[ 37.535312] audit: type=1800 audit(1550329872.021:27): pid=7608 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.556081] audit: type=1800 audit(1550329872.021:28): pid=7608 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.327834] audit: type=1800 audit(1550329872.871:29): pid=7608 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 38.353310] audit: type=1800 audit(1550329872.871:30): pid=7608 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.122' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 853.024514] INFO: task syz-executor772:7895 blocked for more than 140 seconds. [ 853.032125] Not tainted 5.0.0-rc6+ #66 [ 853.037615] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 853.045862] syz-executor772 D28816 7895 7767 0x00000004 [ 853.051631] Call Trace: [ 853.054377] __schedule+0x817/0x1cc0 [ 853.058345] ? __mutex_lock+0x721/0x1310 [ 853.062427] ? pci_mmcfg_check_reserved+0x170/0x170 [ 853.067662] schedule+0x92/0x180 [ 853.071050] schedule_preempt_disabled+0x13/0x20 [ 853.076009] __mutex_lock+0x726/0x1310 [ 853.080035] ? rtnetlink_rcv_msg+0x40a/0xb00 [ 853.084776] ? refcount_dec_and_test_checked+0x1b/0x20 [ 853.090082] ? mutex_trylock+0x1e0/0x1e0 [ 853.094161] ? rtnetlink_rcv_msg+0x3d0/0xb00 [ 853.098870] ? lock_downgrade+0x810/0x810 [ 853.103046] mutex_lock_nested+0x16/0x20 [ 853.107308] ? mutex_lock_nested+0x16/0x20 [ 853.111560] rtnetlink_rcv_msg+0x40a/0xb00 [ 853.115988] ? rtnetlink_put_metrics+0x560/0x560 [ 853.120869] ? netlink_deliver_tap+0x22d/0xbf0 [ 853.125656] ? find_held_lock+0x35/0x130 [ 853.129738] netlink_rcv_skb+0x17a/0x460 [ 853.133805] ? rtnetlink_put_metrics+0x560/0x560 [ 853.138790] ? netlink_ack+0xb50/0xb50 [ 853.142781] ? kasan_check_read+0x11/0x20 [ 853.147141] ? netlink_deliver_tap+0x254/0xbf0 [ 853.151758] rtnetlink_rcv+0x1d/0x30 [ 853.155668] netlink_unicast+0x536/0x720 [ 853.159751] ? netlink_attachskb+0x770/0x770 [ 853.164247] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 853.170359] ? __check_object_size+0x3d/0x42f [ 853.175061] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 853.180097] netlink_sendmsg+0x8ae/0xd70 [ 853.184183] ? netlink_unicast+0x720/0x720 [ 853.188691] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 853.193557] ? apparmor_socket_sendmsg+0x2a/0x30 [ 853.198465] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 853.204087] ? security_socket_sendmsg+0x93/0xc0 [ 853.209036] ? netlink_unicast+0x720/0x720 [ 853.213349] sock_sendmsg+0xdd/0x130 [ 853.217239] ___sys_sendmsg+0x806/0x930 [ 853.221228] ? copy_msghdr_from_user+0x430/0x430 [ 853.226222] ? __local_bh_enable_ip+0x15a/0x270 [ 853.230910] ? lockdep_hardirqs_on+0x415/0x5d0 [ 853.235675] ? release_sock+0x158/0x1c0 [ 853.239713] ? trace_hardirqs_on+0x67/0x230 [ 853.244047] ? release_sock+0x158/0x1c0 [ 853.248218] ? __local_bh_enable_ip+0x15a/0x270 [ 853.252979] ? _raw_spin_unlock_bh+0x31/0x40 [ 853.257552] ? release_sock+0x158/0x1c0 [ 853.261539] ? sock_setsockopt+0x197/0x1f70 [ 853.266054] ? sock_enable_timestamp+0xe0/0xe0 [ 853.270734] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 853.275887] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 853.281473] ? __fget_light+0x1a9/0x230 [ 853.285751] ? __fdget+0x1b/0x20 [ 853.289134] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 853.295647] __sys_sendmsg+0x105/0x1d0 [ 853.299553] ? __ia32_sys_shutdown+0x80/0x80 [ 853.304057] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 853.309054] ? do_syscall_64+0x26/0x610 [ 853.313047] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 853.318604] ? do_syscall_64+0x26/0x610 [ 853.322601] __x64_sys_sendmsg+0x78/0xb0 [ 853.326876] do_syscall_64+0x103/0x610 [ 853.330786] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 853.336180] RIP: 0033:0x4459f9 [ 853.339383] Code: ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 <7a> fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd [ 853.358520] RSP: 002b:00007ffc71f3f3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 