Warning: Permanently added '10.128.0.80' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 595.884586][ T1137] INFO: task syz-executor740:7060 blocked for more than 143 seconds. [ 595.884609][ T1137] Not tainted 5.7.0-rc1-syzkaller #0 [ 595.884615][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.884622][ T1137] syz-executor740 D28488 7060 7058 0x20024004 [ 595.884648][ T1137] Call Trace: [ 595.884829][ T1137] ? __schedule+0x937/0x1ff0 [ 595.884863][ T1137] ? __sched_text_start+0x8/0x8 [ 595.884890][ T1137] schedule+0xd0/0x2a0 [ 595.884909][ T1137] schedule_preempt_disabled+0xf/0x20 [ 595.884921][ T1137] __mutex_lock+0x7ab/0x13c0 [ 595.884966][ T1137] ? fb_open+0xd3/0x430 [ 595.884985][ T1137] ? mutex_trylock+0x2c0/0x2c0 [ 595.885003][ T1137] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.885058][ T1137] ? chrdev_open+0xc4/0x5c0 [ 595.885098][ T1137] ? lock_downgrade+0x840/0x840 [ 595.885121][ T1137] ? fb_open+0xd3/0x430 [ 595.885133][ T1137] fb_open+0xd3/0x430 [ 595.885149][ T1137] ? get_fb_info.part.0+0x80/0x80 [ 595.885162][ T1137] chrdev_open+0x219/0x5c0 [ 595.885178][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.885222][ T1137] ? security_file_open+0x84/0x410 [ 595.885241][ T1137] do_dentry_open+0x4ba/0x1290 [ 595.885257][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.885291][ T1137] ? security_inode_permission+0xc4/0xf0 [ 595.885306][ T1137] ? chown_common+0x550/0x550 [ 595.885322][ T1137] ? inode_permission+0xab/0x500 [ 595.885344][ T1137] path_openat+0x1e59/0x27d0 [ 595.885368][ T1137] ? path_lookupat.isra.0+0x530/0x530 [ 595.885399][ T1137] do_filp_open+0x192/0x260 [ 595.885415][ T1137] ? may_open_dev+0xf0/0xf0 [ 595.885457][ T1137] ? do_raw_spin_lock+0x129/0x2e0 [ 595.885483][ T1137] ? _raw_spin_unlock+0x24/0x40 [ 595.885503][ T1137] ? __alloc_fd+0x46d/0x600 [ 595.885527][ T1137] do_sys_openat2+0x585/0x7d0 [ 595.885545][ T1137] ? file_open_root+0x400/0x400 [ 595.885573][ T1137] do_sys_open+0xc3/0x140 [ 595.885587][ T1137] ? filp_open+0x70/0x70 [ 595.885632][ T1137] ? fpregs_mark_activate+0x320/0x320 [ 595.885670][ T1137] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.885699][ T1137] do_fast_syscall_32+0x270/0xe90 [ 595.885737][ T1137] entry_SYSENTER_compat+0x70/0x7f [ 595.885768][ T1137] INFO: task syz-executor740:7061 blocked for more than 143 seconds. [ 595.885777][ T1137] Not tainted 5.7.0-rc1-syzkaller #0 [ 595.885782][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.885789][ T1137] syz-executor740 D28208 7061 7057 0x20024004 [ 595.885812][ T1137] Call Trace: [ 595.885832][ T1137] ? __schedule+0x937/0x1ff0 [ 595.885854][ T1137] ? __sched_text_start+0x8/0x8 [ 595.885886][ T1137] schedule+0xd0/0x2a0 [ 595.885905][ T1137] schedule_preempt_disabled+0xf/0x20 [ 595.885916][ T1137] __mutex_lock+0x7ab/0x13c0 [ 595.885933][ T1137] ? fb_open+0xd3/0x430 [ 595.885951][ T1137] ? mutex_trylock+0x2c0/0x2c0 [ 595.885969][ T1137] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.885981][ T1137] ? chrdev_open+0xc4/0x5c0 [ 595.886001][ T1137] ? lock_downgrade+0x840/0x840 [ 595.886023][ T1137] ? fb_open+0xd3/0x430 [ 595.886035][ T1137] fb_open+0xd3/0x430 [ 595.886051][ T1137] ? get_fb_info.part.0+0x80/0x80 [ 595.886063][ T1137] chrdev_open+0x219/0x5c0 [ 595.886079][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.886097][ T1137] ? security_file_open+0x84/0x410 [ 595.886115][ T1137] do_dentry_open+0x4ba/0x1290 [ 595.886130][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.886148][ T1137] ? security_inode_permission+0xc4/0xf0 [ 595.886162][ T1137] ? chown_common+0x550/0x550 [ 595.886177][ T1137] ? inode_permission+0xab/0x500 [ 595.886199][ T1137] path_openat+0x1e59/0x27d0 [ 595.886224][ T1137] ? path_lookupat.isra.0+0x530/0x530 [ 595.886254][ T1137] do_filp_open+0x192/0x260 [ 595.886270][ T1137] ? may_open_dev+0xf0/0xf0 [ 595.886292][ T1137] ? do_raw_spin_lock+0x129/0x2e0 [ 595.886318][ T1137] ? _raw_spin_unlock+0x24/0x40 [ 595.886331][ T1137] ? __alloc_fd+0x46d/0x600 [ 595.886354][ T1137] do_sys_openat2+0x585/0x7d0 [ 595.886371][ T1137] ? file_open_root+0x400/0x400 [ 595.886399][ T1137] do_sys_open+0xc3/0x140 [ 595.886413][ T1137] ? filp_open+0x70/0x70 [ 595.886432][ T1137] ? fpregs_mark_activate+0x320/0x320 [ 595.886447][ T1137] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.886468][ T1137] do_fast_syscall_32+0x270/0xe90 [ 595.886488][ T1137] entry_SYSENTER_compat+0x70/0x7f [ 595.886516][ T1137] INFO: task syz-executor740:7062 blocked for more than 143 seconds. [ 595.886524][ T1137] Not tainted 5.7.0-rc1-syzkaller #0 [ 595.886530][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.886537][ T1137] syz-executor740 D27840 7062 7054 0x20020004 [ 595.886559][ T1137] Call Trace: [ 595.886578][ T1137] ? __schedule+0x937/0x1ff0 [ 595.886600][ T1137] ? __sched_text_start+0x8/0x8 [ 595.886626][ T1137] schedule+0xd0/0x2a0 [ 595.886644][ T1137] schedule_preempt_disabled+0xf/0x20 [ 595.886656][ T1137] __mutex_lock+0x7ab/0x13c0 [ 595.886672][ T1137] ? fb_open+0xd3/0x430 [ 595.886690][ T1137] ? mutex_trylock+0x2c0/0x2c0 [ 595.886708][ T1137] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.886720][ T1137] ? chrdev_open+0xc4/0x5c0 [ 595.886740][ T1137] ? lock_downgrade+0x840/0x840 [ 595.886762][ T1137] ? fb_open+0xd3/0x430 [ 595.886774][ T1137] fb_open+0xd3/0x430 [ 595.886790][ T1137] ? get_fb_info.part.0+0x80/0x80 [ 595.886802][ T1137] chrdev_open+0x219/0x5c0 [ 595.886818][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.886835][ T1137] ? security_file_open+0x84/0x410 [ 595.886853][ T1137] do_dentry_open+0x4ba/0x1290 [ 595.886875][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.886893][ T1137] ? security_inode_permission+0xc4/0xf0 [ 595.886906][ T1137] ? chown_common+0x550/0x550 [ 595.886922][ T1137] ? inode_permission+0xab/0x500 [ 595.886944][ T1137] path_openat+0x1e59/0x27d0 [ 595.886968][ T1137] ? path_lookupat.isra.0+0x530/0x530 [ 595.886999][ T1137] do_filp_open+0x192/0x260 [ 595.887028][ T1137] ? may_open_dev+0xf0/0xf0 [ 595.887050][ T1137] ? do_raw_spin_lock+0x129/0x2e0 [ 595.887076][ T1137] ? _raw_spin_unlock+0x24/0x40 [ 595.887089][ T1137] ? __alloc_fd+0x46d/0x600 [ 595.887113][ T1137] do_sys_openat2+0x585/0x7d0 [ 595.887130][ T1137] ? file_open_root+0x400/0x400 [ 595.887157][ T1137] do_sys_open+0xc3/0x140 [ 595.887171][ T1137] ? filp_open+0x70/0x70 [ 595.887191][ T1137] ? fpregs_mark_activate+0x320/0x320 [ 595.887206][ T1137] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.887227][ T1137] do_fast_syscall_32+0x270/0xe90 [ 595.887247][ T1137] entry_SYSENTER_compat+0x70/0x7f [ 595.887275][ T1137] INFO: task syz-executor740:7063 blocked for more than 143 seconds. [ 595.887284][ T1137] Not tainted 5.7.0-rc1-syzkaller #0 [ 595.887289][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.887296][ T1137] syz-executor740 D28288 7063 7059 0x20020004 [ 595.887318][ T1137] Call Trace: [ 595.887337][ T1137] ? __schedule+0x937/0x1ff0 [ 595.887358][ T1137] ? __sched_text_start+0x8/0x8 [ 595.887384][ T1137] schedule+0xd0/0x2a0 [ 595.887402][ T1137] schedule_preempt_disabled+0xf/0x20 [ 595.887414][ T1137] __mutex_lock+0x7ab/0x13c0 [ 595.887430][ T1137] ? fb_open+0xd3/0x430 [ 595.887448][ T1137] ? mutex_trylock+0x2c0/0x2c0 [ 595.887466][ T1137] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.887479][ T1137] ? chrdev_open+0xc4/0x5c0 [ 595.887499][ T1137] ? lock_downgrade+0x840/0x840 [ 595.887521][ T1137] ? fb_open+0xd3/0x430 [ 595.887533][ T1137] fb_open+0xd3/0x430 [ 595.887549][ T1137] ? get_fb_info.part.0+0x80/0x80 [ 595.887561][ T1137] chrdev_open+0x219/0x5c0 [ 595.887577][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.887595][ T1137] ? security_file_open+0x84/0x410 [ 595.887612][ T1137] do_dentry_open+0x4ba/0x1290 [ 595.887628][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.887646][ T1137] ? security_inode_permission+0xc4/0xf0 [ 595.887659][ T1137] ? chown_common+0x550/0x550 [ 595.887675][ T1137] ? inode_permission+0xab/0x500 [ 595.887697][ T1137] path_openat+0x1e59/0x27d0 [ 595.887722][ T1137] ? path_lookupat.isra.0+0x530/0x530 [ 595.887752][ T1137] do_filp_open+0x192/0x260 [ 595.887768][ T1137] ? may_open_dev+0xf0/0xf0 [ 595.887790][ T1137] ? do_raw_spin_lock+0x129/0x2e0 [ 595.887816][ T1137] ? _raw_spin_unlock+0x24/0x40 [ 595.887829][ T1137] ? __alloc_fd+0x46d/0x600 [ 595.887852][ T1137] do_sys_openat2+0x585/0x7d0 [ 595.887874][ T1137] ? file_open_root+0x400/0x400 [ 595.887902][ T1137] do_sys_open+0xc3/0x140 [ 595.887916][ T1137] ? filp_open+0x70/0x70 [ 595.887935][ T1137] ? fpregs_mark_activate+0x320/0x320 [ 595.887950][ T1137] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.887971][ T1137] do_fast_syscall_32+0x270/0xe90 [ 595.887991][ T1137] entry_SYSENTER_compat+0x70/0x7f [ 595.888025][ T1137] INFO: task syz-executor740:7064 blocked for more than 143 seconds. [ 595.888033][ T1137] Not tainted 5.7.0-rc1-syzkaller #0 [ 595.888039][ T1137] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.888045][ T1137] syz-executor740 D28488 7064 7056 0x20020004 [ 595.888067][ T1137] Call Trace: [ 595.888086][ T1137] ? __schedule+0x937/0x1ff0 [ 595.888108][ T1137] ? __sched_text_start+0x8/0x8 [ 595.888134][ T1137] schedule+0xd0/0x2a0 [ 595.888152][ T1137] schedule_preempt_disabled+0xf/0x20 [ 595.888164][ T1137] __mutex_lock+0x7ab/0x13c0 [ 595.888180][ T1137] ? fb_open+0xd3/0x430 [ 595.888198][ T1137] ? mutex_trylock+0x2c0/0x2c0 [ 595.888216][ T1137] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.888229][ T1137] ? chrdev_open+0xc4/0x5c0 [ 595.888248][ T1137] ? lock_downgrade+0x840/0x840 [ 595.888271][ T1137] ? fb_open+0xd3/0x430 [ 595.888282][ T1137] fb_open+0xd3/0x430 [ 595.888298][ T1137] ? get_fb_info.part.0+0x80/0x80 [ 595.888311][ T1137] chrdev_open+0x219/0x5c0 [ 595.888327][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.888344][ T1137] ? security_file_open+0x84/0x410 [ 595.888361][ T1137] do_dentry_open+0x4ba/0x1290 [ 595.888377][ T1137] ? cdev_put.part.0+0x50/0x50 [ 595.888395][ T1137] ? security_inode_permission+0xc4/0xf0 [ 595.888408][ T1137] ? chown_common+0x550/0x550 [ 595.888424][ T1137] ? inode_permission+0xab/0x500 [ 595.888446][ T1137] path_openat+0x1e59/0x27d0 [ 595.888470][ T1137] ? path_lookupat.isra.0+0x530/0x530 [ 595.888501][ T1137] do_filp_open+0x192/0x260 [ 595.888517][ T1137] ? may_open_dev+0xf0/0xf0 [ 595.888539][ T1137] ? do_raw_spin_lock+0x129/0x2e0 [ 595.888565][ T1137] ? _raw_spin_unlock+0x24/0x40 [ 595.888578][ T1137] ? __alloc_fd+0x46d/0x600 [ 595.888602][ T1137] do_sys_openat2+0x585/0x7d0 [ 595.888619][ T1137] ? file_open_root+0x400/0x400 [ 595.888646][ T1137] do_sys_open+0xc3/0x140 [ 595.888660][ T1137] ? filp_open+0x70/0x70 [ 595.888680][ T1137] ? fpregs_mark_activate+0x320/0x320 [ 595.888694][ T1137] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.888716][ T1137] do_fast_syscall_32+0x270/0xe90 [ 595.888736][ T1137] entry_SYSENTER_compat+0x70/0x7f [ 595.888760][ T1137] [ 595.888760][ T1137] Showing all locks held in the system: [ 595.888772][ T1137] 1 lock held by khungtaskd/1137: [ 595.888777][ T1137] #0: ffffffff899bed00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 595.888826][ T1137] 1 lock held by in:imklog/6737: [ 595.888832][ T1137] #0: ffff8880a21828b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 595.888872][ T1137] 2 locks held by syz-executor740/7055: [ 595.888881][ T1137] 1 lock held by syz-executor740/7060: [ 595.888886][ T1137] #0: ffff888218cdf078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 595.888917][ T1137] 1 lock held by syz-executor740/7061: [ 595.888922][ T1137] #0: ffff888218cdf078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 595.888953][ T1137] 1 lock held by syz-executor740/7062: [ 595.888958][ T1137] #0: ffff888218cdf078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 595.888988][ T1137] 1 lock held by syz-executor740/7063: [ 595.888993][ T1137] #0: ffff888218cdf078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 595.889024][ T1137] 1 lock held by syz-executor740/7064: [ 595.889029][ T1137] #0: ffff888218cdf078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 595.889056][ T1137] [ 595.889061][ T1137] ============================================= [ 595.889061][ T1137] [ 595.889068][ T1137] NMI backtrace for cpu 0 [ 595.889082][ T1137] CPU: 0 PID: 1137 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0 [ 595.889089][ T1137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 595.889094][ T1137] Call Trace: [ 595.889152][ T1137] dump_stack+0x188/0x20d [ 595.889171][ T1137] nmi_cpu_backtrace.cold+0x70/0xb1 [ 595.889209][ T1137] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 595.889223][ T1137] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 595.889258][ T1137] watchdog+0xa8c/0x1010 [ 595.889278][ T1137] ? reset_hung_task_detector+0x30/0x30 [ 595.889326][ T1137] kthread+0x388/0x470 [ 595.889340][ T1137] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 595.889356][ T1137] ret_from_fork+0x24/0x30 [ 595.889380][ T1137] Sending NMI from CPU 0 to CPUs 1: [ 595.890066][ C1] NMI backtrace for cpu 1 [ 595.890072][ C1] CPU: 1 PID: 7055 Comm: syz-executor740 Not tainted 5.7.0-rc1-syzkaller #0 [ 595.890078][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 595.890082][ C1] RIP: 0010:vga16fb_fillrect+0x9d3/0x1960 [ 595.890092][ C1] Code: 08 e8 41 cf af fd 31 ff 89 de 31 ed e8 a6 d0 af fd 85 db 4d 89 ec 74 22 e8 2a cf af fd 45 88 34 24 83 c5 01 89 df 49 83 c4 01 <89> ee e8 06 d0 af fd 39 eb 75 e3 4c 03 6c 24 08 e8 08 cf af fd 44 [ 595.890096][ C1] RSP: 0018:ffffc90000f874b8 EFLAGS: 00000286 [ 595.890104][ C1] RAX: ffff888089fb2040 RBX: 0000000000000050 RCX: ffffffff83c364ea [ 595.890109][ C1] RDX: 0000000000000000 RSI: ffffffff83c364d6 RDI: 0000000000000050 [ 595.890114][ C1] RBP: 000000000000000f R08: ffff888089fb2040 R09: ffffed104319aa94 [ 595.890119][ C1] R10: ffff888218cd549f R11: ffffed104319aa93 R12: ffff8880000a000f [ 595.890124][ C1] R13: ffff8880000a0000 R14: 0000000000000000 R15: 00000000ec01fb05 [ 595.890129][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000089a5840 [ 595.890134][ C1] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 595.890139][ C1] CR2: 00000000089ae0f4 CR3: 000000009f235000 CR4: 00000000001406e0 [ 595.890143][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 595.890148][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 595.890151][ C1] Call Trace: [ 595.890154][ C1] ? memcpy+0x39/0x60 [ 595.890158][ C1] bit_clear_margins+0x2d5/0x4a0 [ 595.890161][ C1] ? bit_bmove+0x210/0x210 [ 595.890165][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 595.890169][ C1] fbcon_clear_margins+0x1de/0x240 [ 595.890172][ C1] fbcon_switch+0xd21/0x1740 [ 595.890176][ C1] ? fbcon_set_def_font+0x370/0x370 [ 595.890179][ C1] ? fbcon_cursor+0x477/0x650 [ 595.890183][ C1] ? bit_clear+0x4e0/0x4e0 [ 595.890186][ C1] ? is_console_locked+0x5/0x10 [ 595.890190][ C1] ? fbcon_set_origin+0x26/0x50 [ 595.890193][ C1] redraw_screen+0x2ae/0x770 [ 595.890197][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 595.890200][ C1] ? respond_string+0x290/0x290 [ 595.890204][ C1] ? fbcon_set_palette+0x3b1/0x4a0 [ 595.890208][ C1] fbcon_modechanged+0x5c3/0x790 [ 595.890211][ C1] fbcon_update_vcs+0x3a/0x50 [ 595.890214][ C1] fb_set_var+0xad0/0xd40 [ 595.890218][ C1] ? fb_blank+0x190/0x190 [ 595.890221][ C1] ? mark_held_locks+0xe0/0xe0 [ 595.890225][ C1] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 595.890229][ C1] do_fb_ioctl+0x390/0x6e0 [ 595.890232][ C1] ? fb_mmap+0x550/0x550 [ 595.890235][ C1] ? lock_downgrade+0x840/0x840 [ 595.890239][ C1] ? quarantine_put+0x119/0x1c0 [ 595.890242][ C1] ? kfree+0x1eb/0x2b0 [ 595.890246][ C1] ? tomoyo_path_number_perm+0x411/0x4d0 [ 595.890250][ C1] ? lockdep_hardirqs_on+0x463/0x620 [ 595.890254][ C1] ? tomoyo_path_number_perm+0x238/0x4d0 [ 595.890258][ C1] ? tomoyo_execute_permission+0x470/0x470 [ 595.890261][ C1] ? trace_hardirqs_off+0x50/0x220 [ 595.890265][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 595.890269][ C1] ? do_vfs_ioctl+0x50c/0x12d0 [ 595.890272][ C1] fb_compat_ioctl+0x305/0xc50 [ 595.890276][ C1] ? fb_release+0x140/0x140 [ 595.890279][ C1] ? do_sys_open+0xc3/0x140 [ 595.890282][ C1] ? fb_release+0x140/0x140 [ 595.890286][ C1] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 595.890290][ C1] do_fast_syscall_32+0x270/0xe90 [ 595.890293][ C1] entry_SYSENTER_compat+0x70/0x7f [ 595.890454][ T1137] Kernel panic - not syncing: hung_task: blocked tasks [ 595.890467][ T1137] CPU: 0 PID: 1137 Comm: khungtaskd Not tainted 5.7.0-rc1-syzkaller #0 [ 595.890473][ T1137] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 595.890477][ T1137] Call Trace: [ 595.890494][ T1137] dump_stack+0x188/0x20d [ 595.890568][ T1137] panic+0x2e3/0x75c [ 595.890583][ T1137] ? add_taint.cold+0x16/0x16 [ 595.890598][ T1137] ? cpumask_next+0x3c/0x40 [ 595.890608][ T1137] ? printk_safe_flush+0xd9/0x120 [ 595.890618][ T1137] ? watchdog+0xa8c/0x1010 [ 595.890628][ T1137] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 595.890642][ T1137] watchdog+0xa9d/0x1010 [ 595.890658][ T1137] ? reset_hung_task_detector+0x30/0x30 [ 595.890669][ T1137] kthread+0x388/0x470 [ 595.890680][ T1137] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 595.890694][ T1137] ret_from_fork+0x24/0x30 [ 595.891640][ T1137] Kernel Offset: disabled [ 597.529583][ T1137] Rebooting in 86400 seconds..