[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.16' (ECDSA) to the list of known hosts.
executing program
executing program
executing program
executing program
executing program
executing program
syzkaller login: [ 596.537674][ T1135] INFO: task syz-executor213:7011 blocked for more than 143 seconds.
[ 596.537695][ T1135] Not tainted 5.6.0-rc7-syzkaller #0
[ 596.537700][ T1135] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 596.537707][ T1135] syz-executor213 D28392 7011 7010 0x20020004
[ 596.537729][ T1135] Call Trace:
[ 596.537883][ T1135] ? __schedule+0x934/0x1f90
[ 596.537909][ T1135] ? __sched_text_start+0x8/0x8
[ 596.537940][ T1135] schedule+0xd0/0x2a0
[ 596.537960][ T1135] schedule_preempt_disabled+0xf/0x20
[ 596.538012][ T1135] __mutex_lock+0x7ab/0x13c0
[ 596.538064][ T1135] ? fb_open+0xd3/0x430
[ 596.538088][ T1135] ? mutex_trylock+0x2c0/0x2c0
[ 596.538110][ T1135] ? __mutex_unlock_slowpath+0xe2/0x660
[ 596.538150][ T1135] ? chrdev_open+0xc4/0x5c0
[ 596.538197][ T1135] ? lock_downgrade+0x7f0/0x7f0
[ 596.538225][ T1135] ? fb_open+0xd3/0x430
[ 596.538235][ T1135] fb_open+0xd3/0x430
[ 596.538253][ T1135] ? get_fb_info.part.0+0x80/0x80
[ 596.538265][ T1135] chrdev_open+0x219/0x5c0
[ 596.538296][ T1135] ? rwlock_bug.part.0+0x90/0x90
[ 596.538311][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.538359][ T1135] do_dentry_open+0x4a2/0x1250
[ 596.538377][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.538448][ T1135] ? security_inode_permission+0xc4/0xf0
[ 596.538463][ T1135] ? chown_common+0x550/0x550
[ 596.538496][ T1135] ? inode_permission+0xab/0x500
[ 596.538522][ T1135] path_openat+0x122a/0x32b0
[ 596.538559][ T1135] ? path_mountpoint.isra.0+0x370/0x370
[ 596.538571][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.538591][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.538620][ T1135] do_filp_open+0x192/0x260
[ 596.538637][ T1135] ? may_open_dev+0xf0/0xf0
[ 596.538666][ T1135] ? do_raw_spin_lock+0x129/0x2e0
[ 596.538698][ T1135] ? _raw_spin_unlock+0x24/0x40
[ 596.538730][ T1135] ? __alloc_fd+0x46d/0x600
[ 596.538759][ T1135] do_sys_openat2+0x54c/0x740
[ 596.538782][ T1135] ? file_open_root+0x3d0/0x3d0
[ 596.538817][ T1135] do_sys_open+0xc3/0x140
[ 596.538837][ T1135] ? filp_open+0x70/0x70
[ 596.538883][ T1135] ? fpregs_mark_activate+0x320/0x320
[ 596.538935][ T1135] ? trace_hardirqs_off_caller+0x55/0x230
[ 596.538991][ T1135] do_fast_syscall_32+0x270/0xe8f
[ 596.539013][ T1135] entry_SYSENTER_compat+0x70/0x7f
[ 596.539051][ T1135] INFO: task syz-executor213:7012 blocked for more than 143 seconds.
