Warning: Permanently added '10.128.0.95' (ECDSA) to the list of known hosts. syzkaller login: [ 485.867624][ T8483] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 485.882312][ T8483] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 485.908104][ T4868] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 485.928291][ T8483] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 485.940296][ T8483] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 485.949334][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program [ 721.399740][ T1642] INFO: task kworker/0:2:8 blocked for more than 143 seconds. [ 721.407477][ T1642] Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 721.418613][ T1642] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.428237][ T1642] task:kworker/0:2 state:D stack:26240 pid: 8 ppid: 2 flags:0x00004000 [ 721.438380][ T1642] Workqueue: events disconnect_work [ 721.444539][ T1642] Call Trace: [ 721.447890][ T1642] __schedule+0x917/0x2170 [ 721.453457][ T1642] ? io_schedule_timeout+0x140/0x140 [ 721.458781][ T1642] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.465102][ T1642] ? lockdep_hardirqs_on+0x79/0x100 [ 721.471096][ T1642] schedule+0xcf/0x270 [ 721.475195][ T1642] schedule_preempt_disabled+0xf/0x20 [ 721.481614][ T1642] __mutex_lock+0x81f/0x1120 [ 721.486234][ T1642] ? disconnect_work+0x18/0x200 [ 721.492274][ T1642] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.497689][ T1642] ? lock_downgrade+0x6e0/0x6e0 [ 721.503730][ T1642] disconnect_work+0x18/0x200 [ 721.508453][ T1642] process_one_work+0x98d/0x1600 [ 721.514463][ T1642] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.520536][ T1642] ? rwlock_bug.part.0+0x90/0x90 [ 721.525506][ T1642] ? _raw_spin_lock_irq+0x41/0x50 [ 721.532859][ T1642] worker_thread+0x64c/0x1120 [ 721.537576][ T1642] ? __kthread_parkme+0x13f/0x1e0 [ 721.545285][ T1642] ? process_one_work+0x1600/0x1600 [ 721.551304][ T1642] kthread+0x3b1/0x4a0 [ 721.555425][ T1642] ? __kthread_bind_mask+0xc0/0xc0 [ 721.561852][ T1642] ret_from_fork+0x1f/0x30 [ 721.566511][ T1642] INFO: task kworker/0:4:4868 blocked for more than 143 seconds. [ 721.575334][ T1642] Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 721.584040][ T1642] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.593351][ T1642] task:kworker/0:4 state:D stack:25872 pid: 4868 ppid: 2 flags:0x00004000 [ 721.603374][ T1642] Workqueue: ipv6_addrconf addrconf_dad_work [ 721.610120][ T1642] Call Trace: [ 721.613423][ T1642] __schedule+0x917/0x2170 [ 721.617874][ T1642] ? io_schedule_timeout+0x140/0x140 [ 721.625003][ T1642] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.630847][ T1642] ? lockdep_hardirqs_on+0x79/0x100 [ 721.636075][ T1642] schedule+0xcf/0x270 [ 721.641253][ T1642] schedule_preempt_disabled+0xf/0x20 [ 721.646663][ T1642] __mutex_lock+0x81f/0x1120 [ 721.652256][ T1642] ? addrconf_dad_work+0xa3/0x1340 [ 721.657406][ T1642] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.663766][ T1642] ? debug_object_deactivate+0x264/0x300 [ 721.671573][ T1642] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 721.677611][ T1642] addrconf_dad_work+0xa3/0x1340 [ 721.683947][ T1642] ? addrconf_dad_completed+0xd60/0xd60 [ 721.690349][ T1642] process_one_work+0x98d/0x1600 [ 721.695331][ T1642] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.701993][ T1642] ? rwlock_bug.part.0+0x90/0x90 [ 721.706965][ T1642] ? _raw_spin_lock_irq+0x41/0x50 [ 721.713030][ T1642] worker_thread+0x64c/0x1120 [ 721.717746][ T1642] ? __kthread_parkme+0x13f/0x1e0 [ 721.723759][ T1642] ? process_one_work+0x1600/0x1600 [ 721.728989][ T1642] kthread+0x3b1/0x4a0 [ 721.734034][ T1642] ? __kthread_bind_mask+0xc0/0xc0 [ 721.739195][ T1642] ret_from_fork+0x1f/0x30 [ 721.744654][ T1642] INFO: task kworker/1:0:8473 blocked for more than 143 seconds. [ 721.753070][ T1642] Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 