syzbot


INFO: task hung in cangw_pernet_exit_batch (2)

Status: upstream: reported on 2024/05/22 02:43
Reported-by: syzbot+c9d15cd4de792df3ae31@syzkaller.appspotmail.com
First crash: 34d, last: 6d15h
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in cangw_pernet_exit_batch (2) can 16 340d 597d 0/27 auto-obsoleted due to no activity on 2023/10/19 02:51
upstream INFO: task hung in cangw_pernet_exit_batch (3) can 31 4d06h 1d12h 23/27 upstream: reported on 2024/06/23 15:29
upstream INFO: task hung in cangw_pernet_exit_batch can 11 714d 727d 0/27 auto-obsoleted due to no activity on 2022/10/09 07:17
linux-6.1 INFO: task hung in cangw_pernet_exit_batch 2 385d 405d 0/3 auto-obsoleted due to no activity on 2023/09/13 14:11

Sample crash report:
INFO: task kworker/u4:6:3704 blocked for more than 143 seconds.
      Not tainted 6.1.94-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:6    state:D stack:22688 pid:3704  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 cangw_pernet_exit_batch+0x1c/0x90 net/can/gw.c:1250
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x763/0xb60 net/core/net_namespace.c:604
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/18 12:36 linux-6.1.y eb44d83053d6 639d6cdf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/16 14:59 linux-6.1.y eb44d83053d6 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/15 07:12 linux-6.1.y ae9f2a70d69e f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/15 07:10 linux-6.1.y ae9f2a70d69e f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/14 14:51 linux-6.1.y ae9f2a70d69e 8d849073 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/13 22:49 linux-6.1.y ae9f2a70d69e a9616ff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/13 15:00 linux-6.1.y ae9f2a70d69e a9616ff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/10 16:42 linux-6.1.y 88690811da69 048c640a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/10 02:45 linux-6.1.y 88690811da69 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/07 21:16 linux-6.1.y 88690811da69 82c05ab8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/06 05:40 linux-6.1.y 88690811da69 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/05 16:42 linux-6.1.y 88690811da69 5aa1a7c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/05 01:27 linux-6.1.y 88690811da69 e1e2c66e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/06/03 22:55 linux-6.1.y 88690811da69 a1feae05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/05/28 18:48 linux-6.1.y 88690811da69 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/05/22 06:57 linux-6.1.y 4078fa637fcd 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/05/22 02:53 linux-6.1.y 4078fa637fcd 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
2024/05/22 02:42 linux-6.1.y 4078fa637fcd 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in cangw_pernet_exit_batch
* Struck through repros no longer work on HEAD.