[ 596.539058][ T1135] Not tainted 5.6.0-rc7-syzkaller #0
[ 596.539063][ T1135] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 596.539069][ T1135] syz-executor213 D28392 7012 7009 0x20020004
[ 596.539090][ T1135] Call Trace:
[ 596.539111][ T1135] ? __schedule+0x934/0x1f90
[ 596.539136][ T1135] ? __sched_text_start+0x8/0x8
[ 596.539167][ T1135] schedule+0xd0/0x2a0
[ 596.539185][ T1135] schedule_preempt_disabled+0xf/0x20
[ 596.539198][ T1135] __mutex_lock+0x7ab/0x13c0
[ 596.539216][ T1135] ? fb_open+0xd3/0x430
[ 596.539239][ T1135] ? mutex_trylock+0x2c0/0x2c0
[ 596.539261][ T1135] ? __mutex_unlock_slowpath+0xe2/0x660
[ 596.539274][ T1135] ? chrdev_open+0xc4/0x5c0
[ 596.539295][ T1135] ? lock_downgrade+0x7f0/0x7f0
[ 596.539322][ T1135] ? fb_open+0xd3/0x430
[ 596.539332][ T1135] fb_open+0xd3/0x430
[ 596.539349][ T1135] ? get_fb_info.part.0+0x80/0x80
[ 596.539362][ T1135] chrdev_open+0x219/0x5c0
[ 596.539376][ T1135] ? rwlock_bug.part.0+0x90/0x90
[ 596.539391][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.539421][ T1135] do_dentry_open+0x4a2/0x1250
[ 596.539438][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.539457][ T1135] ? security_inode_permission+0xc4/0xf0
[ 596.539471][ T1135] ? chown_common+0x550/0x550
[ 596.539484][ T1135] ? inode_permission+0xab/0x500
[ 596.539511][ T1135] path_openat+0x122a/0x32b0
[ 596.539547][ T1135] ? path_mountpoint.isra.0+0x370/0x370
[ 596.539558][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.539578][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.539607][ T1135] do_filp_open+0x192/0x260
[ 596.539624][ T1135] ? may_open_dev+0xf0/0xf0
[ 596.539653][ T1135] ? do_raw_spin_lock+0x129/0x2e0
[ 596.539684][ T1135] ? _raw_spin_unlock+0x24/0x40
[ 596.539697][ T1135] ? __alloc_fd+0x46d/0x600
[ 596.539726][ T1135] do_sys_openat2+0x54c/0x740
[ 596.539746][ T1135] ? file_open_root+0x3d0/0x3d0
[ 596.539781][ T1135] do_sys_open+0xc3/0x140
[ 596.539796][ T1135] ? filp_open+0x70/0x70
[ 596.539816][ T1135] ? fpregs_mark_activate+0x320/0x320
[ 596.539837][ T1135] ? trace_hardirqs_off_caller+0x55/0x230
[ 596.539862][ T1135] do_fast_syscall_32+0x270/0xe8f
[ 596.539884][ T1135] entry_SYSENTER_compat+0x70/0x7f
[ 596.539919][ T1135] INFO: task syz-executor213:7013 blocked for more than 143 seconds.
[ 596.539927][ T1135] Not tainted 5.6.0-rc7-syzkaller #0
[ 596.539932][ T1135] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 596.539937][ T1135] syz-executor213 D28392 7013 7007 0x20024004
[ 596.539956][ T1135] Call Trace:
[ 596.539976][ T1135] ? __schedule+0x934/0x1f90
[ 596.540002][ T1135] ? __sched_text_start+0x8/0x8
[ 596.540032][ T1135] schedule+0xd0/0x2a0
[ 596.540051][ T1135] schedule_preempt_disabled+0xf/0x20
[ 596.540064][ T1135] __mutex_lock+0x7ab/0x13c0
[ 596.540081][ T1135] ? fb_open+0xd3/0x430
[ 596.540104][ T1135] ? mutex_trylock+0x2c0/0x2c0
[ 596.540126][ T1135] ? __mutex_unlock_slowpath+0xe2/0x660
[ 596.540139][ T1135] ? chrdev_open+0xc4/0x5c0
[ 596.540161][ T1135] ? lock_downgrade+0x7f0/0x7f0
[ 596.540188][ T1135] ? fb_open+0xd3/0x430
[ 596.540199][ T1135] fb_open+0xd3/0x430
[ 596.540216][ T1135] ? get_fb_info.part.0+0x80/0x80
[ 596.540228][ T1135] chrdev_open+0x219/0x5c0
[ 596.540242][ T1135] ? rwlock_bug.part.0+0x90/0x90
[ 596.540257][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.540287][ T1135] do_dentry_open+0x4a2/0x1250
[ 596.540304][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.540323][ T1135] ? security_inode_permission+0xc4/0xf0
[ 596.540336][ T1135] ? chown_common+0x550/0x550
[ 596.540350][ T1135] ? inode_permission+0xab/0x500
[ 596.540376][ T1135] path_openat+0x122a/0x32b0
[ 596.540413][ T1135] ? path_mountpoint.isra.0+0x370/0x370
[ 596.540424][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.540444][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.540473][ T1135] do_filp_open+0x192/0x260
[ 596.540490][ T1135] ? may_open_dev+0xf0/0xf0
[ 596.540518][ T1135] ? do_raw_spin_lock+0x129/0x2e0
[ 596.540549][ T1135] ? _raw_spin_unlock+0x24/0x40
[ 596.540563][ T1135] ? __alloc_fd+0x46d/0x600
[ 596.540592][ T1135] do_sys_openat2+0x54c/0x740
[ 596.540611][ T1135] ? file_open_root+0x3d0/0x3d0
[ 596.540647][ T1135] do_sys_open+0xc3/0x140
[ 596.540661][ T1135] ? filp_open+0x70/0x70
[ 596.540681][ T1135] ? fpregs_mark_activate+0x320/0x320
[ 596.540698][ T1135] ? trace_hardirqs_off_caller+0x55/0x230
[ 596.540722][ T1135] do_fast_syscall_32+0x270/0xe8f
[ 596.540743][ T1135] entry_SYSENTER_compat+0x70/0x7f
[ 596.540779][ T1135] INFO: task syz-executor213:7014 blocked for more than 143 seconds.
