syzbot


INFO: task hung in crda_timeout_work (8)

Status: upstream: reported C repro on 2024/09/27 16:53
Subsystems: wireless
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+d41f74db64598e0b5016@syzkaller.appspotmail.com
First crash: 736d, last: 2d10h
Cause bisection: introduced by (bisect log) :
commit 5f6bd380c7bdbe10f7b4e8ddcceed60ce0714c6d
Author: Peter Zijlstra <peterz@infradead.org>
Date: Mon May 27 12:06:55 2024 +0000

  sched/rt: Remove default bandwidth control

Crash: INFO: task hung in corrupted (log)
Repro: C syz .config
  
Fix bisection: failed (error log, bisect log)
  
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision Error
6aedf4d2-4f40-4906-9519-e0b3f0bbf17a assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ INFO: task hung in crda_timeout_work (8) 2026/05/31 09:32 2026/05/31 09:32 2026/05/31 11:08 6b4a844333e83556da95d61d7f207e7ef5cd4bc6

			
		
5b39885e-8335-4e37-bbcb-a1edb21c8cd4 assessment-security 💥 INFO: task hung in crda_timeout_work (8) 2026/05/14 16:03 2026/05/14 16:03 2026/05/14 16:04 6ccb967e465e832a7bfd7a116ad00d52a0923a5d
failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 128
From /app/workdir/repo/linux
 * branch                HEAD       -> FETCH_HEAD
Updating files:  ...
truncated to first 200 bytes; open job for full error
Discussions (15)
Title Replies (including bot) Last reply
[syzbot] Monthly wireless report (Jun 2026) 0 (1) 2026/06/02 20:32
[syzbot] Monthly wireless report (May 2026) 0 (1) 2026/05/02 12:32
[syzbot] Monthly wireless report (Sep 2025) 0 (1) 2025/09/25 16:01
[syzbot] Monthly wireless report (Aug 2025) 0 (1) 2025/08/25 13:19
[syzbot] Monthly wireless report (Jul 2025) 0 (1) 2025/07/25 12:39
[syzbot] Monthly wireless report (Jun 2025) 0 (1) 2025/06/24 07:38
[syzbot] Monthly wireless report (May 2025) 0 (1) 2025/05/24 10:04
[syzbot] Monthly wireless report (Apr 2025) 0 (1) 2025/04/22 12:41
[syzbot] Monthly wireless report (Mar 2025) 0 (1) 2025/03/18 14:49
[syzbot] Monthly wireless report (Feb 2025) 0 (1) 2025/02/16 21:53
[syzbot] Monthly wireless report (Jan 2025) 0 (1) 2025/01/15 13:48
[syzbot] Monthly wireless report (Dec 2024) 0 (1) 2024/12/16 09:44
[syzbot] Monthly wireless report (Nov 2024) 0 (1) 2024/11/14 08:58
[syzbot] Monthly wireless report (Oct 2024) 0 (1) 2024/10/14 07:15
[syzbot] [wireless?] INFO: task hung in crda_timeout_work (8) 0 (1) 2024/09/27 16:53
Similar bugs (24)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 INFO: task hung in crda_timeout_work 1 2 114d 212d 0/2 auto-obsoleted due to no activity on 2026/07/04 01:25
upstream INFO: task hung in crda_timeout_work net 1 1 2861d 2860d 0/29 auto-closed as invalid on 2019/03/16 12:56
linux-6.1 INFO: task hung in crda_timeout_work (2) 1 1 634d 634d 0/3 auto-obsoleted due to no activity on 2025/01/30 06:51
upstream INFO: task hung in crda_timeout_work (2) net 1 1 2674d 2674d 0/29 auto-closed as invalid on 2019/09/19 06:28
upstream INFO: task hung in crda_timeout_work (7) wireless 1 1084 741d 784d 26/29 fixed on 2024/07/09 19:14
upstream INFO: task hung in crda_timeout_work (6) wireless 1 1 1480d 1480d 0/29 auto-closed as invalid on 2022/09/27 01:38
android-44 INFO: task hung in crda_timeout_work 1 1 3025d 3025d 0/2 auto-closed as invalid on 2019/02/22 14:39
upstream INFO: task hung in crda_timeout_work (3) wireless 1 8 2109d 2201d 0/29 auto-closed as invalid on 2021/01/06 02:49
