syzbot

 sign-in | mailing list | source | docs
🐞 Open [802]
🐞 Fixed [135]
🐞 Invalid [933]
⬇ Missing Backports [77]
≡ 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: 770d, last: 770d
▶ ▼ Similar bugs (15)
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 845d 845d 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 1387d 1567d 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 1000d 1234d 0/1 upstream: reported on 2022/06/20 23:55
linux-4.19 INFO: task hung in rtnetlink_rcv_msg 1 11 1819d 2141d 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 226d 435d 0/29 closed as invalid on 2025/04/18 16:40
linux-6.1 INFO: task hung in rtnetlink_rcv_msg (3) origin:lts-only 1 syz error 18 92d 412d 0/3 upstream: reported syz repro on 2024/09/19 14:16
linux-5.15 INFO: task hung in rtnetlink_rcv_msg (3) 1 1 203d 203d 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 485d 2448d 26/29 fixed on 2024/07/09 19:14
linux-4.14 INFO: task hung in rtnetlink_rcv_msg 1 1 980d 980d 0/1 upstream: reported on 2023/03/01 21:15
linux-5.15 INFO: task hung in rtnetlink_rcv_msg (2) 1 70 355d 647d 0/3 auto-obsoleted due to no activity on 2025/01/24 13:11
linux-6.1 INFO: task hung in rtnetlink_rcv_msg (2) 1 67 484d 649d 0/3 auto-obsoleted due to no activity on 2024/09/17 07:45
android-6-12 INFO: task hung in rtnetlink_rcv_msg 1 243 1d09h 137d 0/1 premoderation: reported on 2025/06/21 07:28
linux-6.6 INFO: task hung in rtnetlink_rcv_msg 1 1 3d15h 3d15h 0/2 upstream: reported on 2025/11/02 14:58
upstream INFO: task hung in rtnetlink_rcv_msg (3) net 1 4 153d 193d 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 1409d 1515d 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.