[ 67.210375][ T24] audit: type=1800 audit(1565760286.908:27): pid=9822 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 67.235065][ T24] audit: type=1800 audit(1565760286.908:28): pid=9822 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. [ 68.002802][ T24] audit: type=1800 audit(1565760287.788:29): pid=9822 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 [ 68.023774][ T24] audit: type=1800 audit(1565760287.788:30): pid=9822 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 '10.128.15.226' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 718.892020][ T1057] INFO: task cron:9900 blocked for more than 143 seconds. [ 718.899296][ T1057] Not tainted 5.3.0-rc4+ #108 [ 718.904608][ T1057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.913666][ T1057] cron D25064 9900 1 0x00000000 [ 718.920191][ T1057] Call Trace: [ 718.923763][ T1057] __schedule+0x755/0x1580 [ 718.928187][ T1057] ? __sched_text_start+0x8/0x8 [ 718.933117][ T1057] ? lock_downgrade+0x920/0x920 [ 718.938264][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 718.943466][ T1057] ? __mutex_lock+0x5b4/0x13c0 [ 718.948686][ T1057] schedule+0xa8/0x270 [ 718.952927][ T1057] schedule_preempt_disabled+0x13/0x20 [ 718.958665][ T1057] __mutex_lock+0x7b0/0x13c0 [ 718.963880][ T1057] ? fuse_lock_inode+0xba/0xf0 [ 718.968885][ T1057] ? mutex_lock_io_nested+0x1260/0x1260 [ 718.974525][ T1057] ? __kasan_check_read+0x11/0x20 [ 718.979703][ T1057] ? d_alloc+0x6d/0x280 [ 718.983951][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 718.990530][ T1057] ? lock_downgrade+0x920/0x920 [ 718.995600][ T1057] ? __lookup_slow+0x1ab/0x500 [ 719.000440][ T1057] ? trace_hardirqs_on+0x67/0x240 [ 719.005713][ T1057] mutex_lock_nested+0x16/0x20 [ 719.010744][ T1057] ? mutex_lock_nested+0x16/0x20 [ 719.015785][ T1057] fuse_lock_inode+0xba/0xf0 [ 719.020389][ T1057] fuse_lookup+0x8e/0x360 [ 719.024935][ T1057] ? fuse_lookup_name+0x670/0x670 [ 719.030069][ T1057] ? __d_lookup_rcu+0x6c0/0x6c0 [ 719.035014][ T1057] ? __kasan_check_write+0x14/0x20 [ 719.040131][ T1057] ? lockdep_init_map+0x1be/0x6d0 [ 719.045324][ T1057] ? lockdep_init_map+0x1be/0x6d0 [ 719.050392][ T1057] __lookup_slow+0x279/0x500 [ 719.055145][ T1057] ? vfs_unlink+0x620/0x620 [ 719.059677][ T1057] ? trailing_symlink+0x990/0x990 [ 719.064920][ T1057] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 719.070646][ T1057] lookup_slow+0x58/0x80 [ 719.075274][ T1057] walk_component+0x747/0x2000 [ 719.080111][ T1057] ? path_init+0x122c/0x18f0 [ 719.084778][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.089972][ T1057] ? unwind_get_return_address+0x61/0xa0 [ 719.095969][ T1057] ? path_init+0x18f0/0x18f0 [ 719.100790][ T1057] ? fuse_allow_current_process+0x113/0x350 [ 719.106894][ T1057] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 719.113183][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 719.119585][ T1057] ? security_inode_permission+0xcb/0x100 [ 719.125374][ T1057] ? inode_permission+0xb4/0x560 [ 719.130673][ T1057] link_path_walk.part.0+0x9a4/0x1340 [ 719.136130][ T1057] ? walk_component+0x2000/0x2000 [ 719.141142][ T1057] ? save_stack+0x23/0x90 [ 719.145829][ T1057] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 719.151843][ T1057] ? kasan_slab_alloc+0xf/0x20 [ 719.156588][ T1057] ? kmem_cache_alloc+0x121/0x710 [ 719.161946][ T1057] ? getname_flags+0xd6/0x5b0 [ 719.166707][ T1057] ? cp_new_stat+0x5d0/0x5f0 [ 719.171396][ T1057] path_lookupat.isra.0+0xe3/0x8d0 [ 719.176620][ T1057] ? path_parentat.isra.0+0x160/0x160 [ 719.182378][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.187488][ T1057] ? __alloc_pages_nodemask+0x578/0x900 [ 719.193548][ T1057] ? cache_grow_end+0xa4/0x190 [ 719.198667][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.203947][ T1057] filename_lookup+0x1b0/0x410 [ 719.208861][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 719.213894][ T1057] ? nd_jump_link+0x1d0/0x1d0 [ 719.218778][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 719.225117][ T1057] ? __phys_addr_symbol+0x30/0x70 [ 719.230221][ T1057] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 719.236010][ T1057] ? __check_object_size+0x3d/0x43c [ 719.241209][ T1057] ? strncpy_from_user+0x2b4/0x400 [ 719.246665][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 719.253276][ T1057] ? getname_flags+0x277/0x5b0 [ 719.258208][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 719.263565][ T1057] user_path_at_empty+0x43/0x50 [ 719.268507][ T1057] vfs_statx+0x129/0x200 [ 719.273005][ T1057] ? vfs_statx_fd+0xc0/0xc0 [ 719.277512][ T1057] ? lock_downgrade+0x920/0x920 [ 719.282476][ T1057] __do_sys_newstat+0xa4/0x130 [ 719.287522][ T1057] ? cp_new_stat+0x5f0/0x5f0 [ 719.292298][ T1057] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 719.298046][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 719.304562][ T1057] ? __x64_sys_time+0x89/0xa0 [ 719.309427][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 719.315861][ T1057] ? emulate_vsyscall+0x30c/0xc20 [ 719.321150][ T1057] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 719.327624][ T1057] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 719.333947][ T1057] ? trace_hardirqs_off_caller+0x65/0x230 [ 719.339809][ T1057] __x64_sys_newstat+0x54/0x80 [ 719.344766][ T1057] do_syscall_64+0xfd/0x6a0 [ 719.349635][ T1057] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 719.355926][ T1057] RIP: 0033:0x7f5beb7e8c65 [ 719.360552][ T1057] Code: Bad RIP value. [ 719.364696][ T1057] RSP: 002b:00007fffecf5a5c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 [ 719.373695][ T1057] RAX: ffffffffffffffda RBX: 00007f5beb866aa4 RCX: 00007f5beb7e8c65 [ 719.382255][ T1057] RDX: 00007fffecf5a610 RSI: 00007fffecf5a610 RDI: 00007f5beb866aa4 [ 719.390507][ T1057] RBP: 00007fffecf5a710 R08: 0000000001013240 R09: 0000000000000000 [ 719.398712][ T1057] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000 [ 719.406989][ T1057] R13: 0000000000000001 R14: 000000000000002f R15: 0000000000000000 [ 719.415701][ T1057] INFO: task syz-executor385:9979 blocked for more than 143 seconds. [ 719.423906][ T1057] Not tainted 5.3.0-rc4+ #108 [ 719.429406][ T1057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 719.438343][ T1057] syz-executor385 D28336 9979 9977 0x00000000 [ 719.444889][ T1057] Call Trace: [ 719.448194][ T1057] __schedule+0x755/0x1580 [ 719.452707][ T1057] ? __sched_text_start+0x8/0x8 [ 719.457875][ T1057] ? lock_downgrade+0x920/0x920 [ 719.463097][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 719.468198][ T1057] ? __mutex_lock+0x5b4/0x13c0 [ 719.473133][ T1057] schedule+0xa8/0x270 [ 719.477218][ T1057] schedule_preempt_disabled+0x13/0x20 [ 719.482974][ T1057] __mutex_lock+0x7b0/0x13c0 [ 719.487572][ T1057] ? fuse_lock_inode+0xba/0xf0 [ 719.492441][ T1057] ? mutex_lock_io_nested+0x1260/0x1260 [ 719.498549][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.503756][ T1057] ? d_alloc+0x6d/0x280 [ 719.507994][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 