upstream INFO: task hung in crda_timeout_work (5) wireless 1 1 1773d 1773d 0/29 auto-closed as invalid on 2021/12/07 21:47
linux-6.1 INFO: task hung in crda_timeout_work 1 49 706d 788d 0/3 auto-obsoleted due to no activity on 2024/10/20 15:08
linux-5.15 INFO: task hung in crda_timeout_work 1 41 611d 788d 0/3 auto-obsoleted due to no activity on 2025/01/22 17:11
upstream INFO: task hung in crda_timeout_work (4) wireless 1 1 1990d 1990d 0/29 auto-closed as invalid on 2021/05/17 11:47
linux-5.15 INFO: rcu detected stall in worker_thread 1 1 1023d 1023d 0/3 auto-obsoleted due to no activity on 2024/01/09 18:17
upstream INFO: rcu detected stall in worker_thread (8) kernel 1 1 1166d 1166d 0/29 auto-obsoleted due to no activity on 2023/08/07 05:14
upstream INFO: rcu detected stall in worker_thread (5) kernel 1 2 1507d 1544d 0/29 auto-closed as invalid on 2022/08/31 00:50
android-6-12 INFO: rcu detected stall in worker_thread 1 1 280d 280d 0/1 auto-obsoleted due to no activity on 2026/01/09 16:24
upstream INFO: rcu detected stall in worker_thread (9) prio:low netfilter 1 C done 5508 4h51m 1014d 0/29 upstream: reported C repro on 2023/10/07 18:33
linux-6.1 INFO: rcu detected stall in worker_thread 1 6 758d 789d 0/3 auto-obsoleted due to no activity on 2024/09/27 16:46
linux-6.6 INFO: rcu detected stall in worker_thread origin:lts-only 1 C done 304 1h19m 395d 0/2 upstream: reported C repro on 2025/06/18 07:15
upstream INFO: rcu detected stall in worker_thread (6) kernel 1 1 1383d 1383d 0/29 auto-obsoleted due to no activity on 2023/01/12 15:50
linux-5.15 INFO: rcu detected stall in worker_thread (2) 1 4 762d 767d 0/3 auto-obsoleted due to no activity on 2024/09/24 04:34
upstream INFO: rcu detected stall in worker_thread (7) kernel 1 1 1276d 1276d 0/29 auto-obsoleted due to no activity on 2023/04/27 16:37
linux-6.1 INFO: rcu detected stall in worker_thread (2) 1 1 542d 542d 0/3 auto-obsoleted due to no activity on 2025/05/01 18:18
android-5-15 BUG: soft lockup in worker_thread origin:lts 1 C done 1 691d 691d 0/2 auto-obsoleted due to no activity on 2024/12/04 04:19
Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/07/02 23:14 1h08m retest repro net-next log
2026/07/02 05:13 33m retest repro upstream log
2026/07/02 05:13 55m retest repro upstream log
2026/07/01 23:39 42m retest repro net-next log
2026/07/01 23:39 25m retest repro net log
2026/07/01 23:39 31m retest repro upstream log
2026/07/01 23:39 3h52m retest repro upstream log
2026/07/01 23:39 38m retest repro net-next log
2026/06/30 19:40 30m retest repro upstream OK log
2026/03/07 01:36 21m retest repro net-next report log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2026/03/08 20:13 21m bisect fix upstream error job log
2025/11/18 15:23 6h25m bisect fix upstream OK (0) job log log

Sample crash report:
INFO: task kworker/0:1:10 blocked for more than 142 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:24096 pid:10    tgid:10    ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient crda_timeout_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7383
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821
 crda_timeout_work+0x16/0x80 net/wireless/reg.c:529
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486
 kthread+0x388/0x470 kernel/kthread.c:436