[ 596.540786][ T1135] Not tainted 5.6.0-rc7-syzkaller #0
[ 596.540791][ T1135] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 596.540796][ T1135] syz-executor213 D28288 7014 7005 0x20020004
[ 596.540816][ T1135] Call Trace:
[ 596.540841][ T1135] ? __schedule+0x934/0x1f90
[ 596.540867][ T1135] ? __sched_text_start+0x8/0x8
[ 596.540897][ T1135] schedule+0xd0/0x2a0
[ 596.540916][ T1135] schedule_preempt_disabled+0xf/0x20
[ 596.540928][ T1135] __mutex_lock+0x7ab/0x13c0
[ 596.540946][ T1135] ? fb_open+0xd3/0x430
[ 596.540969][ T1135] ? mutex_trylock+0x2c0/0x2c0
[ 596.540991][ T1135] ? __mutex_unlock_slowpath+0xe2/0x660
[ 596.541003][ T1135] ? chrdev_open+0xc4/0x5c0
[ 596.541025][ T1135] ? lock_downgrade+0x7f0/0x7f0
[ 596.541052][ T1135] ? fb_open+0xd3/0x430
[ 596.541063][ T1135] fb_open+0xd3/0x430
[ 596.541079][ T1135] ? get_fb_info.part.0+0x80/0x80
[ 596.541092][ T1135] chrdev_open+0x219/0x5c0
[ 596.541106][ T1135] ? rwlock_bug.part.0+0x90/0x90
[ 596.541121][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.541151][ T1135] do_dentry_open+0x4a2/0x1250
[ 596.541168][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.541187][ T1135] ? security_inode_permission+0xc4/0xf0
[ 596.541201][ T1135] ? chown_common+0x550/0x550
[ 596.541214][ T1135] ? inode_permission+0xab/0x500
[ 596.541241][ T1135] path_openat+0x122a/0x32b0
[ 596.541277][ T1135] ? path_mountpoint.isra.0+0x370/0x370
[ 596.541288][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.541308][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.541337][ T1135] do_filp_open+0x192/0x260
[ 596.541354][ T1135] ? may_open_dev+0xf0/0xf0
[ 596.541383][ T1135] ? do_raw_spin_lock+0x129/0x2e0
[ 596.541414][ T1135] ? _raw_spin_unlock+0x24/0x40
[ 596.541427][ T1135] ? __alloc_fd+0x46d/0x600
[ 596.541456][ T1135] do_sys_openat2+0x54c/0x740
[ 596.541476][ T1135] ? file_open_root+0x3d0/0x3d0
[ 596.541511][ T1135] do_sys_open+0xc3/0x140
[ 596.541525][ T1135] ? filp_open+0x70/0x70
[ 596.541545][ T1135] ? fpregs_mark_activate+0x320/0x320
[ 596.541561][ T1135] ? trace_hardirqs_off_caller+0x55/0x230
[ 596.541586][ T1135] do_fast_syscall_32+0x270/0xe8f
[ 596.541607][ T1135] entry_SYSENTER_compat+0x70/0x7f
[ 596.541643][ T1135] INFO: task syz-executor213:7015 blocked for more than 143 seconds.
