[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.224' (ECDSA) to the list of known hosts. syzkaller login: [ 480.128837][ T8499] IPVS: ftp: loaded support on port[0] = 21 [ 480.217265][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 480.225273][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 480.268453][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 480.289752][ T8508] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 480.306964][ T8508] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program executing program [ 480.319983][ T35] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 721.656709][ T1634] INFO: task kworker/0:2:8 blocked for more than 143 seconds. [ 721.664368][ T1634] Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 721.672555][ T1634] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.682132][ T1634] task:kworker/0:2 state:D stack:25800 pid: 8 ppid: 2 flags:0x00004000 [ 721.692490][ T1634] Workqueue: events disconnect_work [ 721.698789][ T1634] Call Trace: [ 721.702102][ T1634] __schedule+0x911/0x2160 [ 721.708224][ T1634] ? io_schedule_timeout+0x140/0x140 [ 721.713552][ T1634] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.720612][ T1634] ? lockdep_hardirqs_on+0x79/0x100 [ 721.725869][ T1634] schedule+0xcf/0x270 [ 721.731808][ T1634] schedule_preempt_disabled+0xf/0x20 [ 721.738301][ T1634] __mutex_lock+0x81f/0x1120 [ 721.742931][ T1634] ? disconnect_work+0x18/0x200 [ 721.749268][ T1634] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.754689][ T1634] ? lock_downgrade+0x6e0/0x6e0 [ 721.761133][ T1634] disconnect_work+0x18/0x200 [ 721.765853][ T1634] process_one_work+0x98d/0x1600 [ 721.772250][ T1634] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.778637][ T1634] ? rwlock_bug.part.0+0x90/0x90 [ 721.783606][ T1634] ? _raw_spin_lock_irq+0x41/0x50 [ 721.790195][ T1634] worker_thread+0x64c/0x1120 [ 721.794919][ T1634] ? __kthread_parkme+0x13f/0x1e0 [ 721.801396][ T1634] ? process_one_work+0x1600/0x1600 [ 721.807774][ T1634] kthread+0x3b1/0x4a0 [ 721.811884][ T1634] ? __kthread_bind_mask+0xc0/0xc0 [ 721.819555][ T1634] ret_from_fork+0x1f/0x30 [ 721.824165][ T1634] INFO: task kworker/1:1:35 blocked for more than 143 seconds. [ 721.833339][ T1634] Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 721.842082][ T1634] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.851839][ T1634] task:kworker/1:1 state:D stack:27920 pid: 35 ppid: 2 flags:0x00004000 [ 721.862362][ T1634] Workqueue: ipv6_addrconf addrconf_dad_work [ 721.869373][ T1634] Call Trace: [ 721.872679][ T1634] __schedule+0x911/0x2160 [ 721.878494][ T1634] ? io_schedule_timeout+0x140/0x140 [ 721.883821][ T1634] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.890438][ T1634] ? lockdep_hardirqs_on+0x79/0x100 [ 721.895673][ T1634] schedule+0xcf/0x270 [ 721.901304][ T1634] schedule_preempt_disabled+0xf/0x20 [ 721.907632][ T1634] __mutex_lock+0x81f/0x1120 [ 721.912255][ T1634] ? addrconf_dad_work+0xa3/0x12b0 [ 721.918765][ T1634] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.924172][ T1634] ? debug_object_deactivate+0x264/0x300 [ 721.931531][ T1634] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 721.938495][ T1634] addrconf_dad_work+0xa3/0x12b0 [ 721.943500][ T1634] ? addrconf_dad_completed+0xc70/0xc70 [ 721.950495][ T1634] process_one_work+0x98d/0x1600 [ 721.955710][ T1634] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.962519][ T1634] ? rwlock_bug.part.0+0x90/0x90 [ 721.968875][ T1634] ? _raw_spin_lock_irq+0x41/0x50 [ 721.973958][ T1634] worker_thread+0x64c/0x1120 [ 721.980110][ T1634] ? __kthread_parkme+0x13f/0x1e0 [ 721.985173][ T1634] ? process_one_work+0x1600/0x1600 [ 721.992143][ T1634] kthread+0x3b1/0x4a0 [ 721.996248][ T1634] ? __kthread_bind_mask+0xc0/0xc0 [ 722.002726][ T1634] ret_from_fork+0x1f/0x30 [ 722.008349][ T1634] INFO: task syz-executor573:8541 can't die for more than 143 seconds. [ 