INFO: task hung in tunnel_key_exit_net (2)

Status: auto-closed as invalid on 2022/05/02 05:35
Reported-by: syzbot+7b32daef9a262a42e197@syzkaller.appspotmail.com
First crash: 1918d, last: 1688d
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in tunnel_key_exit_net 1 1 2205d 2205d 0/1 auto-closed as invalid on 2020/12/02 03:23
upstream INFO: task hung in tunnel_key_exit_net net 1 syz 8 2685d 3061d 0/29 closed as dup on 2018/03/31 15:45
upstream INFO: task hung in tunnel_key_exit_net (2) net 1 2 788d 795d 0/29 auto-obsoleted due to no activity on 2024/09/18 19:33

Sample crash report:
INFO: task syz-executor.4:21340 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.
syz-executor.4  D27136 21340  17581 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
 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
 tc_action_net_exit include/net/act_api.h:135 [inline]
 tunnel_key_exit_net+0x22/0x360 net/sched/act_tunnel_key.c:591
 ops_exit_list+0xf9/0x150 net/core/net_namespace.c:156
 setup_net+0x3d1/0x720 net/core/net_namespace.c:333
 copy_net_ns+0x1f7/0x340 net/core/net_namespace.c:439
 create_new_namespaces+0x3f6/0x7b0 kernel/nsproxy.c:107
 copy_namespaces+0x325/0x3c0 kernel/nsproxy.c:165
 copy_process.part.0+0x3a59/0x8260 kernel/fork.c:1916
 copy_process kernel/fork.c:1710 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2219
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f192a1bbe99
Code: Bad RIP value.
RSP: 002b:00007f1928b31168 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f192a2cef60 RCX: 00007f192a1bbe99
RDX: 0000000020000880 RSI: 0000000020000c00 RDI: 0000000040000000
RBP: 00007f192a215ff1 R08: 0000000020000cc0 R09: 0000000000000000
R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6d14644f R14: 00007f1928b31300 R15: 0000000000022000
INFO: task kworker/0:33:2865 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.
kworker/0:33    D29776  2865      2 0x80000000
Workqueue: events linkwatch_event
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/01/02 05:35 linux-4.19.y 3f8a27f9e27b e1768e9c .config console log report info ci2-linux-4-19 INFO: task hung in tunnel_key_exit_net
2021/09/30 17:58 linux-4.19.y c2276d585654 0f01403d .config console log report info ci2-linux-4-19 INFO: task hung in tunnel_key_exit_net
2021/09/30 12:16 linux-4.19.y c2276d585654 be530f6c .config console log report info ci2-linux-4-19 INFO: task hung in tunnel_key_exit_net
2021/08/18 09:28 linux-4.19.y 59456c9cc40c a2fe1cb5 .config console log report info ci2-linux-4-19 INFO: task hung in tunnel_key_exit_net
2021/07/26 04:52 linux-4.19.y 4938296e03bd 4d1b57d4 .config console log report info ci2-linux-4-19 INFO: task hung in tunnel_key_exit_net
2021/05/17 11:39 linux-4.19.y 3c8c23092588 a2eb125d .config console log report info ci2-linux-4-19 INFO: task hung in tunnel_key_exit_net
* Struck through repros no longer work on HEAD.