721.762269][ T1642] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.771552][ T1642] task:kworker/1:0 state:D stack:29816 pid: 8473 ppid: 2 flags:0x00004000 [ 721.781388][ T1642] Workqueue: ipv6_addrconf addrconf_verify_work [ 721.787665][ T1642] Call Trace: [ 721.791957][ T1642] __schedule+0x917/0x2170 [ 721.796625][ T1642] ? io_schedule_timeout+0x140/0x140 [ 721.804397][ T1642] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.810378][ T1642] ? lockdep_hardirqs_on+0x79/0x100 [ 721.815609][ T1642] schedule+0xcf/0x270 [ 721.820895][ T1642] schedule_preempt_disabled+0xf/0x20 [ 721.826306][ T1642] __mutex_lock+0x81f/0x1120 [ 721.831985][ T1642] ? addrconf_verify_work+0xa/0x20 [ 721.837147][ T1642] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.844493][ T1642] ? lock_release+0x720/0x720 [ 721.849211][ T1642] ? lock_downgrade+0x6e0/0x6e0 [ 721.855057][ T1642] addrconf_verify_work+0xa/0x20 [ 721.860638][ T1642] process_one_work+0x98d/0x1600 [ 721.865623][ T1642] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.872000][ T1642] ? rwlock_bug.part.0+0x90/0x90 [ 721.876981][ T1642] ? _raw_spin_lock_irq+0x41/0x50 [ 721.883191][ T1642] worker_thread+0x64c/0x1120 [ 721.888003][ T1642] ? __kthread_parkme+0x13f/0x1e0 [ 721.894240][ T1642] ? process_one_work+0x1600/0x1600 [ 721.899467][ T1642] kthread+0x3b1/0x4a0 [ 721.904726][ T1642] ? __kthread_bind_mask+0xc0/0xc0 [ 721.910466][ T1642] ret_from_fork+0x1f/0x30 [ 721.914961][ T1642] INFO: task syz-executor692:8495 can't die for more than 143 seconds. [ 721.924248][ T1642] task:syz-executor692 state:R running task stack:25760 pid: 8495 ppid: 8452 flags:0x00004006 [ 721.937438][ T1642] Call Trace: [ 721.941565][ T1642] ? __schedule+0x91f/0x2170 [ 721.946202][ T1642] ? mark_held_locks+0x9f/0xe0 [ 721.952162][ T1642] ? asm_sysvec_call_function_single+0x12/0x20 [ 721.958348][ T1642] ? lockdep_hardirqs_on+0x79/0x100 [ 721.964602][ T1642] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 721.970977][ T1642] ? ieee80211_chanctx_radar_detect+0x26a/0x420 [ 721.977361][ T1642] ? check_kcov_mode+0x2e/0x40 [ 721.983186][ T1642] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 721.989461][ T1642] ? ieee80211_chanctx_radar_detect+0x26a/0x420 [ 721.996768][ T1642] ? ieee80211_check_combinations+0x3b9/0x890 [ 722.003879][ T1642] ? ieee80211_recalc_dtim+0x240/0x240 [ 722.009401][ T1642] ? ieee80211_check_concurrent_iface+0x454/0x620 [ 722.016972][ T1642] ? ieee80211_if_change_type+0x288/0x6e0 [ 722.023474][ T1642] ? ieee80211_change_iface+0x26/0x210 [ 722.028970][ T1642] ? cfg80211_change_iface+0x335/0xf40 [ 722.035599][ T1642] ? nl80211_set_interface+0x65c/0x8d0 [ 722.041692][ T1642] ? nl80211_notify_iface+0x180/0x180 [ 722.047094][ T1642] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.054365][ T1642] ? nl80211_pre_doit+0xa6/0x620 [ 722.059401][ T1642] ? genl_family_rcv_msg_doit+0x228/0x320 [ 722.067925][ T1642] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 722.076092][ T1642] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.083172][ T1642] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.089444][ T1642] ? ns_capable+0xd9/0x100 [ 722.095134][ T1642] ? genl_rcv_msg+0x328/0x580 [ 722.100723][ T1642] ? genl_get_cmd+0x480/0x480 [ 722.105428][ T1642] ? nl80211_notify_iface+0x180/0x180 [ 722.112002][ T1642] ? lock_release+0x720/0x720 [ 722.116717][ T1642] ? netlink_rcv_skb+0x153/0x420 [ 722.122737][ T1642] ? genl_get_cmd+0x480/0x480 [ 722.127456][ T1642] ? netlink_ack+0xaa0/0xaa0 [ 722.133235][ T1642] ? genl_rcv+0x24/0x40 [ 722.137418][ T1642] ? netlink_unicast+0x533/0x7d0 [ 722.143352][ T1642] ? netlink_attachskb+0x870/0x870 [ 722.148495][ T1642] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.155796][ T1642] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.162658][ T1642] ? __phys_addr_symbol+0x2c/0x70 [ 