853.366393] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459f9 [ 853.373675] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 853.381157] RBP: 00000000000a85a1 R08: 00000000004002c8 R09: 00000000004002c8 [ 853.388567] R10: 00000000200015a6 R11: 0000000000000246 R12: 0000000000406890 [ 853.396006] R13: 0000000000406920 R14: 0000000000000000 R15: 0000000000000000 [ 853.403311] INFO: task syz-executor772:7896 blocked for more than 140 seconds. [ 853.410879] Not tainted 5.0.0-rc6+ #66 [ 853.415450] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 853.423422] syz-executor772 D28816 7896 7765 0x00000004 [ 853.430285] Call Trace: [ 853.432892] __schedule+0x817/0x1cc0 [ 853.436819] ? __mutex_lock+0x721/0x1310 [ 853.440905] ? pci_mmcfg_check_reserved+0x170/0x170 [ 853.446096] schedule+0x92/0x180 [ 853.449484] schedule_preempt_disabled+0x13/0x20 [ 853.454275] __mutex_lock+0x726/0x1310 [ 853.458382] ? rtnetlink_rcv_msg+0x40a/0xb00 [ 853.462810] ? refcount_dec_and_test_checked+0x1b/0x20 [ 853.468264] ? mutex_trylock+0x1e0/0x1e0 [ 853.472342] ? rtnetlink_rcv_msg+0x3d0/0xb00 [ 853.476970] ? lock_downgrade+0x810/0x810 [ 853.481137] mutex_lock_nested+0x16/0x20 [ 853.485347] ? mutex_lock_nested+0x16/0x20 [ 853.489593] rtnetlink_rcv_msg+0x40a/0xb00 [ 853.493854] ? rtnetlink_put_metrics+0x560/0x560 [ 853.498826] ? netlink_deliver_tap+0x22d/0xbf0 [ 853.503425] ? find_held_lock+0x35/0x130 [ 853.507695] netlink_rcv_skb+0x17a/0x460 [ 853.511780] ? rtnetlink_put_metrics+0x560/0x560 [ 853.516710] ? netlink_ack+0xb50/0xb50 [ 853.520620] ? kasan_check_read+0x11/0x20 [ 853.524945] ? netlink_deliver_tap+0x254/0xbf0 [ 853.529561] rtnetlink_rcv+0x1d/0x30 [ 853.533284] netlink_unicast+0x536/0x720 [ 853.537553] ? netlink_attachskb+0x770/0x770 [ 853.541980] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 853.547194] ? __check_object_size+0x3d/0x42f [ 853.551699] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 853.557718] netlink_sendmsg+0x8ae/0xd70 [ 853.561806] ? netlink_unicast+0x720/0x720 [ 853.566202] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 853.571061] ? apparmor_socket_sendmsg+0x2a/0x30 [ 853.576002] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 853.581562] ? security_socket_sendmsg+0x93/0xc0 [ 853.586491] ? netlink_unicast+0x720/0x720 [ 853.590746] sock_sendmsg+0xdd/0x130 [ 853.594625] ___sys_sendmsg+0x806/0x930 [ 853.598621] ? copy_msghdr_from_user+0x430/0x430 [ 853.603395] ? __local_bh_enable_ip+0x15a/0x270 [ 853.608272] ? lockdep_hardirqs_on+0x415/0x5d0 [ 853.612869] ? release_sock+0x158/0x1c0 [ 853.617105] ? trace_hardirqs_on+0x67/0x230 [ 853.621445] ? release_sock+0x158/0x1c0 [ 853.625593] ? __local_bh_enable_ip+0x15a/0x270 [ 853.630276] ? _raw_spin_unlock_bh+0x31/0x40 [ 853.634870] ? release_sock+0x158/0x1c0 [ 853.638860] ? sock_setsockopt+0x197/0x1f70 [ 853.643191] ? sock_enable_timestamp+0xe0/0xe0 [ 853.647978] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 853.652922] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 853.658650] ? __fget_light+0x1a9/0x230 [ 853.662642] ? __fdget+0x1b/0x20 [ 853.666162] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 853.671716] __sys_sendmsg+0x105/0x1d0 [ 853.675802] ? __ia32_sys_shutdown+0x80/0x80 [ 853.680234] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 853.685948] ? do_syscall_64+0x26/0x610 [ 853.689973] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 853.695499] ? do_syscall_64+0x26/0x610 [ 853.699490] __x64_sys_sendmsg+0x78/0xb0 [ 853.703558] do_syscall_64+0x103/0x610 [ 853.707657] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 853.712873] RIP: 0033:0x4459f9 [ 853.716298] Code: ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 <7a> fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd [ 853.735346] RSP: 002b:00007ffc71f3f3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 853.743064] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459f9 [ 853.750495] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 853.757934] RBP: 00000000000a85a5 R08: 00000000004002c8 R09: 