syzbot

 sign-in | mailing list | source | docs
🐞 Open [870]
🐞 Fixed [141]
🐞 Invalid [1007]
⬇ Missing Backports [73]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

INFO: task hung in rtnetlink_rcv_msg

Status: auto-obsoleted due to no activity on 2024/01/09 18:18
Reported-by: syzbot+3c1b4e500df7b7955c95@syzkaller.appspotmail.com
First crash: 862d, last: 862d
▶ ▼ Similar bugs (16)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 INFO: task hung in rtnetlink_rcv_msg 1 1 937d 937d 0/3 auto-obsoleted due to no activity on 2023/10/22 21:13
linux-4.19 INFO: task hung in rtnetlink_rcv_msg (2) 1 14 1480d 1659d 0/1 auto-closed as invalid on 2022/05/18 11:30
linux-4.19 INFO: task hung in rtnetlink_rcv_msg (3) 1 8 1093d 1326d 0/1 upstream: reported on 2022/06/20 23:55
linux-4.19 INFO: task hung in rtnetlink_rcv_msg 1 11 1911d 2233d 0/1 auto-closed as invalid on 2021/03/12 19:03
upstream INFO: task hung in rtnetlink_rcv_msg (2) net 1 C inconclusive 548 319d 527d 0/29 closed as invalid on 2025/04/18 16:40
linux-6.1 INFO: task hung in rtnetlink_rcv_msg (3) origin:upstream 1 C error 20 26d 505d 0/3 upstream: reported C repro on 2024/09/19 14:16
linux-5.15 INFO: task hung in rtnetlink_rcv_msg (3) 1 1 295d 295d 0/3 auto-obsoleted due to no activity on 2025/07/26 04:34
upstream INFO: task hung in rtnetlink_rcv_msg net 1 C inconclusive inconclusive 1970 577d 2540d 26/29 fixed on 2024/07/09 19:14
linux-4.14 INFO: task hung in rtnetlink_rcv_msg 1 1 1072d 1072d 0/1 upstream: reported on 2023/03/01 21:15
linux-5.15 INFO: task hung in rtnetlink_rcv_msg (2) 1 70 448d 739d 0/3 auto-obsoleted due to no activity on 2025/01/24 13:11
android-6-12 INFO: task hung in rtnetlink_rcv_msg (2) 1 21 3h13m 15d 0/1 premoderation: reported on 2026/01/21 16:59
linux-6.1 INFO: task hung in rtnetlink_rcv_msg (2) 1 67 577d 741d 0/3 auto-obsoleted due to no activity on 2024/09/17 07:45
android-6-12 INFO: task hung in rtnetlink_rcv_msg 1 265 85d 230d 0/1 auto-obsoleted due to no activity on 2026/01/02 16:22
linux-6.6 INFO: task hung in rtnetlink_rcv_msg 1 3 3d12h 96d 0/2 upstream: reported on 2025/11/02 14:58
upstream INFO: task hung in rtnetlink_rcv_msg (3) net 1 4 245d 286d 0/29 auto-obsoleted due to no activity on 2025/09/03 19:16
upstream INFO: task hung in cangw_pernet_exit (3) can 1 syz unreliable 290 1501d 1607d 0/29 closed as invalid on 2022/02/08 10:22

Sample crash report:
INFO: task syz-executor.0:19183 blocked for more than 143 seconds.
      Not tainted 6.1.55-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:27256 pid:19183 ppid:3571   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6554
 schedule+0xbf/0x180 kernel/sched/core.c:6630
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6689
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 rtnl_lock net/core/rtnetlink.c:74 [inline]
 rtnetlink_rcv_msg+0x7c1/0xff0 net/core/rtnetlink.c:6121

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/28 03:31 linux-6.1.y d23900f974e0 c2ab1e5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in rtnetlink_rcv_msg
* Struck through repros no longer work on HEAD.