722.167769][ T1642] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.174494][ T1642] ? __check_object_size+0x171/0x3f0 [ 722.180524][ T1642] ? netlink_sendmsg+0x84c/0xd90 [ 722.185499][ T1642] ? netlink_unicast+0x7d0/0x7d0 [ 722.192925][ T1642] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.199310][ T1642] ? netlink_unicast+0x7d0/0x7d0 [ 722.205463][ T1642] ? sock_sendmsg+0xcf/0x120 [ 722.211114][ T1642] ? ____sys_sendmsg+0x6e8/0x810 [ 722.216081][ T1642] ? kernel_sendmsg+0x50/0x50 [ 722.221822][ T1642] ? do_recvmmsg+0x6d0/0x6d0 [ 722.226457][ T1642] ? lock_chain_count+0x20/0x20 [ 722.232419][ T1642] ? find_held_lock+0x2d/0x110 [ 722.237342][ T1642] ? ___sys_sendmsg+0xf3/0x170 [ 722.243285][ T1642] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.248610][ T1642] ? __lock_acquire+0x16a7/0x5230 [ 722.254780][ T1642] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.261425][ T1642] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.267448][ T1642] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.274899][ T1642] ? __fget_light+0x215/0x280 [ 722.280227][ T1642] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.286505][ T1642] ? __sys_sendmsg+0xe5/0x1b0 [ 722.292527][ T1642] ? __sys_sendmsg_sock+0x30/0x30 [ 722.297611][ T1642] ? syscall_enter_from_user_mode+0x27/0x70 [ 722.304543][ T1642] ? do_syscall_64+0x3a/0xb0 [ 722.309231][ T1642] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 722.316891][ T1642] INFO: task kworker/0:3:8497 blocked for more than 144 seconds. [ 722.327096][ T1642] Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 722.335072][ T1642] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 722.344660][ T1642] task:kworker/0:3 state:D stack:28888 pid: 8497 ppid: 2 flags:0x00004000 [ 722.354592][ T1642] Workqueue: events linkwatch_event [ 722.360492][ T1642] Call Trace: [ 722.363791][ T1642] __schedule+0x917/0x2170 [ 722.368239][ T1642] ? io_schedule_timeout+0x140/0x140 [ 722.374911][ T1642] ? _raw_spin_unlock_irq+0x1f/0x40 [ 722.380752][ T1642] ? lockdep_hardirqs_on+0x79/0x100 [ 722.385982][ T1642] schedule+0xcf/0x270 [ 722.391241][ T1642] schedule_preempt_disabled+0xf/0x20 [ 722.396661][ T1642] __mutex_lock+0x81f/0x1120 [ 722.402297][ T1642] ? linkwatch_event+0xb/0x60 [ 722.407092][ T1642] ? mutex_lock_io_nested+0xf70/0xf70 [ 722.413783][ T1642] ? lock_release+0x720/0x720 [ 722.418515][ T1642] linkwatch_event+0xb/0x60 [ 722.424056][ T1642] process_one_work+0x98d/0x1600 [ 722.429038][ T1642] ? pwq_dec_nr_in_flight+0x320/0x320 [ 722.435436][ T1642] ? rwlock_bug.part.0+0x90/0x90 [ 722.440990][ T1642] ? _raw_spin_lock_irq+0x41/0x50 [ 722.446141][ T1642] worker_thread+0x64c/0x1120 [ 722.453292][ T1642] ? __kthread_parkme+0x13f/0x1e0 [ 722.458351][ T1642] ? process_one_work+0x1600/0x1600 [ 722.464912][ T1642] kthread+0x3b1/0x4a0 [ 722.469008][ T1642] ? __kthread_bind_mask+0xc0/0xc0 [ 722.475436][ T1642] ret_from_fork+0x1f/0x30 [ 722.480594][ T1642] [ 722.480594][ T1642] Showing all locks held in the system: [ 722.488334][ T1642] 3 locks held by kworker/0:2/8: [ 722.494870][ T1642] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.506318][ T1642] #1: ffffc90000cd7da8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.517779][ T1642] #2: ffffffff8d694768 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0x18/0x200 [ 722.527755][ T1642] 1 lock held by khungtaskd/1642: [ 722.533366][ T1642] #0: ffffffff8bf76560 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 722.544056][ T1642] 3 locks held by kworker/0:4/4868: [ 722.549270][ T1642] #0: ffff888025039938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.561467][ T1642] #1: ffffc9000162fda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.574350][ T1642] #2: ffffffff8d694768 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x1340 [ 722.585685][ T1642] 1 lock held by in:imklog/8135: [ 722.591385][ T1642] #0: ffff88801342cff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 722.601420][ T1642] 3 locks held by kworker/1:0/8473: [ 722.606632][ T1642] #0: ffff888025039938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.618853][ T1642] #1: ffffc90001bbfda8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.629826][ T1642] #2: ffffffff8d694768 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 [ 722.639345][ T1642] 4 locks held by syz-executor692/8495: [ 722.645917][ T1642] 3 locks held by kworker/0:3/8497: [ 722.651764][ T1642] #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.662788][ T1642] #1: ffffc900017cfda8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.673770][ T1642] #2: ffffffff8d694768 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 [ 722.683539][ T1642] [ 722.685901][ T1642] ============================================= [ 722.685901][ T1642] [ 722.697010][ T1642] NMI backtrace for cpu 0 [ 722.701538][ T1642] CPU: 0 PID: 1642 Comm: khungtaskd Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 722.711097][ T1642] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.721156][ T1642] Call Trace: [ 722.724442][ T1642] dump_stack+0x141/0x1d7 [ 722.728835][ T1642] nmi_cpu_backtrace.cold+0x44/0xd7 [ 722.734064][ T1642] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.739341][ T1642] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 722.745412][ T1642] watchdog+0xd3b/0xf50 [ 722.749590][ T1642] ? trace_sched_process_hang+0x280/0x280 [ 722.755340][ T1642] kthread+0x3b1/0x4a0 [ 722.759531][ T1642] ? __kthread_bind_mask+0xc0/0xc0 [ 722.764657][ T1642] ret_from_fork+0x1f/0x30 [ 722.769173][ T1642] Sending NMI from CPU 0 to CPUs 1: [ 722.775462][ C1] NMI backtrace for cpu 1 [ 722.775471][ C1] CPU: 1 PID: 8495 Comm: syz-executor692 Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 722.775481][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.775490][ C1] RIP: 0010:check_kcov_mode+0x7/0x40 [ 722.775500][ C1] Code: fe ff ff 48 89 df e8 28 c5 44 00 e9 a1 fe ff ff 48 8b 3c 24 e8 1a c5 44 00 e9 18 fe ff ff cc cc cc cc cc 65 8b 05 b9 7f 8d 7e <89> c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b [ 722.775514][ C1] RSP: 0018:ffffc9000173f2c0 EFLAGS: 00000246 [ 722.775526][ C1] RAX: 0000000080000000 RBX: ffff88801e1c8c00 RCX: ffff8880163ed580 [ 722.775534][ C1] RDX: ffff8880163ed580 RSI: ffff8880163ed580 RDI: 0000000000000003 [ 722.775542][ C1] RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 [ 722.775550][ C1] R10: ffffffff887272ba R11: 0000000000000000 R12: 0000000000000000 [ 722.775559][ C1] R13: ffff888013e3a820 R14: dffffc0000000000 R15: 0000000000000000 [ 722.775567][ C1] FS: 000000000210b300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 722.775576][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 722.775583][ C1] CR2: 00007f2ec46f3000 CR3: 000000001ab1d000 CR4: 00000000001506e0 [ 722.775591][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 722.775599][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 722.775606][ C1] Call Trace: [ 722.775611][ C1] __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.775617][ C1] ieee80211_chanctx_radar_detect+0x26a/0x420 [ 722.775624][ C1] ieee80211_check_combinations+0x3b9/0x890 [ 722.775630][ C1] ? ieee80211_recalc_dtim+0x240/0x240 [ 722.775636][ C1] ieee80211_check_concurrent_iface+0x454/0x620 [ 722.775643][ C1] ieee80211_if_change_type+0x288/0x6e0 [ 722.775648][ C1] ieee80211_change_iface+0x26/0x210 [ 722.775654][ C1] cfg80211_change_iface+0x335/0xf40 [ 722.775660][ C1] nl80211_set_interface+0x65c/0x8d0 [ 722.775666][ C1] ? nl80211_notify_iface+0x180/0x180 [ 722.775671][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.775677][ C1] ? nl80211_pre_doit+0xa6/0x620 [ 722.775683][ C1] genl_family_rcv_msg_doit+0x228/0x320 [ 722.775689][ C1] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 