syzbot

 sign-in | mailing list | source | docs
🐞 Open [717]
🐞 Fixed [181]
🐞 Invalid [640]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

INFO: task hung in rtnl_lock

Status: auto-closed as invalid on 2020/06/13 20:56
Reported-by: syzbot+c26c776aaac86f0d33bb@syzkaller.appspotmail.com
First crash: 2098d, last: 1987d
▶ ▼ Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in rtnl_lock 1 41 1996d 2097d 0/1 auto-closed as invalid on 2020/06/04 06:12
upstream INFO: task hung in rtnl_lock (2) net 1 1 1243d 1243d 0/29 auto-closed as invalid on 2022/05/28 17:21
android-6-12 INFO: task hung in rtnl_lock origin:upstream 1 syz 1224 1d04h 33d 0/1 premoderation: reported syz repro on 2025/06/21 03:33
linux-5.15 INFO: task hung in rtnl_lock (2) 1 1 562d 562d 0/3 auto-obsoleted due to no activity on 2024/04/18 21:58
android-49 INFO: task hung in rtnl_lock 1 7 2060d 2098d 0/3 auto-closed as invalid on 2020/04/01 22:32
linux-6.1 INFO: task hung in rtnl_lock 1 7 718d 841d 0/3 auto-obsoleted due to no activity on 2023/11/14 10:24
linux-6.1 INFO: task hung in rtnl_lock (2) origin:lts-only 1 C inconclusive 370 7h54m 591d 0/3 upstream: reported C repro on 2023/12/11 07:58
upstream INFO: task hung in rtnl_lock (3) net 1 C 128 490d 841d 25/29 fixed on 2024/03/26 17:39
linux-5.15 INFO: task hung in rtnl_lock (3) origin:upstream 1 C error 311 2d15h 430d 0/3 upstream: reported C repro on 2024/05/20 16:41
upstream INFO: task hung in rtnl_lock net 1 118 1898d 1844d 0/29 auto-closed as invalid on 2020/09/10 12:52
linux-5.15 INFO: task hung in rtnl_lock 1 4 715d 840d 0/3 auto-obsoleted due to no activity on 2023/11/17 15:29

Sample crash report:
EXT4-fs (loop1): ext4_check_descriptors: Inode bitmap for group 0 overlaps superblock
EXT4-fs (loop1): ext4_check_descriptors: Inode table for group 0 overlaps superblock
EXT4-fs (loop1): corrupt root inode, run e2fsck
EXT4-fs (loop1): mount failed
INFO: task kworker/u4:3:1169 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/u4:3    D27184  1169      2 0x80000000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3486
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908
 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72
 netdev_run_todo+0x1fa/0x770 net/core/dev.c:7919

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/02/14 20:55 linux-4.14.y e0f8b8a65a47 5d7b90f1 .config console log report ci2-linux-4-14
2020/02/12 21:16 linux-4.14.y e0f8b8a65a47 84f4fc8a .config console log report ci2-linux-4-14
2020/02/08 17:49 linux-4.14.y e0f8b8a65a47 06150bf1 .config console log report ci2-linux-4-14
2020/01/21 15:27 linux-4.14.y c1141b3aab36 8eda0b95 .config console log report ci2-linux-4-14
2020/01/15 18:05 linux-4.14.y c04fc6fa5c96 f9b69507 .config console log report ci2-linux-4-14
2020/01/15 11:51 linux-4.14.y c04fc6fa5c96 fa12bd3c .config console log report ci2-linux-4-14
2020/01/12 17:54 linux-4.14.y 6d0c334a400d 31290a45 .config console log report ci2-linux-4-14
2020/01/11 00:31 linux-4.14.y b0cdffaa546e 532ec44e .config console log report ci2-linux-4-14
2019/12/17 05:03 linux-4.14.y a844dc4c5442 d13d7958 .config console log report ci2-linux-4-14
2019/12/12 16:04 linux-4.14.y a844dc4c5442 d973f528 .config console log report ci2-linux-4-14
2019/11/11 21:51 linux-4.14.y 4762bcd451a9 377d77fa .config console log report ci2-linux-4-14
2019/10/26 22:36 linux-4.14.y b98aebd29824 25bb509e .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.