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INFO: task hung in ip6mr_net_exit_batch (4)

Status: auto-obsoleted due to no activity on 2026/05/09 08:46
Subsystems: net
[Documentation on labels]
First crash: 122d, last: 94d
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
a2f2218c-ec9e-4b96-a172-3b417afda279 repro 💥 INFO: task hung in ip6mr_net_exit_batch (4) 2026/03/10 13:49 2026/03/11 19:52 2026/03/12 12:17 86914af9098a80da53c3c5d46be980c572ee29f8 doRequest: error sending request: Post "https://generativelanguage.googleapis.com/v1beta/models/gemini-3-pro-preview:generateContent": http2: server sent GOAWAY and closed the connection; LastStreamID=1, ErrCode=NO_ERROR, debug="server_shutting_down"
Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in ip6mr_net_exit_batch (2) net 1 8 568d 716d 0/29 auto-obsoleted due to no activity on 2025/01/20 02:05
upstream INFO: task hung in ip6mr_net_exit_batch net 1 1 1038d 1038d 0/29 closed as invalid on 2023/09/07 14:36
upstream INFO: task hung in ip6mr_net_exit_batch (3) net 1 3 419d 455d 0/29 auto-obsoleted due to no activity on 2025/06/18 09:05

Sample crash report:
INFO: task syz-executor:25198 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23768 pid:25198 tgid:25198 ppid:1      task_flags:0x400140 flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5260 [inline]
 __schedule+0x14ea/0x5050 kernel/sched/core.c:6867
 __schedule_loop kernel/sched/core.c:6949 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:6964
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7021
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x7fe/0x1300 kernel/locking/mutex.c:776
 ip6mr_net_exit_batch+0x20/0x90 net/ipv6/ip6mr.c:1376
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x52b/0x940 net/core/net_namespace.c:252
 setup_net+0x2f0/0x340 net/core/net_namespace.c:462
 copy_net_ns+0x50e/0x730 net/core/net_namespace.c:581
 create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:130
 unshare_nsproxy_namespaces+0x11a/0x160 kernel/nsproxy.c:226
 ksys_unshare+0x4f4/0x900 kernel/fork.c:3171
 __do_sys_unshare kernel/fork.c:3242 [inline]
 __se_sys_unshare kernel/fork.c:3240 [inline]
 __x64_sys_unshare+0x38/0x50 kernel/fork.c:3240
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff142b9c1a7
RSP: 002b:00007ffdcabe3808 EFLAGS: 00000206 ORIG_RAX: 0000000000000110

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/08 08:38 net-next 57be33f85e36 4c131dc4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in ip6mr_net_exit_batch
2026/01/11 18:57 net-next 60d8484c4cec d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in ip6mr_net_exit_batch
* Struck through repros no longer work on HEAD.