722.775696][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.775703][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.775709][ C1] ? ns_capable+0xd9/0x100 [ 722.775714][ C1] genl_rcv_msg+0x328/0x580 [ 722.775719][ C1] ? genl_get_cmd+0x480/0x480 [ 722.775724][ C1] ? nl80211_notify_iface+0x180/0x180 [ 722.775730][ C1] ? lock_release+0x720/0x720 [ 722.775735][ C1] netlink_rcv_skb+0x153/0x420 [ 722.775740][ C1] ? genl_get_cmd+0x480/0x480 [ 722.775745][ C1] ? netlink_ack+0xaa0/0xaa0 [ 722.775750][ C1] genl_rcv+0x24/0x40 [ 722.775755][ C1] netlink_unicast+0x533/0x7d0 [ 722.775760][ C1] ? netlink_attachskb+0x870/0x870 [ 722.775766][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.775773][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.775779][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 722.775785][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.775791][ C1] ? __check_object_size+0x171/0x3f0 [ 722.775796][ C1] netlink_sendmsg+0x84c/0xd90 [ 722.775802][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.775808][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.775814][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.775819][ C1] sock_sendmsg+0xcf/0x120 [ 722.775824][ C1] ____sys_sendmsg+0x6e8/0x810 [ 722.775830][ C1] ? kernel_sendmsg+0x50/0x50 [ 722.775835][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 722.775840][ C1] ? lock_chain_count+0x20/0x20 [ 722.775845][ C1] ? find_held_lock+0x2d/0x110 [ 722.775856][ C1] ___sys_sendmsg+0xf3/0x170 [ 722.775861][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.775867][ C1] ? __lock_acquire+0x16a7/0x5230 [ 722.775873][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.775880][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.775886][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.775893][ C1] ? __fget_light+0x215/0x280 [ 722.775898][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.775904][ C1] __sys_sendmsg+0xe5/0x1b0 [ 722.775909][ C1] ? __sys_sendmsg_sock+0x30/0x30 [ 722.775915][ C1] ? syscall_enter_from_user_mode+0x27/0x70 [ 722.775921][ C1] do_syscall_64+0x3a/0xb0 [ 722.775926][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 722.775931][ C1] RIP: 0033:0x441389 [ 722.775941][ 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 [ 722.775955][ C1] RSP: 002b:00007ffd4bed6768 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 722.775968][ C1] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000441389 [ 722.775976][ C1] RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000005 [ 722.775984][ C1] RBP: 0000000000000000 R08: 0000000c00000000 R09: 0000000c00000000 [ 722.775992][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000076a73 [ 722.776001][ C1] R13: 00007ffd4bed67d0 R14: 00007ffd4bed67c0 R15: 00007ffd4bed678c [ 722.776010][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.004 msecs [ 723.287790][ T1642] Kernel panic - not syncing: hung_task: blocked tasks [ 723.294669][ T1642] CPU: 0 PID: 1642 Comm: khungtaskd Not tainted 5.12.0-rc7-next-20210415-syzkaller #0 [ 723.304225][ T1642] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.314291][ T1642] Call Trace: [ 723.317579][ T1642] dump_stack+0x141/0x1d7 [ 723.321936][ T1642] panic+0x306/0x73d [ 723.325879][ T1642] ? __warn_printk+0xf3/0xf3 [ 723.330486][ T1642] ? lapic_can_unplug_cpu+0x80/0x80 [ 723.335698][ T1642] ? preempt_schedule_thunk+0x16/0x18 [ 723.341089][ T1642] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 723.347274][ T1642] ? watchdog.cold+0x22d/0x248 [ 723.352089][ T1642] watchdog.cold+0x23e/0x248 [ 723.356694][ T1642] ? trace_sched_process_hang+0x280/0x280 [ 723.362430][ T1642] kthread+0x3b1/0x4a0 [ 723.366504][ T1642] ? __kthread_bind_mask+0xc0/0xc0 [ 723.371623][ T1642] ret_from_fork+0x1f/0x30 [ 723.376883][ T1642] Kernel Offset: disabled [ 723.381212][ T1642] Rebooting in 86400 seconds..