00000000004002c8 [ 853.765367] R10: 00000000200015a6 R11: 0000000000000246 R12: 0000000000406890 [ 853.772659] R13: 0000000000406920 R14: 0000000000000000 R15: 0000000000000000 [ 853.780179] INFO: task syz-executor772:7897 blocked for more than 140 seconds. [ 853.787683] Not tainted 5.0.0-rc6+ #66 [ 853.792091] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 853.800235] syz-executor772 D27984 7897 7769 0x00000004 [ 853.806075] Call Trace: [ 853.808684] __schedule+0x817/0x1cc0 [ 853.812401] ? __mutex_lock+0x721/0x1310 [ 853.817443] ? pci_mmcfg_check_reserved+0x170/0x170 [ 853.822485] schedule+0x92/0x180 [ 853.826046] schedule_preempt_disabled+0x13/0x20 [ 853.830812] __mutex_lock+0x726/0x1310 [ 853.834898] ? rtnetlink_rcv_msg+0x40a/0xb00 [ 853.839356] ? mutex_trylock+0x1e0/0x1e0 [ 853.843801] ? rtnetlink_rcv_msg+0x3d0/0xb00 [ 853.848423] ? lock_downgrade+0x810/0x810 [ 853.852592] mutex_lock_nested+0x16/0x20 [ 853.856840] ? mutex_lock_nested+0x16/0x20 [ 853.861089] rtnetlink_rcv_msg+0x40a/0xb00 [ 853.865478] ? rtnetlink_put_metrics+0x560/0x560 [ 853.870250] ? netlink_deliver_tap+0x22d/0xbf0 [ 853.875012] ? find_held_lock+0x35/0x130 [ 853.879092] netlink_rcv_skb+0x17a/0x460 [ 853.883166] ? rtnetlink_put_metrics+0x560/0x560 [ 853.888119] ? netlink_ack+0xb50/0xb50 [ 853.892019] ? kasan_check_read+0x11/0x20 [ 853.896340] ? netlink_deliver_tap+0x254/0xbf0 [ 853.900941] rtnetlink_rcv+0x1d/0x30 [ 853.904832] netlink_unicast+0x536/0x720 [ 853.908910] ? netlink_attachskb+0x770/0x770 [ 853.913324] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 853.918545] ? __check_object_size+0x3d/0x42f [ 853.923049] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 853.928256] netlink_sendmsg+0x8ae/0xd70 [ 853.932337] ? netlink_unicast+0x720/0x720 [ 853.936786] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 853.941645] ? apparmor_socket_sendmsg+0x2a/0x30 [ 853.947366] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 853.952930] ? security_socket_sendmsg+0x93/0xc0 [ 853.957927] ? netlink_unicast+0x720/0x720 [ 853.962199] sock_sendmsg+0xdd/0x130 [ 853.966123] ___sys_sendmsg+0x806/0x930 [ 853.970124] ? copy_msghdr_from_user+0x430/0x430 [ 853.975114] ? __local_bh_enable_ip+0x15a/0x270 [ 853.979804] ? lockdep_hardirqs_on+0x415/0x5d0 [ 853.984663] ? release_sock+0x158/0x1c0 [ 853.988655] ? trace_hardirqs_on+0x67/0x230 [ 853.992996] ? release_sock+0x158/0x1c0 [ 853.997200] ? __local_bh_enable_ip+0x15a/0x270 [ 854.001891] ? _raw_spin_unlock_bh+0x31/0x40 [ 854.006496] ? release_sock+0x158/0x1c0 [ 854.010483] ? sock_setsockopt+0x197/0x1f70 [ 854.015037] ? sock_enable_timestamp+0xe0/0xe0 [ 854.019639] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 854.024771] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.030324] ? __fget_light+0x1a9/0x230 [ 854.034506] ? __fdget+0x1b/0x20 [ 854.037884] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 854.043438] __sys_sendmsg+0x105/0x1d0 [ 854.047539] ? __ia32_sys_shutdown+0x80/0x80 [ 854.051983] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 854.056922] ? do_syscall_64+0x26/0x610 [ 854.060923] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.066497] ? do_syscall_64+0x26/0x610 [ 854.070493] __x64_sys_sendmsg+0x78/0xb0 [ 854.075549] do_syscall_64+0x103/0x610 [ 854.079467] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.084874] RIP: 0033:0x4459f9 [ 854.088080] Code: ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 <7a> fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd [ 854.107217] RSP: 002b:00007ffc71f3f3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 854.115111] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459f9 [ 854.122401] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 854.129912] RBP: 00000000000a85a9 R08: 00000000004002c8 R09: 00000000004002c8 [ 854.137380] R10: 00000000200015a6 R11: 0000000000000246 R12: 0000000000406890 [ 854.144851] R13: 0000000000406920 R14: 0000000000000000 R15: 0000000000000000 [ 854.152158] INFO: task syz-executor772:7898 blocked for more than 