719.514447][ T1057] ? lock_downgrade+0x920/0x920 [ 719.519554][ T1057] ? __lookup_slow+0x1ab/0x500 [ 719.524553][ T1057] ? trace_hardirqs_on+0x67/0x240 [ 719.529845][ T1057] mutex_lock_nested+0x16/0x20 [ 719.534946][ T1057] ? mutex_lock_nested+0x16/0x20 [ 719.540101][ T1057] fuse_lock_inode+0xba/0xf0 [ 719.544902][ T1057] fuse_lookup+0x8e/0x360 [ 719.549525][ T1057] ? fuse_lookup_name+0x670/0x670 [ 719.555019][ T1057] ? __d_lookup_rcu+0x6c0/0x6c0 [ 719.560049][ T1057] ? __kasan_check_write+0x14/0x20 [ 719.565411][ T1057] ? lockdep_init_map+0x1be/0x6d0 [ 719.570826][ T1057] ? lockdep_init_map+0x1be/0x6d0 [ 719.575981][ T1057] __lookup_slow+0x279/0x500 [ 719.580723][ T1057] ? vfs_unlink+0x620/0x620 [ 719.585728][ T1057] ? trailing_symlink+0x990/0x990 [ 719.590862][ T1057] lookup_slow+0x58/0x80 [ 719.595208][ T1057] walk_component+0x747/0x2000 [ 719.599965][ T1057] ? path_init+0x122c/0x18f0 [ 719.604746][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.609866][ T1057] ? path_init+0x18f0/0x18f0 [ 719.614527][ T1057] ? fuse_allow_current_process+0x113/0x350 [ 719.620496][ T1057] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 719.626840][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 719.633290][ T1057] ? security_inode_permission+0xcb/0x100 [ 719.639295][ T1057] ? inode_permission+0xb4/0x560 [ 719.644619][ T1057] link_path_walk.part.0+0x9a4/0x1340 [ 719.650081][ T1057] ? walk_component+0x2000/0x2000 [ 719.655157][ T1057] path_openat+0x202/0x4630 [ 719.659802][ T1057] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 719.665714][ T1057] ? kasan_slab_alloc+0xf/0x20 [ 719.670600][ T1057] ? kmem_cache_alloc+0x121/0x710 [ 719.675849][ T1057] ? getname_flags+0xd6/0x5b0 [ 719.680787][ T1057] ? getname+0x1a/0x20 [ 719.684969][ T1057] ? do_sys_open+0x2c9/0x5d0 [ 719.689689][ T1057] ? __isolate_free_page+0x4c0/0x4c0 [ 719.695147][ T1057] ? path_lookupat.isra.0+0x8d0/0x8d0 [ 719.700716][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.705973][ T1057] ? __alloc_pages_nodemask+0x578/0x900 [ 719.711653][ T1057] ? cache_grow_end+0xa4/0x190 [ 719.716518][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.721715][ T1057] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 719.727515][ T1057] do_filp_open+0x1a1/0x280 [ 719.732079][ T1057] ? may_open_dev+0x100/0x100 [ 719.737063][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.742260][ T1057] ? do_raw_spin_unlock+0x57/0x270 [ 719.747387][ T1057] ? _raw_spin_unlock+0x2d/0x50 [ 719.752323][ T1057] ? __alloc_fd+0x487/0x620 [ 719.756818][ T1057] do_sys_open+0x3fe/0x5d0 [ 719.761284][ T1057] ? filp_open+0x80/0x80 [ 719.765765][ T1057] ? switch_fpu_return+0x1fa/0x4f0 [ 719.771232][ T1057] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 719.777381][ T1057] __x64_sys_open+0x7e/0xc0 [ 719.781901][ T1057] do_syscall_64+0xfd/0x6a0 [ 719.786594][ T1057] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 719.792705][ T1057] RIP: 0033:0x444ca0 [ 719.796898][ T1057] Code: 31 c0 e9 45 ff ff ff 0f 1f 00 80 3f 00 0f 84 f7 00 00 00 55 53 b9 02 00 00 00 be 00 08 09 00 89 c8 48 81 ec 98 00 00 00 0f 05 <48> 3d 00 f0 ff ff 48 89 c3 0f 87 e9 00 00 00 85 db 0f 88 2f 01 00 [ 719.818499][ T1057] RSP: 002b:00007ffd34cf7ce0 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 [ 719.827164][ T1057] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444ca0 [ 719.836140][ T1057] RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004ae91e [ 719.844432][ T1057] RBP: 0000000000002700 R08: 