[ 596.541651][ T1135] Not tainted 5.6.0-rc7-syzkaller #0
[ 596.541656][ T1135] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 596.541661][ T1135] syz-executor213 D28392 7015 7008 0x20020004
[ 596.541679][ T1135] Call Trace:
[ 596.541700][ T1135] ? __schedule+0x934/0x1f90
[ 596.541725][ T1135] ? __sched_text_start+0x8/0x8
[ 596.541755][ T1135] schedule+0xd0/0x2a0
[ 596.541774][ T1135] schedule_preempt_disabled+0xf/0x20
[ 596.541787][ T1135] __mutex_lock+0x7ab/0x13c0
[ 596.541804][ T1135] ? fb_open+0xd3/0x430
[ 596.541827][ T1135] ? mutex_trylock+0x2c0/0x2c0
[ 596.541853][ T1135] ? __mutex_unlock_slowpath+0xe2/0x660
[ 596.541866][ T1135] ? chrdev_open+0xc4/0x5c0
[ 596.541887][ T1135] ? lock_downgrade+0x7f0/0x7f0
[ 596.541914][ T1135] ? fb_open+0xd3/0x430
[ 596.541925][ T1135] fb_open+0xd3/0x430
[ 596.541942][ T1135] ? get_fb_info.part.0+0x80/0x80
[ 596.541955][ T1135] chrdev_open+0x219/0x5c0
[ 596.541968][ T1135] ? rwlock_bug.part.0+0x90/0x90
[ 596.541983][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.542013][ T1135] do_dentry_open+0x4a2/0x1250
[ 596.542030][ T1135] ? cdev_put.part.0+0x50/0x50
[ 596.542049][ T1135] ? security_inode_permission+0xc4/0xf0
[ 596.542063][ T1135] ? chown_common+0x550/0x550
[ 596.542076][ T1135] ? inode_permission+0xab/0x500
[ 596.542103][ T1135] path_openat+0x122a/0x32b0
[ 596.542139][ T1135] ? path_mountpoint.isra.0+0x370/0x370
[ 596.542150][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.542170][ T1135] ? __lock_acquire+0x14bd/0x3ca0
[ 596.542199][ T1135] do_filp_open+0x192/0x260
[ 596.542216][ T1135] ? may_open_dev+0xf0/0xf0
[ 596.542245][ T1135] ? do_raw_spin_lock+0x129/0x2e0
[ 596.542276][ T1135] ? _raw_spin_unlock+0x24/0x40
[ 596.542289][ T1135] ? __alloc_fd+0x46d/0x600
[ 596.542318][ T1135] do_sys_openat2+0x54c/0x740
[ 596.542337][ T1135] ? file_open_root+0x3d0/0x3d0
[ 596.542373][ T1135] do_sys_open+0xc3/0x140
[ 596.542387][ T1135] ? filp_open+0x70/0x70
[ 596.542407][ T1135] ? fpregs_mark_activate+0x320/0x320
[ 596.542424][ T1135] ? trace_hardirqs_off_caller+0x55/0x230
[ 596.542448][ T1135] do_fast_syscall_32+0x270/0xe8f
[ 596.542469][ T1135] entry_SYSENTER_compat+0x70/0x7f
[ 596.542501][ T1135]
[ 596.542501][ T1135] Showing all locks held in the system:
[ 596.542514][ T1135] 1 lock held by khungtaskd/1135:
[ 596.542519][ T1135] #0: ffffffff897accc0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x260
[ 596.542569][ T1135] 1 lock held by in:imklog/6678:
[ 596.542573][ T1135] #0: ffff88809db53920 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100
[ 596.542604][ T1135] 2 locks held by syz-executor213/7006:
[ 596.542613][ T1135] 1 lock held by syz-executor213/7011:
[ 596.542617][ T1135] #0: ffff88821973f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430
[ 596.542643][ T1135] 1 lock held by syz-executor213/7012:
[ 596.542647][ T1135] #0: ffff88821973f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430
[ 596.542673][ T1135] 1 lock held by syz-executor213/7013:
[ 596.542677][ T1135] #0: ffff88821973f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430
[ 596.542703][ T1135] 1 lock held by syz-executor213/7014:
