syzbot


INFO: task hung in slip_close

Status: auto-obsoleted due to no activity on 2024/09/09 11:39
Subsystems: net
[Documentation on labels]
First crash: 343d, last: 343d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in slip_close 1 1561d 1561d 0/1 auto-closed as invalid on 2021/06/09 16:54
upstream INFO: task hung in slip_close (2) net 1 119d 119d 0/28 auto-obsoleted due to no activity on 2025/04/21 05:27

Sample crash report:
INFO: task syz-executor.1:9286 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:25536 pid:9286  tgid:9286  ppid:8873   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 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+0x5b8/0x9c0 kernel/locking/mutex.c:752
 unregister_netdev+0x12/0x30 net/core/dev.c:11294
 slip_close+0x165/0x1c0 drivers/net/slip/slip.c:906
 tty_ldisc_close+0x111/0x1a0 drivers/tty/tty_ldisc.c:455
 tty_ldisc_kill+0x8e/0x150 drivers/tty/tty_ldisc.c:613
 tty_ldisc_release+0x116/0x2a0 drivers/tty/tty_ldisc.c:781
 tty_release_struct+0x23/0xe0 drivers/tty/tty_io.c:1696
 tty_release+0xe33/0x1420 drivers/tty/tty_io.c:1867
 __fput+0x408/0xbb0 fs/file_table.c:422
 task_work_run+0x14e/0x250 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+0x278/0x2a0 kernel/entry/common.c:218
 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5029e7cea9
RSP: 002b:00007fffed9e2508 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5029fb5980 RCX: 00007f5029e7cea9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5029fb5980 R08: 000000008aea135e R09: 0000001400000000
R10: 0000001b2e620000 R11: 0000000000000246 R12: 000000000005f54c
R13: 00007f5029fb3f8c R14: 0000000000000032 R15: 00007f5029fb5980
 </TASK>
INFO: task syz-executor.0:9306 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:26224 pid:9306  tgid:9303  ppid:8747   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0xf15/0x5d00 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0xe7/0x350 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+0x5b8/0x9c0 kernel/locking/mutex.c:752
 nl80211_pre_doit+0xb4/0xb10 net/wireless/nl80211.c:16405
 genl_family_rcv_msg_doit+0x1be/0x2f0 net/netlink/genetlink.c:1110
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/06/11 11:37 upstream 83a7eefedc9b c7d7d815 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in slip_close
* Struck through repros no longer work on HEAD.