00000000000026fb R09: 00005555557cf880 [ 719.853128][ T1057] R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd34cf7f10 [ 719.861483][ T1057] R13: 00000000004075d0 R14: 0000000000000000 R15: 0000000000000000 [ 719.869692][ T1057] INFO: task syz-executor385:9984 blocked for more than 144 seconds. [ 719.878395][ T1057] Not tainted 5.3.0-rc4+ #108 [ 719.883754][ T1057] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 719.894031][ T1057] syz-executor385 D28336 9984 9979 0x00000004 [ 719.900574][ T1057] Call Trace: [ 719.904009][ T1057] __schedule+0x755/0x1580 [ 719.908487][ T1057] ? __sched_text_start+0x8/0x8 [ 719.913868][ T1057] ? lock_downgrade+0x920/0x920 [ 719.919010][ T1057] ? rwlock_bug.part.0+0x90/0x90 [ 719.924070][ T1057] ? __mutex_lock+0x5b4/0x13c0 [ 719.929123][ T1057] schedule+0xa8/0x270 [ 719.933303][ T1057] schedule_preempt_disabled+0x13/0x20 [ 719.939317][ T1057] __mutex_lock+0x7b0/0x13c0 [ 719.944358][ T1057] ? fuse_lock_inode+0xba/0xf0 [ 719.949321][ T1057] ? mutex_lock_io_nested+0x1260/0x1260 [ 719.955810][ T1057] ? __kasan_check_read+0x11/0x20 [ 719.960964][ T1057] ? d_alloc+0x6d/0x280 [ 719.965296][ T1057] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 719.972182][ T1057] ? lock_downgrade+0x920/0x920 [ 719.977342][ T1057] ? __lookup_slow+0x1ab/0x500 [ 719.982514][ T1057] ? trace_hardirqs_on+0x67/0x240 [ 719.988092][ T1057] mutex_lock_nested+0x16/0x20 [ 719.993511][ T1057] ? mutex_lock_nested+0x16/0x20 [ 719.998992][ T1057] fuse_lock_inode+0xba/0xf0 [ 720.003761][ T1057] fuse_lookup+0x8e/0x360 [ 720.008239][ T1057] ? fuse_lookup_name+0x670/0x670 [ 720.013728][ T1057] ? __d_lookup_rcu+0x6c0/0x6c0 [ 720.018862][ T1057] ? __kasan_check_write+0x14/0x20 [ 720.024162][ T1057] ? lockdep_init_map+0x1be/0x6d0 [ 720.029372][ T1057] ? lockdep_init_map+0x1be/0x6d0 [ 720.034729][ T1057] __lookup_slow+0x279/0x500 [ 720.039753][ T1057] ? vfs_unlink+0x620/0x620 [ 720.044589][ T1057] ? trailing_symlink+0x990/0x990 [ 720.049850][ T1057] lookup_slow+0x58/0x80 [ 720.055755][ T1057] walk_component+0x747/0x2000 [ 720.063103][ T1057] ? path_init+0x122c/0x18f0 [ 720.068060][ T1057] ? __kasan_check_read+0x11/0x20 [ 720.073337][ T1057] ? path_init+0x18f0/0x18f0 [ 720.078112][ T1057] ? fuse_allow_current_process+0x113/0x350 [ 720.084374][ T1057] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 720.090967][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 720.097407][ T1057] ? security_inode_permission+0xcb/0x100 [ 720.103678][ T1057] ? inode_permission+0xb4/0x560 [ 720.108800][ T1057] link_path_walk.part.0+0x9a4/0x1340 [ 720.114364][ T1057] ? walk_component+0x2000/0x2000 [ 720.119400][ T1057] path_openat+0x202/0x4630 [ 720.123963][ T1057] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 720.130058][ T1057] ? kasan_slab_alloc+0xf/0x20 [ 720.135371][ T1057] ? kmem_cache_alloc+0x121/0x710 [ 720.140739][ T1057] ? getname_flags+0xd6/0x5b0 [ 720.146349][ T1057] ? getname+0x1a/0x20 [ 720.150800][ T1057] ? do_sys_open+0x2c9/0x5d0 [ 720.155897][ T1057] ? __isolate_free_page+0x4c0/0x4c0 [ 720.161204][ T1057] ? path_lookupat.isra.0+0x8d0/0x8d0 [ 720.167431][ T1057] ? __kasan_check_read+0x11/0x20 [ 720.173627][ T1057] ? __alloc_pages_nodemask+0x578/0x900 [ 720.180308][ T1057] ? cache_grow_end+0xa4/0x190 [ 720.185557][ T1057] ? __kasan_check_read+0x11/0x20 [ 720.190595][ T1057] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 720.196506][ T1057] do_filp_open+0x1a1/0x280 [ 720.201021][ T1057] ? may_open_dev+0x100/0x100 [ 720.205794][ T1057] ? __kasan_check_read+0x11/0x20 [ 720.210996][ T1057] ? do_raw_spin_unlock+0x57/0x270 [ 720.216772][ T1057] ? _raw_spin_unlock+0x2d/0x50 [ 720.222571][ T1057] ? __alloc_fd+0x487/0x620 [ 720.227313][ T1057] do_sys_open+0x3fe/0x5d0 [ 720.231923][ T1057] ? filp_open+0x80/0x80 [ 720.237130][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 720.243648][ T1057] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 720.250686][ T1057] __x64_sys_open+0x7e/0xc0 [ 720.256234][ T1057] do_syscall_64+0xfd/0x6a0 [ 720.260837][ T1057] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 720.267226][ T1057] RIP: 0033:0x405810 [ 720.271157][ T1057] Code: 01 f0 ff ff 0f 83 d0 18 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 1d c3 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 a4 18 00 00 c3 48 83 ec 08 e8 0a fc ff ff [ 720.292331][ T1057] RSP: 002b:00007ffd34cf79e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 720.301349][ T1057] RAX: ffffffffffffffda RBX: 00007ffd34cf7a14 RCX: 0000000000405810 [ 720.310888][ T1057] RDX: 00007ffd34cf7a1a RSI: 0000000000080001 RDI: 00000000004ae93c [ 720.319580][ T1057] RBP: 00007ffd34cf7a10 R08: 0000000000000000 R09: 0000000000000004 [ 720.328426][ T1057] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000407540 [ 720.337046][ T1057] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 720.346047][ T1057] INFO: lockdep is turned off. [ 720.351064][ T1057] NMI backtrace for cpu 1 [ 720.355489][ T1057] CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc4+ #108 [ 720.363417][ T1057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.374511][ T1057] Call Trace: [ 720.378075][ T1057] dump_stack+0x172/0x1f0 [ 720.382583][ T1057] nmi_cpu_backtrace.cold+0x70/0xb2 [ 720.387846][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 720.395680][ T1057] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 720.401820][ T1057] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 720.407928][ T1057] arch_trigger_cpumask_backtrace+0x14/0x20 [ 720.414537][ T1057] watchdog+0x9d0/0xef0 [ 720.418895][ T1057] kthread+0x361/0x430 [ 720.423096][ T1057] ? reset_hung_task_detector+0x30/0x30 [ 720.428857][ T1057] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 720.435151][ T1057] ret_from_fork+0x24/0x30 [ 720.439914][ T1057] Sending NMI from CPU 1 to CPUs 0: [ 720.445304][ C0] NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 [ 720.446255][ T1057] Kernel panic - not syncing: hung_task: blocked tasks [ 720.460920][ T1057] CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc4+ #108 [ 720.469847][ T1057] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.480274][ T1057] Call Trace: [ 720.484044][ T1057] dump_stack+0x172/0x1f0 [ 720.488631][ T1057] panic+0x2dc/0x755 [ 720.492848][ T1057] ? add_taint.cold+0x16/0x16 [ 720.497538][ T1057] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 720.503424][ T1057] ? printk_safe_flush+0xf2/0x140 [ 720.508812][ T1057] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 720.515317][ T1057] ? nmi_trigger_cpumask_backtrace+0x224/0x28b [ 720.521855][ T1057] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 720.528213][ T1057] watchdog+0x9e1/0xef0 [ 720.532354][ T1057] kthread+0x361/0x430 [ 720.536430][ T1057] ? reset_hung_task_detector+0x30/0x30 [ 720.542093][ T1057] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 720.548472][ T1057] ret_from_fork+0x24/0x30 [ 720.554077][ T1057] Kernel Offset: disabled [ 720.558422][ T1057] Rebooting in 86400 seconds..