[ 596.542707][ T1135] #0: ffff88821973f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430
[ 596.542733][ T1135] 1 lock held by syz-executor213/7015:
[ 596.542737][ T1135] #0: ffff88821973f070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430
[ 596.542759][ T1135]
[ 596.542764][ T1135] =============================================
[ 596.542764][ T1135]
[ 596.542770][ T1135] NMI backtrace for cpu 0
[ 596.542783][ T1135] CPU: 0 PID: 1135 Comm: khungtaskd Not tainted 5.6.0-rc7-syzkaller #0
[ 596.542790][ T1135] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 596.542794][ T1135] Call Trace:
[ 596.542871][ T1135] dump_stack+0x188/0x20d
[ 596.542894][ T1135] nmi_cpu_backtrace.cold+0x70/0xb1
[ 596.542946][ T1135] ? lapic_can_unplug_cpu.cold+0x3b/0x3b
[ 596.542963][ T1135] nmi_trigger_cpumask_backtrace+0x231/0x27e
[ 596.543018][ T1135] watchdog+0xa8c/0x1010
[ 596.543042][ T1135] ? reset_hung_task_detector+0x30/0x30
[ 596.543077][ T1135] kthread+0x357/0x430
[ 596.543090][ T1135] ? kthread_mod_delayed_work+0x1a0/0x1a0
[ 596.543107][ T1135] ret_from_fork+0x24/0x30
[ 596.543141][ T1135] Sending NMI from CPU 0 to CPUs 1:
[ 596.543997][ C1] NMI backtrace for cpu 1
[ 596.544003][ C1] CPU: 1 PID: 7006 Comm: syz-executor213 Not tainted 5.6.0-rc7-syzkaller #0
[ 596.544008][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 596.544011][ C1] RIP: 0010:write_comp_data+0x1e/0x70
[ 596.544022][ C1] Code: 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 c0 1e 02 00 65 8b 05 08 f9 8f 7e a9 00 01 1f 00 75 51 41 8b 80 80 13 00 00 <83> f8 03 75 45 49 8b 80 88 13 00 00 45 8b 80 84 13 00 00 4c 8b 08
[ 596.544025][ C1] RSP: 0018:ffffc90001c46f88 EFLAGS: 00000246
[ 596.544032][ C1] RAX: 0000000000000000 RBX: 0000000000000050 RCX: ffffffff83b77faa
[ 596.544036][ C1] RDX: 0000000000000045 RSI: 0000000000000050 RDI: 0000000000000004
[ 596.544041][ C1] RBP: 0000000000000045 R08: ffff88809687e580 R09: ffffed1043180a54
[ 596.544045][ C1] R10: ffffed1043180a53 R11: ffff888218c0529f R12: ffff8880000a0045
[ 596.544050][ C1] R13: ffff8880000a0000 R14: 0000000000000000 R15: 00000000ea366dbf
[ 596.544055][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:0000000009ced840
[ 596.544058][ C1] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 596.544063][ C1] CR2: 0000000009cf60f4 CR3: 000000009742a000 CR4: 00000000001406e0
[ 596.544067][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 596.544072][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 596.544074][ C1] Call Trace:
[ 596.544077][ C1] vga16fb_fillrect+0x9da/0x1960
[ 596.544079][ C1] ? memcpy+0x35/0x50
[ 596.544082][ C1] bit_clear_margins+0x2d5/0x4a0
[ 596.544085][ C1] ? bit_bmove+0x210/0x210
[ 596.544088][ C1] ? vesafb_probe.cold+0x1162/0x1162
[ 596.544092][ C1] fbcon_clear_margins+0x1de/0x240
[ 596.544094][ C1] fbcon_switch+0xd1b/0x1740
[ 596.544098][ C1] ? fbcon_set_def_font+0x370/0x370
[ 596.544100][ C1] ? fbcon_cursor+0x477/0x650
[ 596.544103][ C1] ? bit_clear+0x4e0/0x4e0
[ 596.544106][ C1] ? is_console_locked+0x5/0x10
[ 596.544109][ C1] ? fbcon_set_origin+0x26/0x50
[ 596.544112][ C1] redraw_screen+0x2a8/0x770
[ 596.544115][ C1] ? vesafb_probe.cold+0x1162/0x1162
[ 596.544118][ C1] ? respond_string+0x290/0x290