140 seconds. [ 854.159776] Not tainted 5.0.0-rc6+ #66 [ 854.164186] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 854.172376] syz-executor772 D28816 7898 7764 0x00000004 [ 854.178158] Call Trace: [ 854.180814] __schedule+0x817/0x1cc0 [ 854.184691] ? __mutex_lock+0x721/0x1310 [ 854.188802] ? pci_mmcfg_check_reserved+0x170/0x170 [ 854.193832] schedule+0x92/0x180 [ 854.197414] schedule_preempt_disabled+0x13/0x20 [ 854.202180] __mutex_lock+0x726/0x1310 [ 854.207039] ? rtnetlink_rcv_msg+0x40a/0xb00 [ 854.211465] ? mutex_trylock+0x1e0/0x1e0 [ 854.215707] ? rtnetlink_rcv_msg+0x3d0/0xb00 [ 854.220142] ? lock_downgrade+0x810/0x810 [ 854.224457] mutex_lock_nested+0x16/0x20 [ 854.228534] ? mutex_lock_nested+0x16/0x20 [ 854.232773] rtnetlink_rcv_msg+0x40a/0xb00 [ 854.237192] ? rtnetlink_put_metrics+0x560/0x560 [ 854.241976] ? netlink_deliver_tap+0x22d/0xbf0 [ 854.246756] ? find_held_lock+0x35/0x130 [ 854.250911] netlink_rcv_skb+0x17a/0x460 [ 854.255313] ? rtnetlink_put_metrics+0x560/0x560 [ 854.260084] ? netlink_ack+0xb50/0xb50 [ 854.264009] ? kasan_check_read+0x11/0x20 [ 854.268417] ? netlink_deliver_tap+0x254/0xbf0 [ 854.273043] rtnetlink_rcv+0x1d/0x30 [ 854.276894] netlink_unicast+0x536/0x720 [ 854.280980] ? netlink_attachskb+0x770/0x770 [ 854.285547] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 854.290577] ? __check_object_size+0x3d/0x42f [ 854.295247] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 854.300284] netlink_sendmsg+0x8ae/0xd70 [ 854.304507] ? netlink_unicast+0x720/0x720 [ 854.308764] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 854.313614] ? apparmor_socket_sendmsg+0x2a/0x30 [ 854.318535] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.324086] ? security_socket_sendmsg+0x93/0xc0 [ 854.329028] ? netlink_unicast+0x720/0x720 [ 854.333279] sock_sendmsg+0xdd/0x130 [ 854.337926] ___sys_sendmsg+0x806/0x930 [ 854.341929] ? copy_msghdr_from_user+0x430/0x430 [ 854.346906] ? __local_bh_enable_ip+0x15a/0x270 [ 854.351592] ? lockdep_hardirqs_on+0x415/0x5d0 [ 854.356331] ? release_sock+0x158/0x1c0 [ 854.360322] ? trace_hardirqs_on+0x67/0x230 [ 854.364814] ? release_sock+0x158/0x1c0 [ 854.368805] ? __local_bh_enable_ip+0x15a/0x270 [ 854.373485] ? _raw_spin_unlock_bh+0x31/0x40 [ 854.378061] ? release_sock+0x158/0x1c0 [ 854.382050] ? sock_setsockopt+0x197/0x1f70 [ 854.386580] ? sock_enable_timestamp+0xe0/0xe0 [ 854.391181] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 854.396270] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.401822] ? __fget_light+0x1a9/0x230 [ 854.405984] ? __fdget+0x1b/0x20 [ 854.409362] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 854.415062] __sys_sendmsg+0x105/0x1d0 [ 854.418979] ? __ia32_sys_shutdown+0x80/0x80 [ 854.423409] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 854.428340] ? do_syscall_64+0x26/0x610 [ 854.432331] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.437848] ? do_syscall_64+0x26/0x610 [ 854.441840] __x64_sys_sendmsg+0x78/0xb0 [ 854.446069] do_syscall_64+0x103/0x610 [ 854.449984] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.455330] RIP: 0033:0x4459f9 [ 854.458536] Code: ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 <7a> fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd [ 854.478380] RSP: 002b:00007ffc71f3f3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 854.486229] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459f9 [ 854.493507] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 854.500927] RBP: 00000000000a85af R08: 00000000004002c8 R09: 00000000004002c8 [ 854.508360] R10: 00000000200015a6 R11: 0000000000000246 R12: 0000000000406890 [ 854.515788] R13: 0000000000406920 R14: 0000000000000000 R15: 0000000000000000 [ 854.523092] INFO: task syz-executor772:7899 blocked for more than 140 seconds. [ 854.530598] Not tainted 5.0.0-rc6+ #66 [ 854.535149] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 854.543137] syz-executor772 D28816 7899 7768 0x00000004 [ 854.548932] Call Trace: [ 854.551551] __schedule+0x817/0x1cc0 [ 