Warning: Permanently added '10.128.0.23' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 411.719991][ T1126] INFO: task syz-executor154:7048 blocked for more than 143 seconds. [ 411.720009][ T1126] Not tainted 5.7.0-rc5-syzkaller #0 [ 411.720014][ T1126] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 411.720020][ T1126] syz-executor154 D28120 7048 7046 0x00000004 [ 411.720091][ T1126] Call Trace: [ 411.720280][ T1126] ? __schedule+0x937/0x1ff0 [ 411.720306][ T1126] ? __sched_text_start+0x8/0x8 [ 411.720332][ T1126] ? schedule+0xd0/0x2a0 [ 411.720348][ T1126] ? schedule_preempt_disabled+0xf/0x20 [ 411.720361][ T1126] ? __mutex_lock+0x7ab/0x13c0 [ 411.720401][ T1126] ? fb_open+0xd3/0x430 [ 411.720420][ T1126] ? mutex_trylock+0x2c0/0x2c0 [ 411.720438][ T1126] ? __mutex_unlock_slowpath+0xe2/0x660 [ 411.720477][ T1126] ? chrdev_open+0xc4/0x5c0 [ 411.720517][ T1126] ? lock_downgrade+0x840/0x840 [ 411.720539][ T1126] ? fb_open+0xd3/0x430 [ 411.720550][ T1126] ? fb_open+0xd3/0x430 [ 411.720566][ T1126] ? get_fb_info.part.0+0x80/0x80 [ 411.720579][ T1126] ? chrdev_open+0x219/0x5c0 [ 411.720595][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.720648][ T1126] ? security_file_open+0x84/0x410 [ 411.720687][ T1126] ? do_dentry_open+0x4ba/0x1290 [ 411.720703][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.720723][ T1126] ? security_inode_permission+0xc4/0xf0 [ 411.720736][ T1126] ? chown_common+0x550/0x550 [ 411.720774][ T1126] ? inode_permission+0xab/0x500 [ 411.720795][ T1126] ? path_openat+0x1e59/0x27d0 [ 411.720820][ T1126] ? path_lookupat.isra.0+0x530/0x530 [ 411.720839][ T1126] ? print_usage_bug+0x240/0x240 [ 411.720863][ T1126] ? do_filp_open+0x192/0x260 [ 411.720878][ T1126] ? may_open_dev+0xf0/0xf0 [ 411.720900][ T1126] ? do_raw_spin_lock+0x129/0x2e0 [ 411.720926][ T1126] ? _raw_spin_unlock+0x24/0x40 [ 411.720945][ T1126] ? __alloc_fd+0x46d/0x600 [ 411.720968][ T1126] ? do_sys_openat2+0x585/0x7d0 [ 411.720985][ T1126] ? file_open_root+0x400/0x400 [ 411.721058][ T1126] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 411.721077][ T1126] ? do_sys_open+0xc3/0x140 [ 411.721091][ T1126] ? filp_open+0x70/0x70 [ 411.721133][ T1126] ? fpregs_mark_activate+0x320/0x320 [ 411.721182][ T1126] ? trace_hardirqs_off_caller+0x55/0x230 [ 411.721214][ T1126] ? do_syscall_64+0xf6/0x7d0 [ 411.721233][ T1126] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 411.721261][ T1126] INFO: task syz-executor154:7049 blocked for more than 143 seconds. [ 411.721270][ T1126] Not tainted 5.7.0-rc5-syzkaller #0 [ 411.721275][ T1126] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 411.721282][ T1126] syz-executor154 D28120 7049 7045 0x00000004 [ 411.721309][ T1126] Call Trace: [ 411.721330][ T1126] ? __schedule+0x937/0x1ff0 [ 411.721353][ T1126] ? __sched_text_start+0x8/0x8 [ 411.721380][ T1126] ? schedule+0xd0/0x2a0 [ 411.721395][ T1126] ? schedule_preempt_disabled+0xf/0x20 [ 411.721407][ T1126] ? __mutex_lock+0x7ab/0x13c0 [ 411.721423][ T1126] ? fb_open+0xd3/0x430 [ 411.721441][ T1126] ? mutex_trylock+0x2c0/0x2c0 [ 