Crashes (632):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/10 23:03 upstream a635d6748234 99e64375 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2025/08/23 01:39 upstream a2e94e80790b bf27483f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2024/09/26 12:01 upstream aa486552a110 0d19f247 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2025/05/15 12:56 net 09db7a4d287d d6b2ee52 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in crda_timeout_work
2025/12/29 18:32 net-next 7b8e9264f55a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2024/10/08 22:42 net-next 489cee4caeba 402f1df0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2024/10/12 05:23 upstream 9e4c6c1ad9a1 084d8178 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2024/10/06 20:22 upstream 8f602276d390 d7906eff .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2024/10/18 07:06 net-next 6d858708d465 666f77ed .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2026/07/16 06:03 upstream 58717b2a1365 27a8bd60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/06/13 01:39 upstream 1dadb7e7eb5a 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/06/02 19:14 upstream 6f3ed7fec72f 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/05/15 07:50 upstream 66182ca873a4 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/05/04 04:26 upstream f377d0025eb0 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in crda_timeout_work
2026/04/21 15:36 upstream b4e07588e743 3f2e655b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2026/04/21 14:22 upstream b4e07588e743 3f2e655b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2026/04/15 10:11 upstream 883af1f8e878 e2e976a8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/04/03 06:33 upstream 5619b098e2fb 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/03/31 00:02 upstream 7aaa8047eafd 458630d8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in crda_timeout_work
2026/03/28 07:57 upstream 7df48e363130 ef441708 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/03/13 19:35 upstream 0257f64bdac7 351cb5cf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/02/06 17:40 upstream b7ff7151e653 97745f52 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/02/02 01:22 upstream 9f2693489ef8 6b8752f2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/01/25 20:11 upstream d91a46d6805a 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/01/23 04:23 upstream a66191c590b3 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/01/10 21:25 upstream b6151c4e60e5 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2026/01/06 10:04 upstream 7f98ab9da046 d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/12/30 06:10 upstream 8640b74557fc d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/12/12 16:47 upstream 187d0801404f d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/12/10 15:01 upstream 0048fbb4011e d1b870e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/10/18 03:10 upstream 6f3b6e91f720 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/09/30 14:30 upstream 30d4efb2f5a5 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/09/28 17:41 upstream 51a24b7deaae 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/09/27 23:03 upstream fec734e8d564 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/09/24 06:25 upstream cec1e6e5d1ab 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in crda_timeout_work
2025/09/20 10:19 upstream 1522b530ac3e 67c37560 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/09/14 12:46 upstream f83a4f2a4d8c e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/09/13 21:49 upstream 5cd64d4f9268 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/09/04 06:54 upstream b9a10f876409 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2025/09/02 12:57 upstream b320789d6883 807a3b61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/09/01 11:33 upstream b320789d6883 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/09/01 04:04 upstream 5c3b3264e585 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/08/31 04:15 upstream c8bc81a52d5a 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/08/27 20:32 upstream 39f90c196721 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in crda_timeout_work
2025/08/15 00:52 upstream 0cc53520e68b dcc075fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2025/08/09 19:33 upstream c30a13538d9f 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/07/12 05:37 upstream 40f92e79b0aa 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/07/12 03:21 upstream 40f92e79b0aa 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/07/09 08:52 upstream 733923397fd9 f4e5e155 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in crda_timeout_work
2025/01/27 17:08 upstream c2da8b3f914f d99a33ad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in crda_timeout_work
2024/09/18 03:01 upstream 2f27fce67173 c673ca06 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in crda_timeout_work
2026/05/24 17:05 upstream 4cbfe4502e3d c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in crda_timeout_work
2025/08/17 20:22 upstream 99bade344cfa 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in crda_timeout_work
2025/04/18 22:52 upstream fc96b232f8e7 2a20f901 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: task hung in crda_timeout_work
2026/03/18 01:12 net 069c8f5aebe4 c8810548 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in crda_timeout_work
2025/08/17 03:11 net 715c7a36d59f 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in crda_timeout_work
2026/03/21 21:09 net-next fb78a629b4f0 5b92003d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2026/01/22 02:18 net-next d8f87aa5fa0a 101dad69 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2026/01/16 22:43 net-next 74ecff77dace d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2026/01/08 02:02 net-next 8e7148b56023 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2025/08/24 18:55 net-next b1c92cdf5af3 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in crda_timeout_work
2026/06/16 18:47 linux-next 4fa3f5fabb30 0e4b3e40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in crda_timeout_work
2026/03/10 20:29 linux-next 343f51842f4e 4683d576 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in crda_timeout_work
2025/07/03 03:23 linux-next 50c8770a42fa 0cd59a8f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in crda_timeout_work
* Struck through repros no longer work on HEAD.