syzbot


INFO: task hung in cfg80211_event_work (4)

Status: upstream: reported syz repro on 2024/10/10 15:19
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+5506b2556159a1ab6923@syzkaller.appspotmail.com
First crash: 41d, last: 23d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [wireless?] INFO: task hung in cfg80211_event_work (4) 3 (5) 2024/10/14 14:38
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in cfg80211_event_work (2) wireless C done error 3 245d 487d 0/28 auto-obsoleted due to no activity on 2024/06/18 14:16
upstream INFO: task hung in cfg80211_event_work (3) wireless 1 133d 133d 0/28 auto-obsoleted due to no activity on 2024/09/28 13:35
upstream INFO: task hung in cfg80211_event_work wireless C unreliable error 4 1394d 1427d 0/28 closed as invalid on 2022/02/08 10:49
linux-4.19 INFO: task hung in cfg80211_event_work 1 660d 660d 0/1 upstream: reported on 2023/01/21 03:03
Last patch testing requests (3)
Created Duration User Patch Repo Result
2024/11/02 04:16 16m retest repro upstream report log
2024/11/02 04:16 17m retest repro upstream report log
2024/10/14 02:53 20m lizhi.xu@windriver.com patch upstream report log

Sample crash report:
INFO: task kworker/u4:4:69 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4    state:D stack:20888 pid:69    tgid:69    ppid:2      flags:0x00004000
Workqueue: cfg80211 cfg80211_event_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 wiphy_lock include/net/cfg80211.h:6014 [inline]
 cfg80211_event_work+0x27/0x40 net/wireless/core.c:334
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task syz-executor:5221 blocked for more than 146 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:20304 pid:5221  tgid:5221  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4b4777fe8c
RSP: 002b:00007fff41d1b9b0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f4b48464620 RCX: 00007f4b4777fe8c
RDX: 0000000000000040 RSI: 00007f4b48464670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff41d1ba04 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f4b48464670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:5222 blocked for more than 150 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:20976 pid:5222  tgid:5222  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f850b57fe8c

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/19 04:10 upstream b04ae0f45168 cd6fc0a3 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: task hung in cfg80211_event_work
2024/10/07 01:30 upstream 2a130b7e1fcd d7906eff .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: task hung in cfg80211_event_work
2024/10/11 01:51 upstream d3d1556696c1 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in cfg80211_event_work
2024/10/11 00:34 upstream d3d1556696c1 8fbfc0c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in cfg80211_event_work
2024/09/30 08:34 upstream 9852d85ec9d4 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in cfg80211_event_work
* Struck through repros no longer work on HEAD.