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INFO: task hung in ipv6_sock_mc_close

Status: auto-obsoleted due to no activity on 2024/09/14 02:16
Subsystems: net
[Documentation on labels]
First crash: 269d, last: 247d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in ipv6_sock_mc_close (2) net 1 114d 114d 0/28 auto-obsoleted due to no activity on 2025/01/25 10:26
linux-6.1 INFO: task hung in ipv6_sock_mc_close 1 260d 260d 0/3 auto-obsoleted due to no activity on 2024/09/11 11:28

Sample crash report:
INFO: task syz-executor.4:9277 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00249-gbe27b8965297 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:24672 pid:9277  tgid:9277  ppid:5107   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 ipv6_sock_mc_close+0xc9/0x140 net/ipv6/mcast.c:354
 inet6_release+0x47/0x70 net/ipv6/af_inet6.c:484
 __sock_release net/socket.c:659 [inline]
 sock_close+0xbc/0x240 net/socket.c:1421
 __fput+0x406/0x8b0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82c067cea9
RSP: 002b:00007ffcce109e28 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f82c07b5980 RCX: 00007f82c067cea9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f82c07b5980 R08: 000000008136572d R09: 0000001d00000000
R10: 0000000080000000 R11: 0000000000000246 R12: 000000000002448c
R13: 00007f82c07b405c R14: 0000000000000032 R15: 00007f82c07b5980
 </TASK>
INFO: task syz-executor.3:9282 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc2-syzkaller-00249-gbe27b8965297 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:24672 pid:9282  tgid:9282  ppid:5112   flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x17e8/0x4a20 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6894
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752


Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/16 02:09 net be27b8965297 f429ab00 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in ipv6_sock_mc_close
2024/05/25 07:04 net-next 66ad4829ddd0 a10a183e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in ipv6_sock_mc_close
* Struck through repros no longer work on HEAD.