854.555427] ? __mutex_lock+0x721/0x1310 [ 854.559513] ? pci_mmcfg_check_reserved+0x170/0x170 [ 854.564681] schedule+0x92/0x180 [ 854.568064] schedule_preempt_disabled+0x13/0x20 [ 854.572823] __mutex_lock+0x726/0x1310 [ 854.576880] ? rtnetlink_rcv_msg+0x40a/0xb00 [ 854.581400] ? refcount_dec_and_test_checked+0x1b/0x20 [ 854.586844] ? mutex_trylock+0x1e0/0x1e0 [ 854.590927] ? rtnetlink_rcv_msg+0x3d0/0xb00 [ 854.595507] ? lock_downgrade+0x810/0x810 [ 854.599676] mutex_lock_nested+0x16/0x20 [ 854.603749] ? mutex_lock_nested+0x16/0x20 [ 854.608931] rtnetlink_rcv_msg+0x40a/0xb00 [ 854.613197] ? rtnetlink_put_metrics+0x560/0x560 [ 854.618123] ? netlink_deliver_tap+0x22d/0xbf0 [ 854.622751] ? find_held_lock+0x35/0x130 [ 854.626974] netlink_rcv_skb+0x17a/0x460 [ 854.631051] ? rtnetlink_put_metrics+0x560/0x560 [ 854.635974] ? netlink_ack+0xb50/0xb50 [ 854.639878] ? kasan_check_read+0x11/0x20 [ 854.644035] ? netlink_deliver_tap+0x254/0xbf0 [ 854.648786] rtnetlink_rcv+0x1d/0x30 [ 854.652518] netlink_unicast+0x536/0x720 [ 854.656743] ? netlink_attachskb+0x770/0x770 [ 854.661168] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 854.666692] ? __check_object_size+0x3d/0x42f [ 854.671202] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 854.676378] netlink_sendmsg+0x8ae/0xd70 [ 854.680482] ? netlink_unicast+0x720/0x720 [ 854.684869] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 854.689739] ? apparmor_socket_sendmsg+0x2a/0x30 [ 854.694652] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.700204] ? security_socket_sendmsg+0x93/0xc0 [ 854.705111] ? netlink_unicast+0x720/0x720 [ 854.709361] sock_sendmsg+0xdd/0x130 [ 854.713253] ___sys_sendmsg+0x806/0x930 [ 854.717413] ? copy_msghdr_from_user+0x430/0x430 [ 854.722189] ? __local_bh_enable_ip+0x15a/0x270 [ 854.727033] ? lockdep_hardirqs_on+0x415/0x5d0 [ 854.731658] ? release_sock+0x158/0x1c0 [ 854.737032] ? trace_hardirqs_on+0x67/0x230 [ 854.741391] ? release_sock+0x158/0x1c0 [ 854.745535] ? __local_bh_enable_ip+0x15a/0x270 [ 854.750225] ? _raw_spin_unlock_bh+0x31/0x40 [ 854.754798] ? release_sock+0x158/0x1c0 [ 854.758788] ? sock_setsockopt+0x197/0x1f70 [ 854.763124] ? sock_enable_timestamp+0xe0/0xe0 [ 854.767869] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 854.772815] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 854.778509] ? __fget_light+0x1a9/0x230 [ 854.782507] ? __fdget+0x1b/0x20 [ 854.786111] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 854.791664] __sys_sendmsg+0x105/0x1d0 [ 854.795706] ? __ia32_sys_shutdown+0x80/0x80 [ 854.800154] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 854.805065] ? do_syscall_64+0x26/0x610 [ 854.809059] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.814577] ? do_syscall_64+0x26/0x610 [ 854.818571] __x64_sys_sendmsg+0x78/0xb0 [ 854.822644] do_syscall_64+0x103/0x610 [ 854.826694] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 854.831905] RIP: 0033:0x4459f9 [ 854.835253] Code: ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 <7a> fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd ff 11 7a fd [ 854.855260] RSP: 002b:00007ffc71f3f3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 854.862989] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459f9 [ 854.871220] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 854.878648] RBP: 00000000000a859e R08: 00000000004002c8 R09: 00000000004002c8 [ 854.886071] R10: 00000000200015a6 R11: 0000000000000246 R12: 0000000000406890 [ 854.893358] R13: 0000000000406920 R14: 0000000000000000 R15: 0000000000000000 [ 854.900821] [ 854.900821] Showing all locks held in the system: [ 854.907282] 3 locks held by kworker/1:1/22: [ 854.911605] #0: 0000000033c19b5f ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x87e/0x1790 [ 854.922304] #1: 00000000e069818e ((addr_chk_work).work){+.+.}, at: process_one_work+0x8b4/0x1790 [ 854.931477] #2: 0000000075173b79 (rtnl_mutex){+.+.