Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts. [ 481.235369][ T8433] IPVS: ftp: loaded support on port[0] = 21 [ 481.313981][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 481.332849][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 481.370663][ T2952] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 481.392262][ T9] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 481.412032][ T9] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program executing program [ 481.422679][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 721.381776][ T1647] INFO: task kworker/0:2:8 blocked for more than 143 seconds. [ 721.389429][ T1647] Not tainted 5.12.0-rc4-next-20210324-syzkaller #0 [ 721.400252][ T1647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.409972][ T1647] task:kworker/0:2 state:D stack:26712 pid: 8 ppid: 2 flags:0x00004000 [ 721.420372][ T1647] Workqueue: events linkwatch_event [ 721.426802][ T1647] Call Trace: [ 721.430116][ T1647] __schedule+0x911/0x2160 [ 721.435954][ T1647] ? io_schedule_timeout+0x140/0x140 [ 721.441272][ T1647] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.448262][ T1647] ? lockdep_hardirqs_on+0x79/0x100 [ 721.454672][ T1647] schedule+0xcf/0x270 [ 721.458767][ T1647] schedule_preempt_disabled+0xf/0x20 [ 721.467055][ T1647] __mutex_lock+0x81f/0x1120 [ 721.472772][ T1647] ? linkwatch_event+0xb/0x60 [ 721.477487][ T1647] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.484205][ T1647] ? lock_release+0x720/0x720 [ 721.488960][ T1647] linkwatch_event+0xb/0x60 [ 721.494734][ T1647] process_one_work+0x98d/0x1600 [ 721.499766][ T1647] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.506531][ T1647] ? rwlock_bug.part.0+0x90/0x90 [ 721.511541][ T1647] ? _raw_spin_lock_irq+0x41/0x50 [ 721.517814][ T1647] worker_thread+0x64c/0x1120 [ 721.523587][ T1647] ? __kthread_parkme+0x13f/0x1e0 [ 721.528710][ T1647] ? process_one_work+0x1600/0x1600 [ 721.535201][ T1647] kthread+0x3b1/0x4a0 [ 721.539297][ T1647] ? __kthread_bind_mask+0xc0/0xc0 [ 721.546165][ T1647] ret_from_fork+0x1f/0x30 [ 721.550759][ T1647] INFO: task kworker/0:3:2952 blocked for more than 143 seconds. [ 721.559757][ T1647] Not tainted 5.12.0-rc4-next-20210324-syzkaller #0 [ 721.568642][ T1647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.578454][ T1647] task:kworker/0:3 state:D stack:26408 pid: 2952 ppid: 2 flags:0x00004000 [ 721.588873][ T1647] Workqueue: ipv6_addrconf addrconf_dad_work [ 721.597192][ T1647] Call Trace: [ 721.600579][ T1647] __schedule+0x911/0x2160 [ 721.606316][ T1647] ? io_schedule_timeout+0x140/0x140 [ 721.612759][ T1647] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.617986][ T1647] ? lockdep_hardirqs_on+0x79/0x100 [ 721.624903][ T1647] schedule+0xcf/0x270 [ 721.628997][ T1647] schedule_preempt_disabled+0xf/0x20 [ 721.635703][ T1647] __mutex_lock+0x81f/0x1120 [ 721.640328][ T1647] ? addrconf_dad_work+0xa3/0x12b0 [ 721.646887][ T1647] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.653317][ T1647] ? debug_object_deactivate+0x264/0x300 [ 721.659046][ T1647] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 721.666393][ T1647] addrconf_dad_work+0xa3/0x12b0 [ 721.671453][ T1647] ? addrconf_dad_completed+0xc70/0xc70 [ 721.678304][ T1647] process_one_work+0x98d/0x1600 [ 721.684108][ T1647] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.689511][ T1647] ? rwlock_bug.part.0+0x90/0x90 [ 721.695675][ T1647] ? _raw_spin_lock_irq+0x41/0x50 [ 721.700735][ T1647] worker_thread+0x64c/0x1120 [ 721.707105][ T1647] ? __kthread_parkme+0x13f/0x1e0 [ 721.712962][ T1647] ? process_one_work+0x1600/0x1600 [ 721.718183][ T1647] kthread+0x3b1/0x4a0 [ 721.724846][ T1647] ? __kthread_bind_mask+0xc0/0xc0 [ 721.730165][ T1647] ret_from_fork+0x1f/0x30 [ 721.735841][ T1647] INFO: task kworker/1:2:2955 blocked for more than 143 seconds. [ 721.744612][ T1647] Not tainted 5.12.0-rc4-next-20210324-syzkaller #0 [ 721.752578][ T1647] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 721.761249][ T1647] task:kworker/1:2 state:D stack:27696 pid: 2955 ppid: 2 flags:0x00004000 [ 721.771873][ T1647] Workqueue: events disconnect_work [ 721.777173][ T1647] Call Trace: [ 721.780456][ T1647] __schedule+0x911/0x2160 [ 721.787270][ T1647] ? io_schedule_timeout+0x140/0x140 [ 721.793385][ T1647] ? _raw_spin_unlock_irq+0x1f/0x40 [ 721.798606][ T1647] ? lockdep_hardirqs_on+0x79/0x100 [ 721.805099][ T1647] schedule+0xcf/0x270 [ 721.809191][ T1647] schedule_preempt_disabled+0xf/0x20 [ 721.815778][ T1647] __mutex_lock+0x81f/0x1120 [ 721.820389][ T1647] ? disconnect_work+0x18/0x200 [ 721.826535][ T1647] ? mutex_lock_io_nested+0xf70/0xf70 [ 721.833243][ T1647] ? lock_downgrade+0x6e0/0x6e0 [ 721.838130][ T1647] disconnect_work+0x18/0x200 [ 721.844239][ T1647] process_one_work+0x98d/0x1600 [ 721.849214][ T1647] ? pwq_dec_nr_in_flight+0x320/0x320 [ 721.857188][ T1647] ? rwlock_bug.part.0+0x90/0x90 [ 721.862955][ T1647] ? _raw_spin_lock_irq+0x41/0x50 [ 721.868008][ T1647] worker_thread+0x64c/0x1120 [ 721.873895][ T1647] ? __kthread_parkme+0x13f/0x1e0 [ 721.878943][ T1647] ? process_one_work+0x1600/0x1600 [ 721.885369][ T1647] kthread+0x3b1/0x4a0 [ 721.889535][ T1647] ? __kthread_bind_mask+0xc0/0xc0 [ 721.895858][ T1647] ret_from_fork+0x1f/0x30 [ 721.900405][ T1647] INFO: task syz-executor182:8475 can't die for more than 143 seconds. [ 721.909908][ T1647] task:syz-executor182 state:R running task stack:27336 pid: 8475 ppid: 8433 flags:0x00004006 [ 721.921639][ T1647] Call Trace: [ 721.924932][ T1647] ? __schedule+0x919/0x2160 [ 721.929557][ T1647] ? mark_held_locks+0x9f/0xe0 [ 721.936040][ T1647] ? mark_held_locks+0x9f/0xe0 [ 721.940843][ T1647] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 721.947635][ T1647] ? lockdep_hardirqs_on+0x79/0x100 [ 721.953916][ T1647] ? asm_sysvec_reschedule_ipi+0x12/0x20 [ 721.959581][ T1647] ? ieee80211_chanctx_radar_detect+0x26a/0x420 [ 721.967263][ T1647] ? __sanitizer_cov_trace_const_cmp1+0x18/0x80 [ 721.974405][ T1647] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 721.980677][ T1647] ? ieee80211_chanctx_radar_detect+0x23d/0x420 [ 721.989448][ T1647] ? ieee80211_check_combinations+0x3b9/0x890 [ 721.996479][ T1647] ? ieee80211_recalc_dtim+0x240/0x240 [ 722.002979][ T1647] ? ieee80211_check_concurrent_iface+0x454/0x620 [ 722.009510][ T1647] ? ieee80211_if_change_type+0x288/0x6e0 [ 722.016334][ T1647] ? ieee80211_change_iface+0x26/0x210 [ 722.022477][ T1647] ? cfg80211_change_iface+0x335/0xf30 [ 722.028022][ T1647] ? nl80211_set_interface+0x65c/0x8d0 [ 722.034765][ T1647] ? nl80211_notify_iface+0x180/0x180 [ 722.040168][ T1647] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.047546][ T1647] ? nl80211_pre_doit+0xa6/0x5c0 [ 722.053219][ T1647] ? genl_family_rcv_msg_doit+0x228/0x320 [ 722.059027][ T1647] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 722.067505][ T1647] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.074436][ T1647] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.080702][ T1647] ? ns_capable+0xde/0x100 [ 722.086245][ T1647] ? genl_rcv_msg+0x328/0x580 [ 722.090953][ T1647] ? genl_get_cmd+0x480/0x480 [ 722.097003][ T1647] ? nl80211_notify_iface+0x180/0x180 [ 722.103397][ T1647] ? lock_release+0x720/0x720 [ 722.108110][ T1647] ? netlink_rcv_skb+0x153/0x420 [ 722.115588][ T1647] ? genl_get_cmd+0x480/0x480 [ 722.120296][ T1647] ? netlink_ack+0xaa0/0xaa0 [ 722.125985][ T1647] ? genl_rcv+0x24/0x40 [ 722.130163][ T1647] ? netlink_unicast+0x533/0x7d0 [ 722.136688][ T1647] ? netlink_attachskb+0x870/0x870 [ 722.142547][ T1647] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.148822][ T1647] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.156204][ T1647] ? __phys_addr_symbol+0x2c/0x70 [ 722.163335][ T1647] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.169083][ T1647] ? __check_object_size+0x171/0x3f0 [ 722.175630][ T1647] ? netlink_sendmsg+0x856/0xd90 [ 722.180597][ T1647] ? netlink_unicast+0x7d0/0x7d0 [ 722.186799][ T1647] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.193766][ T1647] ? netlink_unicast+0x7d0/0x7d0 [ 722.198725][ T1647] ? sock_sendmsg+0xcf/0x120 [ 722.204645][ T1647] ? ____sys_sendmsg+0x6e8/0x810 [ 722.209690][ T1647] ? kernel_sendmsg+0x50/0x50 [ 722.215437][ T1647] ? do_recvmmsg+0x6d0/0x6d0 [ 722.220058][ T1647] ? lock_chain_count+0x20/0x20 [ 722.226638][ T1647] ? find_held_lock+0x2d/0x110 [ 722.231521][ T1647] ? ___sys_sendmsg+0xf3/0x170 [ 722.237531][ T1647] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.245023][ T1647] ? __lock_acquire+0x16a7/0x5230 [ 722.250097][ T1647] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.257179][ T1647] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.264071][ T1647] ? __fget_light+0x215/0x280 [ 722.268799][ T1647] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.276147][ T1647] ? __sys_sendmsg+0xe5/0x1b0 [ 722.280914][ T1647] ? __sys_sendmsg_sock+0x30/0x30 [ 722.287229][ T1647] ? __context_tracking_enter+0xef/0x100 [ 722.293627][ T1647] ? syscall_enter_from_user_mode+0x27/0x70 [ 722.299554][ T1647] ? do_syscall_64+0x2d/0x70 [ 722.305224][ T1647] ? entry_SYSCALL_64_after_hwframe+0x44/0xae [ 722.311370][ T1647] [ 722.311370][ T1647] Showing all locks held in the system: [ 722.321192][ T1647] 3 locks held by kworker/0:2/8: [ 722.327998][ T1647] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.339148][ T1647] #1: ffffc90000cd7da8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.350457][ T1647] #2: ffffffff8d688568 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 [ 722.360431][ T1647] 1 lock held by khungtaskd/1647: [ 722.366375][ T1647] #0: ffffffff8bf75360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 722.379339][ T1647] 3 locks held by kworker/0:3/2952: [ 722.385199][ T1647] #0: ffff888144ac2538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.396885][ T1647] #1: ffffc900015dfda8 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.409863][ T1647] #2: ffffffff8d688568 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xa3/0x12b0 [ 722.420160][ T1647] 3 locks held by kworker/1:2/2955: [ 722.426130][ T1647] #0: ffff888010864d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 [ 722.437281][ T1647] #1: ffffc900016dfda8 (cfg80211_disconnect_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 [ 722.449028][ T1647] #2: ffffffff8d688568 (rtnl_mutex){+.+.