syzbot

INFO: task kworker/u8:11:9608 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:11   state:D stack:21968 pid:9608  tgid:9608  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 kernel/sched/core.c:6745
 __schedule_loop kernel/sched/core.c:6822 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6837
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
 __flush_work+0xaa9/0xd00 kernel/workqueue.c:4227
 __cancel_work_sync+0xbc/0x110 kernel/workqueue.c:4347
 wiphy_unregister+0x57e/0xaa0 net/wireless/core.c:1135
 ieee80211_unregister_hw+0x1e2/0x2c0 net/mac80211/main.c:1681
 mac80211_hwsim_del_radio+0x2c2/0x4c0 drivers/net/wireless/virtual/mac80211_hwsim.c:5576
 hwsim_exit_net+0x5c1/0x670 drivers/net/wireless/virtual/mac80211_hwsim.c:6453
 ops_exit_list net/core/net_namespace.c:173 [inline]
 cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 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 kworker/u8:20:9636 blocked for more than 143 seconds.
      Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:20   state:D stack:21040 pid:9636  tgid:9636  ppid:2      flags:0x00004000
Workqueue: cfg80211 cfg80211_dfs_channels_update_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 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
 cfg80211_dfs_channels_update_work+0xbf/0x610 net/wireless/mlme.c:1021
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 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:13709 blocked for more than 144 seconds.
      Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:24992 pid:13709 tgid:13709 ppid:13693  flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5408 [inline]
 __schedule+0x1796/0x49d0 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
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2192
 __do_sys_sendto net/socket.c:2204 [inline]
 __se_sys_sendto net/socket.c:2200 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2200
 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: 0033:0x7f9e67d7796c
RSP: 002b:00007fff89b44a40 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f9e68a34620 RCX: 00007f9e67d7796c
RDX: 0000000000000028 RSI: 00007f9e68a34670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff89b44a94 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f9e68a34670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by kthreadd/2:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x21f1/0x3dc0 kernel/fork.c:2486
1 lock held by kworker/u8:1/12:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by khungtaskd/30:
 #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
 #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
 #0: ffffffff8e333f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
1 lock held by hwrng/758:
 #0: ffffffff8eb21068 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xf0/0x3c0 drivers/char/hw_random/core.c:495
3 locks held by kworker/1:2/929:
3 locks held by kworker/0:3/932:
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff888015080948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc90004017d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc90004017d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by kworker/u8:5/1092:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:6/1100:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:7/2474:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by dhcpcd/4747:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: copy_process+0x21f1/0x3dc0 kernel/fork.c:2486
2 locks held by getty/4838:
 #0: ffff88802abfb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002f162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
2 locks held by kworker/1:4/5139:
1 lock held by kworker/u8:8/5227:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:9/6437:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
3 locks held by kworker/u8:11/9608:
 #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff888015ed3148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc900121f7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc900121f7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffffffff8f5c8190 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
3 locks held by kworker/u8:12/9611:
 #0: ffff88802a1b8948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff88802a1b8948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc9000c91fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc9000c91fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193
1 lock held by kworker/u8:14/9617:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:18/9632:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
3 locks held by kworker/u8:20/9636:
 #0: ffff888015fef948 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3223 [inline]
 #0: ffff888015fef948 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3329
 #1: ffffc900096c7d00 ((work_completion)(&(&rdev->dfs_update_channels_wk)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3224 [inline]
 #1: ffffc900096c7d00 ((work_completion)(&(&rdev->dfs_update_channels_wk)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3329
 #2: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: cfg80211_dfs_channels_update_work+0xbf/0x610 net/wireless/mlme.c:1021
1 lock held by kworker/u8:21/9639:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:23/9646:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:24/9648:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by kworker/u8:25/9650:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by syz-executor/13693:
 #0: ffffffff8e362110 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: do_exit+0x6b4/0x27e0 kernel/exit.c:833
1 lock held by syz-executor/13709:
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz.2.3091/13720:
1 lock held by syz.1.3092/13722:
1 lock held by syz-executor/13732:
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: __rtnl_newlink net/core/rtnetlink.c:3720 [inline]
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_newlink+0xab5/0x20a0 net/core/rtnetlink.c:3743
6 locks held by syz-executor/13738:
1 lock held by syz-executor/13741:
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632
1 lock held by syz-executor/13743:
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8f5d49c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x842/0x1180 net/core/rtnetlink.c:6632

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xfde/0x1020 kernel/hung_task.c:379
 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>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 13718 Comm: syz.0.3090 Not tainted 6.10.0-rc6-syzkaller-00069-g795c58e4c7fc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:do_raw_spin_unlock+0x0/0x8b0 kernel/locking/spinlock_debug.c:139
Code: 38 c1 0f 8c 27 ff ff ff e8 ed c3 84 00 e9 1d ff ff ff e8 63 56 09 0a 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 28 49 89 ff 48
RSP: 0018:ffffc90009187b88 EFLAGS: 00000046
RAX: cfc7ca1142c18400 RBX: ffff88802ac665c0 RCX: ffffc90009187a03
RDX: 0000000000000000 RSI: ffffffff8bcaccc0 RDI: ffff88802ac665c0
RBP: ffffc90009187c70 R08: ffffffff8fac216f R09: 1ffffffff1f5842d
R10: dffffc0000000000 R11: fffffbfff1f5842e R12: dffffc0000000000
R13: 0000000000000021 R14: ffffc90009187e20 R15: ffff888043f76318
FS:  00007fda2f8896c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002006b000 CR3: 000000006193e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __raw_spin_unlock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_unlock+0x1e/0x50 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 dequeue_signal+0x241/0x5a0 kernel/signal.c:695
 get_signal+0x602/0x1740 kernel/signal.c:2788
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xc9/0x360 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda2eb75bd7
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 <0f> 05 48 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007fda2f8890f8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fda2ed03f68 RCX: 00007fda2eb75bd9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fda2ed03f68
RBP: 00007fda2ed03f60 R08: 00007fda2f8896c0 R09: 00007fda2f8896c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fda2ed03f6c
R13: 000000000000000b R14: 00007ffed3f92570 R15: 00007ffed3f92658
 </TASK>