}, at: rtnl_lock+0x17/0x20 [ 854.938935] 1 lock held by khungtaskd/1040: [ 854.943272] #0: 000000006bd894ba (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e [ 854.952052] 3 locks held by rs:main Q:Reg/7644: [ 854.956880] 1 lock held by rsyslogd/7646: [ 854.961031] #0: 000000008e90fe85 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 854.969096] 2 locks held by getty/7736: [ 854.973080] #0: 00000000a5f889f0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 854.981486] #1: 00000000a2b4fcc6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 854.990618] 2 locks held by getty/7737: [ 854.995540] #0: 00000000086a3886 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 855.003800] #1: 00000000baa38823 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 855.012820] 2 locks held by getty/7738: [ 855.016931] #0: 000000002b032c84 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 855.025408] #1: 00000000da454e1b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 855.034273] 2 locks held by getty/7739: [ 855.038381] #0: 00000000d94a42c0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 855.046809] #1: 000000001ae8de51 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 855.055812] 2 locks held by getty/7740: [ 855.059791] #0: 00000000b6c8b8c6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 855.068195] #1: 000000004483855f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 855.077190] 2 locks held by getty/7741: [ 855.081169] #0: 00000000c451b77c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 855.089569] #1: 00000000356f89ff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 855.098574] 2 locks held by getty/7742: [ 855.102548] #0: 000000006843720b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 855.110952] #1: 000000000e8d7521 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 [ 855.120005] 3 locks held by syz-executor772/7893: [ 855.125801] 1 lock held by syz-executor772/7895: [ 855.130560] #0: 0000000075173b79 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 [ 855.138879] 1 lock held by syz-executor772/7896: [ 855.143643] #0: 0000000075173b79 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 [ 855.152000] 1 lock held by syz-executor772/7897: [ 855.156881] #0: 0000000075173b79 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 [ 855.165206] 1 lock held by syz-executor772/7898: [ 855.169971] #0: 0000000075173b79 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 [ 855.178280] 1 lock held by syz-executor772/7899: [ 855.183058] #0: 0000000075173b79 (rtnl_mutex){+.+.}, at: rtnetlink_rcv_msg+0x40a/0xb00 [ 855.191372] [ 855.193053] ============================================= [ 855.193053] [ 855.200202] NMI backtrace for cpu 1 [ 855.203845] CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc6+ #66 [ 855.210684] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 855.220035] Call Trace: [ 855.222710] dump_stack+0x172/0x1f0 [ 855.226363] nmi_cpu_backtrace.cold+0x63/0xa4 [ 855.230923] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 855.235876] nmi_trigger_cpumask_backtrace+0x1be/0x236 [ 855.241162] arch_trigger_cpumask_backtrace+0x14/0x20 [ 855.246356] watchdog+0x9df/0xee0 [ 855.249828] kthread+0x357/0x430 [ 855.253201] ? reset_hung_task_detector+0x30/0x30 [ 855.258051] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 855.263596] ret_from_fork+0x3a/0x50 [ 855.267443] Sending NMI from CPU 1 to CPUs 0: [ 855.273808] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.626 msecs [ 855.273965] NMI backtrace for cpu 0 [ 855.273973] CPU: 0 PID: 7893 Comm: syz-executor772 Not tainted 5.0.0-rc6+ #66 [ 855.273981] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 855.273985] RIP: 0010:depot_save_stack+0x8e/0x460 [ 855.273999] Code: c2 0c 44 03 4a f4 03 42 f8 45 89 cb 41 89 d9 41 29 db 41 c1 c1 04 01 c3 45 31 d9 44 29 c8 41 89 c2 44 89 c8 41 01 d9 c1 c0 06 <44> 31 d0 29 c3 41 89 da 89 c3 44 01 c8 c1 c3 08 44 31 d3 41 89 da [ 855.274004] RSP: 0018:ffff88809963eec8 EFLAGS: 00000287 [ 855.274013] RAX: 000000008d888261 RBX: 000000006d920fd4 RCX: ffff88809963ef28 [ 855.274019] RDX: ffff88809963ef34 RSI: 00000000004112c0 