722.017664][ T1634] task:syz-executor573 state:R running task stack:25992 pid: 8541 ppid: 8499 flags:0x00004006 [ 722.029427][ T1634] Call Trace: [ 722.032733][ T1634] ? __schedule+0x919/0x2160 [ 722.038974][ T1634] ? mark_held_locks+0x9f/0xe0 [ 722.043777][ T1634] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 722.052010][ T1634] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 722.059120][ T1634] ? lockdep_hardirqs_on+0x79/0x100 [ 722.064485][ T1634] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 722.072065][ T1634] ? ieee80211_chanctx_radar_detect+0x26a/0x420 [ 722.079367][ T1634] ? ieee80211_chanctx_radar_detect+0x23d/0x420 [ 722.085646][ T1634] ? __sanitizer_cov_trace_pc+0xd/0x60 [ 722.092734][ T1634] ? ieee80211_chanctx_radar_detect+0x2c4/0x420 [ 722.100213][ T1634] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.107507][ T1634] ? ieee80211_chanctx_radar_detect+0x2c9/0x420 [ 722.113792][ T1634] ? ieee80211_check_combinations+0x3b9/0x890 [ 722.121689][ T1634] ? ieee80211_recalc_dtim+0x240/0x240 [ 722.128069][ T1634] ? ieee80211_check_concurrent_iface+0x454/0x620 [ 722.134584][ T1634] ? ieee80211_if_change_type+0x288/0x6e0 [ 722.141745][ T1634] ? ieee80211_change_iface+0x26/0x210 [ 722.148141][ T1634] ? cfg80211_change_iface+0x335/0xf30 [ 722.153707][ T1634] ? nl80211_set_interface+0x65c/0x8d0 [ 722.160643][ T1634] ? nl80211_notify_iface+0x180/0x180 [ 722.166056][ T1634] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.173742][ T1634] ? nl80211_pre_doit+0xa6/0x5c0 [ 722.179595][ T1634] ? genl_family_rcv_msg_doit+0x228/0x320 [ 722.185427][ T1634] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 722.194633][ T1634] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.201901][ T1634] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.209107][ T1634] ? ns_capable+0xde/0x100 [ 722.213644][ T1634] ? genl_rcv_msg+0x328/0x580 [ 722.219679][ T1634] ? genl_get_cmd+0x480/0x480 [ 722.224385][ T1634] ? nl80211_notify_iface+0x180/0x180 [ 722.231488][ T1634] ? lock_release+0x720/0x720 [ 722.236206][ T1634] ? netlink_rcv_skb+0x153/0x420 [ 722.242653][ T1634] ? genl_get_cmd+0x480/0x480 [ 722.248778][ T1634] ? netlink_ack+0xaa0/0xaa0 [ 722.253416][ T1634] ? genl_rcv+0x24/0x40 [ 722.259043][ T1634] ? netlink_unicast+0x533/0x7d0 [ 722.264103][ T1634] ? netlink_attachskb+0x870/0x870 [ 722.270651][ T1634] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.277812][ T1634] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.284120][ T1634] ? __phys_addr_symbol+0x2c/0x70 [ 722.291346][ T1634] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.298053][ T1634] ? __check_object_size+0x171/0x3f0 [ 722.303431][ T1634] ? netlink_sendmsg+0x856/0xd90 [ 722.310053][ T1634] ? netlink_unicast+0x7d0/0x7d0 [ 722.315043][ T1634] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.322765][ T1634] ? netlink_unicast+0x7d0/0x7d0 [ 722.328635][ T1634] ? sock_sendmsg+0xcf/0x120 [ 722.333369][ T1634] ? ____sys_sendmsg+0x6e8/0x810 [ 722.339739][ T1634] ? kernel_sendmsg+0x50/0x50 [ 722.344447][ T1634] ? do_recvmmsg+0x6d0/0x6d0 [ 722.350420][ T1634] ? lock_chain_count+0x20/0x20 [ 722.355307][ T1634] ? find_held_lock+0x2d/0x110 [ 722.361841][ T1634] ? ___sys_sendmsg+0xf3/0x170 [ 722.367766][ T1634] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.373118][ T1634] ? __lock_acquire+0x16a7/0x5230 [ 722.379960][ T1634] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.386133][ T1634] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.393925][ T1634] ? __fget_light+0x215/0x280 [ 722.399669][ T1634] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.405958][ T1634] ? __sys_sendmsg+0xe5/0x1b0 [ 722.412160][ T1634] ? __sys_sendmsg_sock+0x30/0x30 [ 722.418150][ T1634] ? __context_tracking_enter+0xef/0x100 [ 722.423836][ T1634] ? syscall_enter_from_user_mode+0x27/0x70 [ 722.431293][ T1634] ? do_syscall_64+0x2d/0x70 [ 722.435917][ T1634] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 722.443541][ T1634] INFO: task kworker/0:0:8542 blocked for more than 144 seconds. [ 722.452380][ T1634] Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 722.460661][ T1634] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 722.470251][ T1634] task:kworker/0:0 state:D stack:29160 pid: 8542 ppid: 2 flags:0x00004000 [ 722.480430][ T1634] Workqueue: ipv6_addrconf addrconf_dad_work [ 722.486449][ T1634] Call Trace: [ 722.491412][ T1634] __schedule+0x911/0x2160 [ 722.495873][ T1634] ? io_schedule_timeout+0x140/0x140 [ 722.502761][ T1634] ? _raw_spin_unlock_irq+0x1f/0x40 [ 722.509117][ T1634] ? lockdep_hardirqs_on+0x79/0x100 [ 722.514356][ T1634] schedule+0xcf/0x270 [ 722.519940][ T1634] schedule_preempt_disabled+0xf/0x20 [ 722.525354][ T1634] __mutex_lock+0x81f/0x1120 [ 722.531904][ T1634] ? addrconf_dad_work+0xa3/0x12b0 [ 722.537931][ T1634] ? mutex_lock_io_nested+0xf70/0xf70 [ 722.543343][ T1634] ? debug_object_deactivate+0x264/0x300 [ 722.550343][ T1634] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.556381][ T1634] addrconf_dad_work+0xa3/0x12b0 [ 722.563011][ T1634] ? addrconf_dad_completed+0xc70/0xc70 [ 722.569574][ T1634] process_one_work+0x98d/0x1600 [ 722.574644][ T1634] ? pwq_dec_nr_in_flight+0x320/0x320 [ 722.581568][ T1634] ? rwlock_bug.part.0+0x90/0x90 [ 722.587481][ T1634] ? _raw_spin_lock_irq+0x41/0x50 [ 722.592552][ T1634] worker_thread+0x64c/0x1120 [ 722.598955][ T1634] ? __kthread_parkme+0x13f/0x1e0 [ 722.604040][ T1634] ? process_one_work+0x1600/0x1600 [ 722.610732][ T1634] kthread+0x3b1/0x4a0 [ 722.614840][ T1634] ? __kthread_bind_mask+0xc0/0xc0 [ 722.621672][ T1634] ret_from_fork+0x1f/0x30 [ 722.626176][ T1634] INFO: task kworker/1:0:8543 blocked for more than 144 seconds. [ 722.636089][ T1634] Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 722.644308][ T1634] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 722.653902][ T1634] task:kworker/1:0 state:D stack:29744 pid: 8543 ppid: 2 flags:0x00004000 [ 722.664090][ T1634] Workqueue: events linkwatch_event [ 722.670605][ T1634] Call Trace: [ 722.673907][ T1634] __schedule+0x911/0x2160 [ 722.679785][ T1634] ? io_schedule_timeout+0x140/0x140 [ 722.685107][ T1634] ? _raw_spin_unlock_irq+0x25/0x40 [ 722.691714][ T1634] schedule+0xcf/0x270 [ 722.695840][ T1634] schedule_preempt_disabled+0xf/0x20 [ 722.702585][ T1634] __mutex_lock+0x81f/0x1120 [ 722.708169][ T1634] ? linkwatch_event+0xb/0x60 [ 722.712886][ T1634] ? mutex_lock_io_nested+0xf70/0xf70 [ 722.719856][ T1634] ? lock_release+0x720/0x720 [ 722.724597][ T1634] linkwatch_event+0xb/0x60 [ 722.730527][ T1634] process_one_work+0x98d/0x1600 [ 722.735513][ T1634] ? pwq_dec_nr_in_flight+0x320/0x320 [ 722.742429][ T1634] ? rwlock_bug.part.0+0x90/0x90 [ 722.749028][ T1634] ? _raw_spin_lock_irq+0x41/0x50 [ 722.754109][ T1634] worker_thread+0x64c/0x1120 [ 722.760365][ T1634] ? __kthread_parkme+0x13f/0x1e0 [ 722.765426][ T1634] ? process_one_work+0x1600/0x1600 [ 722.772252][ T1634] kthread+0x3b1/0x4a0 [ 722.776356][ T1634] ? __kthread_bind_mask+0xc0/0xc0 [ 722.782845][ T1634] ret_from_fork+0x1f/0x30 [ 722.788237][ T1634] [ 722.788237][ T1634] Showing all locks held in the system: [ 722.795985][ T1634] 3 locks held by kworker/0:2/8: [ 722.803628][ T1634] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.815111][ T1634] #1: ffffc90000cd7da8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.826814][ T1634] #2: ffffffff8d688028 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0x18/0x200 [ 722.836024][ T1634] 3 locks held by kworker/1:1/35: [ 722.842681][ T1634] #0: ffff88802452c138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.854725][ T1634] #1: ffffc90000e5fda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.868205][ T1634] #2: ffffffff8d688028 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x12b0 [ 722.879055][ T1634] 1 lock held by khungtaskd/1634: [ 722.884089][ T1634] #0: ffffffff8bf75360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 722.895846][ T1634] 1 lock held by in:imklog/8130: [ 722.901943][ T1634] #0: ffff888027f3b270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 722.912080][ T1634] 4 locks held by syz-executor573/8541: [ 722.918543][ T1634] 3 locks held by kworker/0:0/8542: [ 722.923759][ T1634] #0: ffff88802452c138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.936365][ T1634] #1: ffffc9000174fda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.949730][ T1634] #2: ffffffff8d688028 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x12b0 [ 722.960390][ T1634] 3 locks held by kworker/1:0/8543: [ 722.965610][ T1634] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.977549][ T1634] #1: ffffc9000172fda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.989207][ T1634] #2: ffffffff8d688028 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 [ 722.999343][ T1634] [ 723.001680][ T1634] ============================================= [ 723.001680][ T1634] [ 723.013040][ T1634] NMI backtrace for cpu 0 [ 723.017607][ T1634] CPU: 0 PID: 1634 Comm: khungtaskd Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 723.027171][ T1634] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.037273][ T1634] Call Trace: [ 723.040565][ T1634] dump_stack+0x141/0x1d7 [ 723.045033][ T1634] nmi_cpu_backtrace.cold+0x44/0xd7 [ 723.050253][ T1634] ? lapic_can_unplug_cpu+0x80/0x80 [ 723.055526][ T1634] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 723.061568][ T1634] watchdog+0xd8e/0xf40 [ 723.065743][ T1634] ? trace_sched_process_hang+0x280/0x280 [ 723.071500][ T1634] kthread+0x3b1/0x4a0 [ 723.075593][ T1634] ? __kthread_bind_mask+0xc0/0xc0 [ 723.080725][ T1634] ret_from_fork+0x1f/0x30 [ 723.085281][ T1634] Sending NMI from CPU 0 to CPUs 1: [ 723.091507][ C1] NMI backtrace for cpu 1 [ 723.091518][ C1] CPU: 1 PID: 8541 Comm: syz-executor573 Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 723.091529][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.091539][ C1] RIP: 0010:check_kcov_mode+0x2c/0x40 [ 723.091551][ C1] Code: 05 49 d1 8d 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 3c 15 00 00 85 d2 74 0b 8b 86 18 15 00 00 <39> f8 0f 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0 [ 723.091569][ C1] RSP: 0018:ffffc900014ff2c8 EFLAGS: 00000246 [ 723.091584][ C1] RAX: 0000000000000000 RBX: ffff88801ccc0c00 RCX: ffff888014eb9c80 [ 723.091594][ C1] RDX: 0000000000000000 RSI: ffff888014eb9c80 RDI: 0000000000000003 [ 723.091604][ C1] RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 [ 723.091614][ C1] R10: ffffffff886b49fa R11: 0000000000000000 R12: 0000000000000000 [ 723.091624][ C1] R13: ffff888013ecf920 R14: dffffc0000000000 R15: 0000000000000000 [ 723.091634][ C1] FS: 0000000002108300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 723.091644][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 723.091653][ C1] CR2: 00007f859715a000 CR3: 0000000013d47000 CR4: 00000000001506e0 [ 723.091663][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 723.091673][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 723.091681][ C1] Call Trace: [ 723.091687][ C1] __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 723.091695][ C1] ieee80211_chanctx_radar_detect+0x26a/0x420 [ 723.091703][ C1] ieee80211_check_combinations+0x3b9/0x890 [ 723.091711][ C1] ? ieee80211_recalc_dtim+0x240/0x240 [ 723.091718][ C1] ieee80211_check_concurrent_iface+0x454/0x620 [ 723.091726][ C1] ieee80211_if_change_type+0x288/0x6e0 [ 723.091734][ C1] ieee80211_change_iface+0x26/0x210 [ 723.091741][ C1] cfg80211_change_iface+0x335/0xf30 [ 723.091748][ C1] nl80211_set_interface+0x65c/0x8d0 [ 723.091755][ C1] ? nl80211_notify_iface+0x180/0x180 [ 723.091762][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 723.091770][ C1] ? nl80211_pre_doit+0xa6/0x5c0 [ 723.091781][ C1] genl_family_rcv_msg_doit+0x228/0x320 [ 723.091788][ C1] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 723.091795][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 723.091802][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 723.091806][ C1] ? ns_capable+0xde/0x100 [ 723.091809][ C1] genl_rcv_msg+0x328/0x580 [ 723.091813][ C1] ? genl_get_cmd+0x480/0x480 [ 723.091816][ C1] ? nl80211_notify_iface+0x180/0x180 [ 723.091820][ C1] ? lock_release+0x720/0x720 [ 723.091823][ C1] netlink_rcv_skb+0x153/0x420 [ 723.091826][ C1] ? genl_get_cmd+0x480/0x480 [ 723.091830][ C1] ? netlink_ack+0xaa0/0xaa0 [ 723.091833][ C1] genl_rcv+0x24/0x40 [ 723.091836][ C1] netlink_unicast+0x533/0x7d0 [ 723.091839][ C1] ? netlink_attachskb+0x870/0x870 [ 723.091843][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 723.091847][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 723.091851][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 723.091855][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 723.091859][ C1] ? __check_object_size+0x171/0x3f0 [ 723.091862][ C1] netlink_sendmsg+0x856/0xd90 [ 723.091866][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 723.091870][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 723.091874][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 723.091877][ C1] sock_sendmsg+0xcf/0x120 [ 723.091880][ C1] ____sys_sendmsg+0x6e8/0x810 [ 723.091884][ C1] ? kernel_sendmsg+0x50/0x50 [ 723.091887][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 723.091890][ C1] ? lock_chain_count+0x20/0x20 [ 723.091894][ C1] ? find_held_lock+0x2d/0x110 [ 723.091897][ C1] ___sys_sendmsg+0xf3/0x170 [ 723.091900][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 723.091904][ C1] ? __lock_acquire+0x16a7/0x5230 [ 723.091907][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 723.091911][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 723.091915][ C1] ? __fget_light+0x215/0x280 [ 723.091919][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 723.091923][ C1] __sys_sendmsg+0xe5/0x1b0 [ 723.091926][ C1] ? __sys_sendmsg_sock+0x30/0x30 [ 723.091930][ C1] ? __context_tracking_enter+0xef/0x100 [ 723.091934][ C1] ? syscall_enter_from_user_mode+0x27/0x70 [ 723.091937][ C1] do_syscall_64+0x2d/0x70 [ 723.091941][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 723.091944][ C1] RIP: 0033:0x441339 [ 723.091950][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 [ 723.091960][ C1] RSP: 002b:00007ffcd96ba4c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 723.091969][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441339 [ 723.091974][ C1] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000004 [ 723.091979][ C1] RBP: 0000000000000000 R08: 0000000c00000000 R09: 0000000c00000000 [ 723.091985][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000007546a [ 723.091990][ C1] R13: 00007ffcd96ba530 R14: 00007ffcd96ba520 R15: 00007ffcd96ba4ec [ 723.592443][ T1634] Kernel panic - not syncing: hung_task: blocked tasks [ 723.599323][ T1634] CPU: 0 PID: 1634 Comm: khungtaskd Not tainted 5.12.0-rc4-next-20210323-syzkaller #0 [ 723.608887][ T1634] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.619043][ T1634] Call Trace: [ 723.622337][ T1634] dump_stack+0x141/0x1d7 [ 723.626699][ T1634] panic+0x306/0x73d [ 723.630635][ T1634] ? __warn_printk+0xf3/0xf3 [ 723.635247][ T1634] ? lapic_can_unplug_cpu+0x80/0x80 [ 723.640481][ T1634] ? preempt_schedule_thunk+0x16/0x18 [ 723.645877][ T1634] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 723.652061][ T1634] ? watchdog.cold+0x22d/0x248 [ 723.656888][ T1634] watchdog.cold+0x23e/0x248 [ 723.661508][ T1634] ? trace_sched_process_hang+0x280/0x280 [ 723.667259][ T1634] kthread+0x3b1/0x4a0 [ 723.671348][ T1634] ? __kthread_bind_mask+0xc0/0xc0 [ 723.676482][ T1634] ret_from_fork+0x1f/0x30 [ 723.681590][ T1634] Kernel Offset: disabled [ 723.685916][ T1634] Rebooting in 86400 seconds..