syzbot

 sign-in | mailing list | source | docs
🐞 Open [712]
🐞 Fixed [297]
🐞 Invalid [838]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

INFO: task hung in netdev_run_todo (3)

Status: auto-obsoleted due to no activity on 2023/03/07 08:19
Reported-by: syzbot+0d0982d8e32705832a48@syzkaller.appspotmail.com
First crash: 1537d, last: 1221d
▶ ▼ Similar bugs (17)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.6 INFO: task hung in netdev_run_todo 1 1 188d 188d 0/2 auto-obsoleted due to no activity on 2025/12/14 15:00
linux-5.15 INFO: task hung in netdev_run_todo (3) 1 1 76d 76d 0/3 upstream: reported on 2025/12/26 15:48
upstream INFO: task hung in netdev_run_todo net 1 12 2395d 2950d 0/29 closed as invalid on 2019/10/23 07:29
linux-4.19 INFO: task hung in netdev_run_todo (2) 1 3 2028d 2076d 0/1 auto-closed as invalid on 2020/12/20 04:57
android-44 INFO: task hung in netdev_run_todo 1 1 2889d 2889d 0/2 auto-closed as invalid on 2019/02/22 12:49
upstream INFO: task hung in netdev_run_todo (4) wireguard 1 764 1d03h 519d 0/29 upstream: reported on 2024/10/09 19:06
android-6-12 INFO: task hung in netdev_run_todo (2) 1 43 1d21h 49d 0/1 premoderation: reported on 2026/01/22 03:02
linux-4.19 INFO: task hung in netdev_run_todo 1 1 2354d 2354d 0/1 auto-closed as invalid on 2020/01/29 06:48
upstream INFO: task hung in netdev_run_todo (3) net 1 24 632d 670d 0/29 auto-obsoleted due to no activity on 2024/08/07 04:24
linux-5.15 INFO: task hung in netdev_run_todo 1 1 867d 867d 0/3 auto-obsoleted due to no activity on 2024/02/04 09:09
linux-6.6 INFO: task hung in netdev_run_todo (2) 1 1 56d 56d 0/2 upstream: reported on 2026/01/14 20:32
upstream INFO: task hung in netdev_run_todo (2) staging wireguard usb 1 C error 241 758d 1915d 0/29 auto-obsoleted due to no activity on 2024/05/05 22:51
android-49 INFO: task hung in netdev_run_todo 1 1 2882d 2882d 0/3 auto-closed as invalid on 2019/02/22 14:57
linux-4.14 INFO: task hung in netdev_run_todo 1 1 1215d 1215d 0/1 auto-obsoleted due to no activity on 2023/03/13 17:45
android-6-12 INFO: task hung in netdev_run_todo 1 184 118d 263d 0/1 auto-obsoleted due to no activity on 2026/01/03 01:56
linux-5.15 INFO: task hung in netdev_run_todo (2) 1 54 479d 661d 0/3 auto-obsoleted due to no activity on 2025/01/26 20:30
upstream INFO: task can't die in netdev_run_todo net 1 syz error 2 1637d 2030d 0/29 auto-obsoleted due to no activity on 2023/04/16 04:59

Sample crash report:
wlan1: No active IBSS STAs - trying to scan for other IBSS networks with same SSID (merge)
Bluetooth: hci6: command 0x0409 tx timeout
Bluetooth: hci5: command 0x0406 tx timeout
Bluetooth: hci6: command 0x041b tx timeout
INFO: task kworker/u4:2:58 blocked for more than 140 seconds.
      Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Bluetooth: hci6: command 0x040f tx timeout
kworker/u4:2    D26048    58      2 0x80000000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
Bluetooth: hci6: command 0x0419 tx timeout
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619
 __mutex_lock_common kernel/locking/mutex.c:1016 [inline]
 __mutex_lock+0x5f0/0x1190 kernel/locking/mutex.c:1078
 netdev_run_todo+0x719/0xab0 net/core/dev.c:9005

Crashes (15):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/11/07 08:19 linux-4.19.y 3f8a27f9e27b 6d752409 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/10/25 23:47 linux-4.19.y 3f8a27f9e27b 2159e4d2 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/09/19 10:44 linux-4.19.y 3f8a27f9e27b dd9a85ff .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/08/30 14:10 linux-4.19.y 3f8a27f9e27b 4a380809 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/08/01 21:06 linux-4.19.y 3f8a27f9e27b fef302b1 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/05/01 23:22 linux-4.19.y 3f8a27f9e27b 2df221f6 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/02/11 18:51 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/01/17 05:22 linux-4.19.y 3f8a27f9e27b 723cfaf0 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/01/13 08:01 linux-4.19.y 3f8a27f9e27b 44d1319a .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/01/11 02:06 linux-4.19.y 3f8a27f9e27b ddb0ab8c .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/01/09 17:44 linux-4.19.y 3f8a27f9e27b 2ca0d385 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/01/06 16:34 linux-4.19.y 3f8a27f9e27b 6acc789a .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2022/01/06 13:34 linux-4.19.y 3f8a27f9e27b 6acc789a .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2021/12/28 07:40 linux-4.19.y 3f8a27f9e27b 6b3c5e64 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
2021/12/26 06:15 linux-4.19.y 3f8a27f9e27b 6caa12e4 .config console log report info ci2-linux-4-19 INFO: task hung in netdev_run_todo
* Struck through repros no longer work on HEAD.