RDI: 0000000000000018 [ 855.274025] RBP: ffff88809963ef00 R08: 000000000000002d R09: 00000000f3c831dd [ 855.274032] R10: 00000000efbf5031 R11: 00000000fffffba6 R12: 00000000004112c0 [ 855.274038] R13: ffff88809963ef10 R14: 0000000000000000 R15: ffff88812c3f0940 [ 855.274045] FS: 0000000001cb8880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 855.274050] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 855.274056] CR2: ffffffffff600400 CR3: 00000000a064a000 CR4: 00000000001406f0 [ 855.274062] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 855.274068] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 855.274071] Call Trace: [ 855.274076] save_stack+0xa9/0xd0 [ 855.274080] ? save_stack+0x45/0xd0 [ 855.274085] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 855.274089] ? kasan_slab_alloc+0xf/0x20 [ 855.274094] ? kmem_cache_alloc_node_trace+0x13c/0x720 [ 855.274098] ? __kmalloc_node_track_caller+0x3d/0x70 [ 855.274103] ? __kmalloc_reserve.isra.0+0x40/0xf0 [ 855.274107] ? pskb_expand_head+0x14e/0xdd0 [ 855.274111] ? netlink_trim+0x215/0x270 [ 855.274116] ? netlink_broadcast_filtered+0x64/0xb20 [ 855.274121] ? netlink_broadcast+0x3a/0x50 [ 855.274125] ? rtnetlink_send+0xdd/0x110 [ 855.274129] ? tcf_action_add+0x243/0x370 [ 855.274133] ? tc_ctl_action+0x3b6/0x4bd [ 855.274137] ? rtnetlink_rcv_msg+0x465/0xb00 [ 855.274142] ? netlink_rcv_skb+0x17a/0x460 [ 855.274146] ? rtnetlink_rcv+0x1d/0x30 [ 855.274150] ? netlink_unicast+0x536/0x720 [ 855.274154] ? netlink_sendmsg+0x8ae/0xd70 [ 855.274158] ? sock_sendmsg+0xdd/0x130 [ 855.274162] ? ___sys_sendmsg+0x806/0x930 [ 855.274166] ? __sys_sendmsg+0x105/0x1d0 [ 855.274171] ? __x64_sys_sendmsg+0x78/0xb0 [ 855.274175] ? do_syscall_64+0x103/0x610 [ 855.274180] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 855.274184] ? save_stack+0x45/0xd0 [ 855.274188] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 855.274193] ? kasan_slab_alloc+0xf/0x20 [ 855.274198] ? kmem_cache_alloc+0x12d/0x710 [ 855.274202] ? skb_clone+0x150/0x3b0 [ 855.274206] ? netlink_trim+0x1dd/0x270 [ 855.274211] ? netlink_broadcast_filtered+0x64/0xb20 [ 855.274215] ? netlink_broadcast+0x3a/0x50 [ 855.274219] ? rtnetlink_send+0xdd/0x110 [ 855.274223] ? tcf_action_add+0x243/0x370 [ 855.274227] ? tc_ctl_action+0x3b6/0x4bd [ 855.274231] ? rtnetlink_rcv_msg+0x465/0xb00 [ 855.274235] ? netlink_rcv_skb+0x17a/0x460 [ 855.274239] ? rtnetlink_rcv+0x1d/0x30 [ 855.274243] ? netlink_unicast+0x536/0x720 [ 855.274247] ? netlink_sendmsg+0x8ae/0xd70 [ 855.274251] ? sock_sendmsg+0xdd/0x130 [ 855.274256] ? ___sys_sendmsg+0x806/0x930 [ 855.274260] ? __sys_sendmsg+0x105/0x1d0 [ 855.274264] ? __x64_sys_sendmsg+0x78/0xb0 [ 855.274268] ? do_syscall_64+0x103/0x610 [ 855.274273] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 855.274282] ? mark_held_locks+0xb1/0x100 [ 855.274286] ? kasan_kmalloc+0x9/0x10 [ 855.274291] ? kmem_cache_alloc_node_trace+0x235/0x720 [ 855.274296] ? __kmalloc_node_track_caller+0x3d/0x70 [ 855.274301] ? kmem_cache_alloc_node_trace+0x235/0x720 [ 855.274305] ? kasan_unpoison_shadow+0x35/0x50 [ 855.274310] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 855.274314] kasan_slab_alloc+0xf/0x20 [ 855.274318] kmem_cache_alloc_node_trace+0x13c/0x720 [ 855.274322] ? memcpy+0x46/0x50 [ 855.274327] __kmalloc_node_track_caller+0x3d/0x70 [ 855.274331] __kmalloc_reserve.isra.0+0x40/0xf0 [ 855.274336] pskb_expand_head+0x14e/0xdd0 [ 855.274341] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 855.274345] netlink_trim+0x215/0x270 [ 855.274350] netlink_broadcast_filtered+0x64/0xb20 [ 855.274355] ? refcount_inc_not_zero_checked+0x147/0x200 [ 855.274359] netlink_broadcast+0x3a/0x50 [ 855.274363] rtnetlink_send+0xdd/0x110 [ 855.274367] tcf_action_add+0x243/0x370 [ 855.274372] ? tca_action_gd+0x17a0/0x17a0 [ 855.274376] ? tc_ctl_action+0x3c5/0x4bd [ 855.274380] tc_ctl_action+0x3b6/0x4bd [ 855.274384] ? tcf_action_add+0x370/0x370 [ 855.274388] ? __lock_is_held+0xb6/0x140 [ 855.274393] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 