411.721460][ T1126] ? __mutex_unlock_slowpath+0xe2/0x660 [ 411.721473][ T1126] ? chrdev_open+0xc4/0x5c0 [ 411.721493][ T1126] ? lock_downgrade+0x840/0x840 [ 411.721515][ T1126] ? fb_open+0xd3/0x430 [ 411.721527][ T1126] ? fb_open+0xd3/0x430 [ 411.721542][ T1126] ? get_fb_info.part.0+0x80/0x80 [ 411.721555][ T1126] ? chrdev_open+0x219/0x5c0 [ 411.721571][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.721588][ T1126] ? security_file_open+0x84/0x410 [ 411.721606][ T1126] ? do_dentry_open+0x4ba/0x1290 [ 411.721621][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.721640][ T1126] ? security_inode_permission+0xc4/0xf0 [ 411.721654][ T1126] ? chown_common+0x550/0x550 [ 411.721671][ T1126] ? inode_permission+0xab/0x500 [ 411.721692][ T1126] ? path_openat+0x1e59/0x27d0 [ 411.721716][ T1126] ? path_lookupat.isra.0+0x530/0x530 [ 411.721735][ T1126] ? lock_acquire+0x1f2/0x8f0 [ 411.721758][ T1126] ? do_filp_open+0x192/0x260 [ 411.721773][ T1126] ? may_open_dev+0xf0/0xf0 [ 411.721795][ T1126] ? do_raw_spin_lock+0x129/0x2e0 [ 411.721820][ T1126] ? _raw_spin_unlock+0x24/0x40 [ 411.721834][ T1126] ? __alloc_fd+0x46d/0x600 [ 411.721857][ T1126] ? do_sys_openat2+0x585/0x7d0 [ 411.721874][ T1126] ? file_open_root+0x400/0x400 [ 411.721896][ T1126] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 411.721915][ T1126] ? do_sys_open+0xc3/0x140 [ 411.721929][ T1126] ? filp_open+0x70/0x70 [ 411.721947][ T1126] ? fpregs_mark_activate+0x320/0x320 [ 411.721963][ T1126] ? trace_hardirqs_off_caller+0x55/0x230 [ 411.721986][ T1126] ? do_syscall_64+0xf6/0x7d0 [ 411.722005][ T1126] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 411.722032][ T1126] INFO: task syz-executor154:7050 blocked for more than 143 seconds. [ 411.722045][ T1126] Not tainted 5.7.0-rc5-syzkaller #0 [ 411.722051][ T1126] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 411.722057][ T1126] syz-executor154 D27856 7050 7042 0x00000004 [ 411.722077][ T1126] Call Trace: [ 411.722097][ T1126] ? __schedule+0x937/0x1ff0 [ 411.722120][ T1126] ? __sched_text_start+0x8/0x8 [ 411.722146][ T1126] ? schedule+0xd0/0x2a0 [ 411.722162][ T1126] ? schedule_preempt_disabled+0xf/0x20 [ 411.722174][ T1126] ? __mutex_lock+0x7ab/0x13c0 [ 411.722190][ T1126] ? fb_open+0xd3/0x430 [ 411.722208][ T1126] ? mutex_trylock+0x2c0/0x2c0 [ 411.722227][ T1126] ? __mutex_unlock_slowpath+0xe2/0x660 [ 411.722240][ T1126] ? chrdev_open+0xc4/0x5c0 [ 411.722259][ T1126] ? lock_downgrade+0x840/0x840 [ 411.722282][ T1126] ? fb_open+0xd3/0x430 [ 411.722294][ T1126] ? fb_open+0xd3/0x430 [ 411.722310][ T1126] ? get_fb_info.part.0+0x80/0x80 [ 411.722323][ T1126] ? chrdev_open+0x219/0x5c0 [ 411.722339][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.722356][ T1126] ? security_file_open+0x84/0x410 [ 411.722374][ T1126] ? do_dentry_open+0x4ba/0x1290 [ 411.722403][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.722422][ T1126] ? security_inode_permission+0xc4/0xf0 [ 411.722436][ T1126] ? chown_common+0x550/0x550 [ 411.722452][ T1126] ? inode_permission+0xab/0x500 [ 411.722473][ T1126] ? path_openat+0x1e59/0x27d0 [ 411.722498][ T1126] ? path_lookupat.isra.0+0x530/0x530 [ 411.722516][ T1126] ? print_usage_bug+0x240/0x240 [ 411.722540][ T1126] ? do_filp_open+0x192/0x260 [ 411.722555][ T1126] ? may_open_dev+0xf0/0xf0 [ 411.722577][ T1126] ? do_raw_spin_lock+0x129/0x2e0 [ 411.722603][ T1126] ? _raw_spin_unlock+0x24/0x40 [ 411.722617][ T1126] ? __alloc_fd+0x46d/0x600 [ 411.722639][ T1126] ? do_sys_openat2+0x585/0x7d0 [ 411.722656][ T1126] ? file_open_root+0x400/0x400 [ 411.722679][ T1126] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 411.722697][ T1126] ? do_sys_open+0xc3/0x140 [ 411.722711][ T1126] ? filp_open+0x70/0x70 [ 411.722730][ T1126] ? fpregs_mark_activate+0x320/0x320 [ 411.722745][ T1126] ? trace_hardirqs_off_caller+0x55/0x230 [ 411.722768][ T1126] ? do_syscall_64+0xf6/0x7d0 [ 411.722787][ T1126] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 411.722814][ T1126] INFO: task syz-executor154:7051 blocked for more than 143 seconds. [ 411.722823][ T1126] Not tainted 5.7.0-rc5-syzkaller #0 [ 411.722828][ T1126] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 411.722834][ T1126] syz-executor154 D28120 7051 7047 0x00000004 [ 411.722856][ T1126] Call Trace: [ 411.722875][ T1126] ? __schedule+0x937/0x1ff0 [ 411.722899][ T1126] ? __sched_text_start+0x8/0x8 [ 411.722925][ T1126] ? schedule+0xd0/0x2a0 [ 411.722941][ T1126] ? schedule_preempt_disabled+0xf/0x20 [ 411.722953][ T1126] ? __mutex_lock+0x7ab/0x13c0 [ 411.722969][ T1126] ? fb_open+0xd3/0x430 [ 411.722987][ T1126] ? mutex_trylock+0x2c0/0x2c0 [ 411.723005][ T1126] ? __mutex_unlock_slowpath+0xe2/0x660 [ 411.723018][ T1126] ? chrdev_open+0xc4/0x5c0 [ 411.723043][ T1126] ? lock_downgrade+0x840/0x840 [ 411.723065][ T1126] ? fb_open+0xd3/0x430 [ 411.723077][ T1126] ? fb_open+0xd3/0x430 [ 411.723093][ T1126] ? get_fb_info.part.0+0x80/0x80 [ 411.723106][ T1126] ? chrdev_open+0x219/0x5c0 [ 411.723122][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.723138][ T1126] ? security_file_open+0x84/0x410 [ 411.723156][ T1126] ? do_dentry_open+0x4ba/0x1290 [ 411.723172][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.723191][ T1126] ? security_inode_permission+0xc4/0xf0 [ 411.723204][ T1126] ? chown_common+0x550/0x550 [ 411.723221][ T1126] ? inode_permission+0xab/0x500 [ 411.723242][ T1126] ? path_openat+0x1e59/0x27d0 [ 411.723266][ T1126] ? path_lookupat.isra.0+0x530/0x530 [ 411.723285][ T1126] ? lock_acquire+0x1f2/0x8f0 [ 411.723309][ T1126] ? do_filp_open+0x192/0x260 [ 411.723323][ T1126] ? may_open_dev+0xf0/0xf0 [ 411.723346][ T1126] ? do_raw_spin_lock+0x129/0x2e0 [ 411.723371][ T1126] ? _raw_spin_unlock+0x24/0x40 [ 411.723385][ T1126] ? __alloc_fd+0x46d/0x600 [ 411.723408][ T1126] ? do_sys_openat2+0x585/0x7d0 [ 411.723425][ T1126] ? file_open_root+0x400/0x400 [ 411.723448][ T1126] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 411.723466][ T1126] ? do_sys_open+0xc3/0x140 [ 411.723480][ T1126] ? filp_open+0x70/0x70 [ 411.723499][ T1126] ? fpregs_mark_activate+0x320/0x320 [ 411.723514][ T1126] ? trace_hardirqs_off_caller+0x55/0x230 [ 411.723537][ T1126] ? do_syscall_64+0xf6/0x7d0 [ 411.723556][ T1126] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 411.723583][ T1126] INFO: task syz-executor154:7052 blocked for more than 143 seconds. [ 411.723591][ T1126] Not tainted 5.7.0-rc5-syzkaller #0 [ 411.723596][ T1126] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 411.723602][ T1126] syz-executor154 D28120 7052 7044 0x00000004 [ 411.723623][ T1126] Call Trace: [ 411.723643][ T1126] ? __schedule+0x937/0x1ff0 [ 411.723666][ T1126] ? __sched_text_start+0x8/0x8 [ 411.723693][ T1126] ? schedule+0xd0/0x2a0 [ 411.723708][ T1126] ? schedule_preempt_disabled+0xf/0x20 [ 411.723720][ T1126] ? __mutex_lock+0x7ab/0x13c0 [ 411.723736][ T1126] ? fb_open+0xd3/0x430 [ 411.723754][ T1126] ? mutex_trylock+0x2c0/0x2c0 [ 411.723773][ T1126] ? __mutex_unlock_slowpath+0xe2/0x660 [ 411.723786][ T1126] ? chrdev_open+0xc4/0x5c0 [ 411.723805][ T1126] ? lock_downgrade+0x840/0x840 [ 411.723827][ T1126] ? fb_open+0xd3/0x430 [ 411.723839][ T1126] ? fb_open+0xd3/0x430 [ 411.723856][ T1126] ? get_fb_info.part.0+0x80/0x80 [ 411.723869][ T1126] ? chrdev_open+0x219/0x5c0 [ 411.723884][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.723902][ T1126] ? security_file_open+0x84/0x410 [ 411.723919][ T1126] ? do_dentry_open+0x4ba/0x1290 [ 411.723935][ T1126] ? cdev_put.part.0+0x50/0x50 [ 411.723954][ T1126] ? security_inode_permission+0xc4/0xf0 [ 411.723967][ T1126] ? chown_common+0x550/0x550 [ 411.723984][ T1126] ? inode_permission+0xab/0x500 [ 411.724005][ T1126] ? path_openat+0x1e59/0x27d0 [ 411.724029][ T1126] ? path_lookupat.isra.0+0x530/0x530 [ 411.724053][ T1126] ? lock_acquire+0x1f2/0x8f0 [ 411.724077][ T1126] ? do_filp_open+0x192/0x260 [ 411.724092][ T1126] ? may_open_dev+0xf0/0xf0 [ 411.724114][ T1126] ? do_raw_spin_lock+0x129/0x2e0 [ 411.724139][ T1126] ? _raw_spin_unlock+0x24/0x40 [ 411.724153][ T1126] ? __alloc_fd+0x46d/0x600 [ 411.724176][ T1126] ? do_sys_openat2+0x585/0x7d0 [ 411.724193][ T1126] ? file_open_root+0x400/0x400 [ 411.724215][ T1126] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 411.724234][ T1126] ? do_sys_open+0xc3/0x140 [ 411.724247][ T1126] ? filp_open+0x70/0x70 [ 411.724266][ T1126] ? fpregs_mark_activate+0x320/0x320 [ 411.724281][ T1126] ? trace_hardirqs_off_caller+0x55/0x230 [ 411.724305][ T1126] ? do_syscall_64+0xf6/0x7d0 [ 411.724324][ T1126] ? entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 411.724346][ T1126] [ 411.724346][ T1126] Showing all locks held in the system: [ 411.724361][ T1126] 1 lock held by khungtaskd/1126: [ 411.724366][ T1126] #0: ffffffff899bea80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 411.724432][ T1126] 1 lock held by in:imklog/6728: [ 411.724437][ T1126] #0: ffff8880a4c81d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 411.724473][ T1126] 2 locks held by syz-executor154/7043: [ 411.724482][ T1126] 1 lock held by syz-executor154/7048: [ 411.724487][ T1126] #0: ffff888219056078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 411.724518][ T1126] 1 lock held by syz-executor154/7049: [ 411.724522][ T1126] #0: ffff888219056078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 411.724553][ T1126] 1 lock held by syz-executor154/7050: [ 411.724558][ T1126] #0: ffff888219056078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 411.724589][ T1126] 1 lock held by syz-executor154/7051: [ 411.724594][ T1126] #0: ffff888219056078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 411.724625][ T1126] 1 lock held by syz-executor154/7052: [ 411.724630][ T1126] #0: ffff888219056078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 411.724656][ T1126] [ 411.724661][ T1126] ============================================= [ 411.724661][ T1126] [ 411.724668][ T1126] NMI backtrace for cpu 1 [ 411.724682][ T1126] CPU: 1 PID: 1126 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #0 [ 411.724690][ T1126] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 411.724695][ T1126] Call Trace: [ 411.724756][ T1126] dump_stack+0x188/0x20d [ 411.724775][ T1126] nmi_cpu_backtrace.cold+0x70/0xb1 [ 411.724797][ T1126] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 411.724812][ T1126] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 411.724843][ T1126] watchdog+0xa8c/0x1010 [ 411.724862][ T1126] ? reset_hung_task_detector+0x30/0x30 [ 411.724953][ T1126] kthread+0x388/0x470 [ 411.724968][ T1126] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 411.724984][ T1126] ret_from_fork+0x24/0x30 [ 411.725008][ T1126] Sending NMI from CPU 1 to CPUs 0: [ 411.725695][ C0] NMI backtrace for cpu 0 [ 411.725701][ C0] CPU: 0 PID: 7043 Comm: syz-executor154 Not tainted 5.7.0-rc5-syzkaller #0 [ 411.725706][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 411.725710][ C0] RIP: 0010:write_comp_data+0x0/0x70 [ 411.725719][ C0] Code: 20 48 8b 88 e0 13 00 00 8b 80 dc 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 <65> 4c 8b 04 25 00 1f 02 00 65 8b 05 f8 ea 8e 7e a9 00 01 1f 00 75 [ 411.725723][ C0] RSP: 0018:ffffc90001717598 EFLAGS: 00000282 [ 411.725730][ C0] RAX: ffff88809bc24280 RBX: 0000000000000050 RCX: ffffffff83c3496a [ 411.725734][ C0] RDX: 0000000000000008 RSI: 0000000000000050 RDI: 0000000000000004 [ 411.725738][ C0] RBP: 0000000000000008 R08: ffff88809bc24280 R09: ffffed104320a63c [ 411.725743][ C0] R10: ffff8882190531df R11: ffffed104320a63b R12: ffff8880000a0008 [ 411.725747][ C0] R13: ffff8880000a0000 R14: 0000000000000000 R15: 00000000e7b97e38 [ 411.725752][ C0] FS: 0000000000db1880(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 411.725756][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 411.725760][ C0] CR2: 00007fe2180b2b04 CR3: 0000000097b38000 CR4: 00000000001406f0 [ 411.725765][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 411.725769][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 411.725772][ C0] Call Trace: [ 411.725775][ C0] vga16fb_fillrect+0x9da/0x1960 [ 411.725777][ C0] ? memcpy+0x39/0x60 [ 411.725781][ C0] bit_clear_margins+0x2d5/0x4a0 [ 411.725783][ C0] ? bit_bmove+0x210/0x210 [ 411.725787][ C0] ? vesafb_probe.cold+0x1162/0x1162 [ 411.725790][ C0] fbcon_clear_margins+0x1de/0x240 [ 411.725793][ C0] fbcon_switch+0xcde/0x16f0 [ 411.725796][ C0] ? fbcon_set_def_font+0x370/0x370 [ 411.725799][ C0] ? fbcon_cursor+0x477/0x650 [ 411.725802][ C0] ? bit_clear+0x4e0/0x4e0 [ 411.725805][ C0] ? is_console_locked+0x5/0x10 [ 411.725808][ C0] ? fbcon_set_origin+0x26/0x50 [ 411.725811][ C0] redraw_screen+0x2ae/0x770 [ 411.725814][ C0] ? vesafb_probe.cold+0x1162/0x1162 [ 411.725817][ C0] ? respond_string+0x290/0x290 [ 411.725821][ C0] ? fbcon_set_palette+0x3b1/0x4a0 [ 411.725824][ C0] fbcon_modechanged+0x581/0x720 [ 411.725827][ C0] fbcon_update_vcs+0x3a/0x50 [ 411.725830][ C0] fb_set_var+0xad0/0xd40 [ 411.725833][ C0] ? fb_blank+0x190/0x190 [ 411.725835][ C0] ? mark_held_locks+0xe0/0xe0 [ 411.725839][ C0] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 411.725842][ C0] do_fb_ioctl+0x390/0x6e0 [ 411.725845][ C0] ? fb_mmap+0x550/0x550 [ 411.725848][ C0] ? tomoyo_execute_permission+0x470/0x470 [ 411.725852][ C0] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 411.725855][ C0] ? do_vfs_ioctl+0x50c/0x1360 [ 411.725858][ C0] ? up_read+0x1ab/0x750 [ 411.725861][ C0] ? down_read_nested+0x420/0x420 [ 411.725863][ C0] fb_ioctl+0xdd/0x130 [ 411.725866][ C0] ? do_fb_ioctl+0x6e0/0x6e0 [ 411.725869][ C0] ksys_ioctl+0x11a/0x180 [ 411.725872][ C0] __x64_sys_ioctl+0x6f/0xb0 [ 411.725875][ C0] ? lockdep_hardirqs_on+0x463/0x620 [ 411.725878][ C0] do_syscall_64+0xf6/0x7d0 [ 411.725882][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 411.725884][ C0] RIP: 0033:0x441469 [ 411.725894][ C0] 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 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 411.725897][ C0] RSP: 002b:00007ffc91f05a38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 411.725905][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441469 [ 411.725909][ C0] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 411.725914][ C0] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 411.725918][ C0] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021e0 [ 411.725923][ C0] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 411.726026][ T1126] Kernel panic - not syncing: hung_task: blocked tasks [ 411.726037][ T1126] CPU: 1 PID: 1126 Comm: khungtaskd Not tainted 5.7.0-rc5-syzkaller #0 [ 411.726049][ T1126] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 411.726053][ T1126] Call Trace: [ 411.726066][ T1126] dump_stack+0x188/0x20d [ 411.726105][ T1126] panic+0x2e3/0x75c [ 411.726118][ T1126] ? add_taint.cold+0x16/0x16 [ 411.726133][ T1126] ? cpumask_next+0x3c/0x40 [ 411.726144][ T1126] ? printk_safe_flush+0xd9/0x120 [ 411.726153][ T1126] ? watchdog+0xa8c/0x1010 [ 411.726164][ T1126] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 411.726177][ T1126] watchdog+0xa9d/0x1010 [ 411.726192][ T1126] ? reset_hung_task_detector+0x30/0x30 [ 411.726205][ T1126] kthread+0x388/0x470 [ 411.726216][ T1126] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 411.726230][ T1126] ret_from_fork+0x24/0x30 [ 411.727883][ T1126] Kernel Offset: disabled [ 413.491803][ T1126] Rebooting in 86400 seconds..