}-{3:3}, at: disconnect_work+0x18/0x200 [ 722.459034][ T1647] 1 lock held by in:imklog/8136: [ 722.464662][ T1647] #0: ffff888023387270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 722.474962][ T1647] 4 locks held by syz-executor182/8475: [ 722.480541][ T1647] [ 722.484149][ T1647] ============================================= [ 722.484149][ T1647] [ 722.493380][ T1647] NMI backtrace for cpu 0 [ 722.497712][ T1647] CPU: 0 PID: 1647 Comm: khungtaskd Not tainted 5.12.0-rc4-next-20210324-syzkaller #0 [ 722.507257][ T1647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.517315][ T1647] Call Trace: [ 722.523044][ T1647] dump_stack+0x141/0x1d7 [ 722.527427][ T1647] nmi_cpu_backtrace.cold+0x44/0xd7 [ 722.532639][ T1647] ? lapic_can_unplug_cpu+0x80/0x80 [ 722.537893][ T1647] nmi_trigger_cpumask_backtrace+0x1b3/0x230 [ 722.543956][ T1647] watchdog+0xd8e/0xf40 [ 722.548125][ T1647] ? trace_sched_process_hang+0x280/0x280 [ 722.553862][ T1647] kthread+0x3b1/0x4a0 [ 722.557942][ T1647] ? __kthread_bind_mask+0xc0/0xc0 [ 722.563066][ T1647] ret_from_fork+0x1f/0x30 [ 722.567786][ T1647] Sending NMI from CPU 0 to CPUs 1: [ 722.574197][ C1] NMI backtrace for cpu 1 [ 722.574206][ C1] CPU: 1 PID: 8475 Comm: syz-executor182 Not tainted 5.12.0-rc4-next-20210324-syzkaller #0 [ 722.574217][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 722.574226][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 [ 722.574237][ C1] Code: f0 4d 89 03 e9 f2 fc ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 40 00 <65> 8b 05 89 c6 8d 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b [ 722.574253][ C1] RSP: 0018:ffffc9000163f2d8 EFLAGS: 00000246 [ 722.574266][ C1] RAX: 0000000000000000 RBX: ffff888026524c00 RCX: ffff888023229c80 [ 722.574274][ C1] RDX: 0000000000000000 RSI: ffff888023229c80 RDI: 0000000000000003 [ 722.574283][ C1] RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 [ 722.574292][ C1] R10: ffffffff886b916a R11: 0000000000000000 R12: 0000000000000000 [ 722.574301][ C1] R13: ffff888018b49020 R14: dffffc0000000000 R15: 0000000000000000 [ 722.574310][ C1] FS: 0000000000e75300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 722.574319][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 722.574326][ C1] CR2: 000056150151d268 CR3: 0000000018acd000 CR4: 00000000001506e0 [ 722.574335][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 722.574343][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 722.574350][ C1] Call Trace: [ 722.574355][ C1] ieee80211_chanctx_radar_detect+0x2c9/0x420 [ 722.574362][ C1] ieee80211_check_combinations+0x3b9/0x890 [ 722.574368][ C1] ? ieee80211_recalc_dtim+0x240/0x240 [ 722.574375][ C1] ieee80211_check_concurrent_iface+0x454/0x620 [ 722.574382][ C1] ieee80211_if_change_type+0x288/0x6e0 [ 722.574388][ C1] ieee80211_change_iface+0x26/0x210 [ 722.574394][ C1] cfg80211_change_iface+0x335/0xf30 [ 722.574400][ C1] nl80211_set_interface+0x65c/0x8d0 [ 722.574406][ C1] ? nl80211_notify_iface+0x180/0x180 [ 722.574412][ C1] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 722.574419][ C1] ? nl80211_pre_doit+0xa6/0x5c0 [ 722.574424][ C1] genl_family_rcv_msg_doit+0x228/0x320 [ 722.574431][ C1] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x290/0x290 [ 722.574439][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.574446][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.574452][ C1] ? ns_capable+0xde/0x100 [ 722.574457][ C1] genl_rcv_msg+0x328/0x580 [ 722.574463][ C1] ? genl_get_cmd+0x480/0x480 [ 722.574468][ C1] ? nl80211_notify_iface+0x180/0x180 [ 722.574474][ C1] ? lock_release+0x720/0x720 [ 722.574479][ C1] netlink_rcv_skb+0x153/0x420 [ 722.574485][ C1] ? genl_get_cmd+0x480/0x480 [ 722.574490][ C1] ? netlink_ack+0xaa0/0xaa0 [ 722.574495][ C1] genl_rcv+0x24/0x40 [ 722.574500][ C1] netlink_unicast+0x533/0x7d0 [ 722.574505][ C1] ? netlink_attachskb+0x870/0x870 [ 722.574512][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.574518][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.574525][ C1] ? __phys_addr_symbol+0x2c/0x70 [ 722.574531][ C1] ? __sanitizer_cov_trace_cmp8+0x1d/0x70 [ 722.574537][ C1] ? __check_object_size+0x171/0x3f0 [ 722.574543][ C1] netlink_sendmsg+0x856/0xd90 [ 722.574549][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.574555][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.574561][ C1] ? netlink_unicast+0x7d0/0x7d0 [ 722.574567][ C1] sock_sendmsg+0xcf/0x120 [ 722.574572][ C1] ____sys_sendmsg+0x6e8/0x810 [ 722.574577][ C1] ? kernel_sendmsg+0x50/0x50 [ 722.574583][ C1] ? do_recvmmsg+0x6d0/0x6d0 [ 722.574588][ C1] ? lock_chain_count+0x20/0x20 [ 722.574594][ C1] ? find_held_lock+0x2d/0x110 [ 722.574599][ C1] ___sys_sendmsg+0xf3/0x170 [ 722.574605][ C1] ? sendmsg_copy_msghdr+0x160/0x160 [ 722.574611][ C1] ? __lock_acquire+0x16a7/0x5230 [ 722.574617][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 722.574623][ C1] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 722.574630][ C1] ? __fget_light+0x215/0x280 [ 722.574636][ C1] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 722.574642][ C1] __sys_sendmsg+0xe5/0x1b0 [ 722.574648][ C1] ? __sys_sendmsg_sock+0x30/0x30 [ 722.574653][ C1] ? __context_tracking_enter+0xef/0x100 [ 722.574660][ C1] ? syscall_enter_from_user_mode+0x27/0x70 [ 722.574666][ C1] do_syscall_64+0x2d/0x70 [ 722.574672][ C1] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 722.574678][ C1] RIP: 0033:0x441169 [ 722.574687][ 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 [ 722.574703][ C1] RSP: 002b:00007ffd8a8dc2c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 722.574717][ C1] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000441169 [ 722.574725][ C1] RDX: 0000000000000000 RSI: 0000000020000340 RDI: 0000000000000003 [ 722.574734][ C1] RBP: 0000000000000000 R08: 0000000c00000000 R09: 0000000c00000000 [ 722.574742][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000758c1 [ 722.574751][ C1] R13: 00007ffd8a8dc330 R14: 00007ffd8a8dc320 R15: 00007ffd8a8dc2ec [ 722.574760][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.083 msecs [ 723.091534][ T1647] Kernel panic - not syncing: hung_task: blocked tasks [ 723.098407][ T1647] CPU: 0 PID: 1647 Comm: khungtaskd Not tainted 5.12.0-rc4-next-20210324-syzkaller #0 [ 723.107953][ T1647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 723.118005][ T1647] Call Trace: [ 723.121298][ T1647] dump_stack+0x141/0x1d7 [ 723.125658][ T1647] panic+0x306/0x73d [ 723.129568][ T1647] ? __warn_printk+0xf3/0xf3 [ 723.134173][ T1647] ? lapic_can_unplug_cpu+0x80/0x80 [ 723.139382][ T1647] ? preempt_schedule_thunk+0x16/0x18 [ 723.144767][ T1647] ? nmi_trigger_cpumask_backtrace+0x196/0x230 [ 723.150942][ T1647] ? watchdog.cold+0x22d/0x248 [ 723.155769][ T1647] watchdog.cold+0x23e/0x248 [ 723.160399][ T1647] ? trace_sched_process_hang+0x280/0x280 [ 723.166156][ T1647] kthread+0x3b1/0x4a0 [ 723.170251][ T1647] ? __kthread_bind_mask+0xc0/0xc0 [ 723.175384][ T1647] ret_from_fork+0x1f/0x30 [ 723.180859][ T1647] Kernel Offset: disabled [ 723.185242][ T1647] Rebooting in 86400 seconds..