855.274397] ? tcf_action_add+0x370/0x370 [ 855.274402] rtnetlink_rcv_msg+0x465/0xb00 [ 855.274406] ? rtnetlink_put_metrics+0x560/0x560 [ 855.274411] ? netlink_deliver_tap+0x22d/0xbf0 [ 855.274415] ? find_held_lock+0x35/0x130 [ 855.274419] netlink_rcv_skb+0x17a/0x460 [ 855.274424] ? rtnetlink_put_metrics+0x560/0x560 [ 855.274428] ? netlink_ack+0xb50/0xb50 [ 855.274432] ? kasan_check_read+0x11/0x20 [ 855.274436] ? netlink_deliver_tap+0x254/0xbf0 [ 855.274440] rtnetlink_rcv+0x1d/0x30 [ 855.274444] netlink_unicast+0x536/0x720 [ 855.274449] ? netlink_attachskb+0x770/0x770 [ 855.274454] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 855.274458] ? __check_object_size+0x3d/0x42f [ 855.274463] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 855.274467] netlink_sendmsg+0x8ae/0xd70 [ 855.274471] ? netlink_unicast+0x720/0x720 [ 855.274476] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 855.274481] ? apparmor_socket_sendmsg+0x2a/0x30 [ 855.274486] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.274490] ? security_socket_sendmsg+0x93/0xc0 [ 855.274494] ? netlink_unicast+0x720/0x720 [ 855.274498] sock_sendmsg+0xdd/0x130 [ 855.274502] ___sys_sendmsg+0x806/0x930 [ 855.274507] ? copy_msghdr_from_user+0x430/0x430 [ 855.274511] ? __local_bh_enable_ip+0x15a/0x270 [ 855.274516] ? lockdep_hardirqs_on+0x415/0x5d0 [ 855.274520] ? release_sock+0x158/0x1c0 [ 855.274524] ? trace_hardirqs_on+0x67/0x230 [ 855.274528] ? release_sock+0x158/0x1c0 [ 855.274533] ? __local_bh_enable_ip+0x15a/0x270 [ 855.274537] ? _raw_spin_unlock_bh+0x31/0x40 [ 855.274542] ? release_sock+0x158/0x1c0 [ 855.274546] ? sock_setsockopt+0x197/0x1f70 [ 855.274550] ? sock_enable_timestamp+0xe0/0xe0 [ 855.274555] ? debug_lockdep_rcu_enabled+0x71/0xa0 [ 855.274560] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 855.274564] ? __fget_light+0x1a9/0x230 [ 855.274568] ? __fdget+0x1b/0x20 [ 855.274573] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 855.274577] __sys_sendmsg+0x105/0x1d0 [ 855.274581] ? __ia32_sys_shutdown+0x80/0x80 [ 855.274586] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 855.274590] ? do_syscall_64+0x26/0x610 [ 855.274595] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 855.274600] ? do_syscall_64+0x26/0x610 [ 855.274604] __x64_sys_sendmsg+0x78/0xb0 [ 855.274608] do_syscall_64+0x103/0x610 [ 855.274613] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 855.274617] RIP: 0033:0x4459f9 [ 855.274630] Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 0b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 855.274635] RSP: 002b:00007ffc71f3f3f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 855.274645] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004459f9 [ 855.274651] RDX: 00000000000000c4 RSI: 0000000020000300 RDI: 0000000000000003 [ 855.274657] RBP: 00000000000a85a4 R08: 00000000004002c8 R09: 00000000004002c8 [ 855.274663] R10: 00000000200015a6 R11: 0000000000000246 R12: 0000000000406890 [ 855.274670] R13: 0000000000406920 R14: 0000000000000000 R15: 0000000000000000 [ 855.276987] Kernel panic - not syncing: hung_task: blocked tasks [ 856.018101] CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc6+ #66 [ 856.024939] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 856.034303] Call Trace: [ 856.036927] dump_stack+0x172/0x1f0 [ 856.040583] panic+0x2cb/0x65c [ 856.043787] ? __warn_printk+0xf3/0xf3 [ 856.047690] ? lapic_can_unplug_cpu.cold+0x38/0x38 [ 856.052631] ? ___preempt_schedule+0x16/0x18 [ 856.057059] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 856.062546] ? nmi_trigger_cpumask_backtrace+0x1fa/0x236 [ 856.068004] ? nmi_trigger_cpumask_backtrace+0x204/0x236 [ 856.073473] ? nmi_trigger_cpumask_backtrace+0x19e/0x236 [ 856.079015] watchdog+0x9f0/0xee0 [ 856.082482] kthread+0x357/0x430 [ 856.085859] ? reset_hung_task_detector+0x30/0x30 [ 856.090708] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 856.096260] ret_from_fork+0x3a/0x50 [ 856.101355] Kernel Offset: disabled [ 856.104984] Rebooting in 86400 seconds..