5.15.y c79648372d02 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/14 06:42 linux-5.15.y c79648372d02 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in hci_conn_timeout
2025/08/09 06:39 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/09 03:38 linux-5.15.y c79648372d02 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in hci_conn_timeout
2025/08/07 22:35 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/07 18:14 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/07 05:52 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/04 16:12 linux-5.15.y c79648372d02 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in hci_conn_timeout
2025/08/01 07:49 linux-5.15.y c79648372d02 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/31 14:41 linux-5.15.y c79648372d02 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/28 10:28 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/27 14:27 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-perf WARNING in hci_conn_timeout
2025/07/26 17:47 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/26 12:52 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/26 00:18 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/25 22:24 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/25 09:31 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/25 07:05 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/24 08:37 linux-5.15.y c79648372d02 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/22 09:49 linux-5.15.y c79648372d02 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/18 18:33 linux-5.15.y c79648372d02 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/18 11:45 linux-5.15.y c79648372d02 88248e14 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/16 18:56 linux-5.15.y 89950c454265 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/16 14:01 linux-5.15.y 89950c454265 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/07/16 13:57 linux-5.15.y 89950c454265 124ec9cc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in hci_conn_timeout
2025/08/07 03:46 linux-5.15.y c79648372d02 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/08/06 17:12 linux-5.15.y c79648372d02 ffe1dd46 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/31 23:49 linux-5.15.y c79648372d02 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/31 12:50 linux-5.15.y c79648372d02 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/31 03:35 linux-5.15.y c79648372d02 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/24 17:35 linux-5.15.y c79648372d02 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/24 03:37 linux-5.15.y c79648372d02 0c1d6ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/22 07:12 linux-5.15.y c79648372d02 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2025/07/20 12:04 linux-5.15.y c79648372d02 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
2023/03/10 14:49 linux-5.15.y abddfcf701a5 5205ef30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in hci_conn_timeout
* Struck through repros no longer work on HEAD.