[ 596.544121][ C1] ? fbcon_set_palette+0x3b1/0x4a0
[ 596.544124][ C1] fbcon_modechanged+0x5bd/0x780
[ 596.544127][ C1] fbcon_update_vcs+0x3a/0x50
[ 596.544130][ C1] fb_set_var+0xad0/0xd40
[ 596.544133][ C1] ? fb_blank+0x190/0x190
[ 596.544136][ C1] ? find_held_lock+0x2d/0x110
[ 596.544139][ C1] ? stack_depot_save+0x252/0x440
[ 596.544142][ C1] ? vga16fb_imageblit+0xc49/0x2210
[ 596.544145][ C1] ? bit_cursor+0xa62/0x1900
[ 596.544148][ C1] ? fb_videomode_to_var+0xf/0x610
[ 596.544151][ C1] fbcon_switch+0x520/0x1740
[ 596.544154][ C1] ? fbcon_set_def_font+0x370/0x370
[ 596.544156][ C1] ? fbcon_cursor+0x477/0x650
[ 596.544159][ C1] ? bit_clear+0x4e0/0x4e0
[ 596.544161][ C1] ? is_console_locked+0x5/0x10
[ 596.544163][ C1] ? fbcon_set_origin+0x26/0x50
[ 596.544166][ C1] redraw_screen+0x2a8/0x770
[ 596.544169][ C1] ? vesafb_probe.cold+0x1162/0x1162
[ 596.544171][ C1] ? respond_string+0x290/0x290
[ 596.544174][ C1] ? fbcon_set_palette+0x3b1/0x4a0
[ 596.544176][ C1] fbcon_modechanged+0x5bd/0x780
[ 596.544179][ C1] fbcon_update_vcs+0x3a/0x50
[ 596.544181][ C1] fb_set_var+0xad0/0xd40
[ 596.544183][ C1] ? fb_blank+0x190/0x190
[ 596.544186][ C1] ? do_fb_ioctl+0x348/0x7d0
[ 596.544188][ C1] ? lock_acquire+0x197/0x420
[ 596.544191][ C1] ? do_fb_ioctl+0x335/0x7d0
[ 596.544193][ C1] do_fb_ioctl+0x390/0x7d0
[ 596.544195][ C1] ? fb_mmap+0x550/0x550
[ 596.544198][ C1] ? lock_downgrade+0x7f0/0x7f0
[ 596.544201][ C1] ? quarantine_put+0x119/0x1c0
[ 596.544203][ C1] ? kfree+0x1eb/0x2b0
[ 596.544206][ C1] ? tomoyo_path_number_perm+0x411/0x4d0
[ 596.544208][ C1] ? lockdep_hardirqs_on+0x417/0x5d0
[ 596.544211][ C1] ? tomoyo_path_number_perm+0x238/0x4d0
[ 596.544214][ C1] ? tomoyo_execute_permission+0x470/0x470
[ 596.544217][ C1] ? trace_hardirqs_off+0x50/0x220
[ 596.544220][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70
[ 596.544222][ C1] ? do_vfs_ioctl+0x506/0x12c0
[ 596.544225][ C1] fb_compat_ioctl+0x305/0xc50
[ 596.544227][ C1] ? fb_release+0x140/0x140
[ 596.544229][ C1] ? do_sys_open+0xc3/0x140
[ 596.544232][ C1] ? fb_release+0x140/0x140
[ 596.544234][ C1] __ia32_compat_sys_ioctl+0x23d/0x2b0
[ 596.544237][ C1] do_fast_syscall_32+0x270/0xe8f
[ 596.544240][ C1] entry_SYSENTER_compat+0x70/0x7f
[ 596.544250][ T1135] Kernel panic - not syncing: hung_task: blocked tasks
[ 596.544261][ T1135] CPU: 0 PID: 1135 Comm: khungtaskd Not tainted 5.6.0-rc7-syzkaller #0
[ 596.544268][ T1135] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 596.544272][ T1135] Call Trace:
[ 596.544285][ T1135] dump_stack+0x188/0x20d
[ 596.544341][ T1135] panic+0x2e3/0x75c
[ 596.544353][ T1135] ? add_taint.cold+0x16/0x16
[ 596.544369][ T1135] ? cpumask_next+0x3c/0x40
[ 596.544381][ T1135] ? printk_safe_flush+0xd9/0x120
[ 596.544391][ T1135] ? watchdog+0xa8c/0x1010
[ 596.544403][ T1135] ? nmi_trigger_cpumask_backtrace+0x214/0x27e
[ 596.544419][ T1135] watchdog+0xa9d/0x1010
[ 596.544437][ T1135] ? reset_hung_task_detector+0x30/0x30
[ 596.544450][ T1135] kthread+0x357/0x430
[ 596.544460][ T1135] ? kthread_mod_delayed_work+0x1a0/0x1a0
[ 596.544473][ T1135] ret_from_fork+0x24/0x30
[ 596.546228][ T1135] Kernel Offset: disabled
[ 598.329219][ T1135] Rebooting in 86400 seconds..