Warning: Permanently added '10.128.0.171' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 637.152371][ T1139] INFO: task syz-executor327:7039 blocked for more than 143 seconds. [ 637.152393][ T1139] Not tainted 5.6.0-syzkaller #0 [ 637.152399][ T1139] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.152406][ T1139] syz-executor327 D28400 7039 7031 0x00004004 [ 637.152430][ T1139] Call Trace: [ 637.152565][ T1139] ? __schedule+0x937/0x1ff0 [ 637.152590][ T1139] ? firmware_map_remove+0x19c/0x19c [ 637.152616][ T1139] schedule+0xd0/0x2a0 [ 637.152636][ T1139] schedule_preempt_disabled+0xf/0x20 [ 637.152697][ T1139] __mutex_lock+0x7ab/0x13c0 [ 637.152744][ T1139] ? fb_open+0xd3/0x430 [ 637.152766][ T1139] ? mutex_trylock+0x2c0/0x2c0 [ 637.152787][ T1139] ? __mutex_unlock_slowpath+0xe2/0x660 [ 637.152835][ T1139] ? chrdev_open+0xc4/0x5c0 [ 637.152932][ T1139] ? lock_downgrade+0x840/0x840 [ 637.152955][ T1139] ? fb_open+0xd3/0x430 [ 637.152968][ T1139] fb_open+0xd3/0x430 [ 637.152985][ T1139] ? get_fb_info.part.0+0x80/0x80 [ 637.152999][ T1139] chrdev_open+0x219/0x5c0 [ 637.153015][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.153094][ T1139] ? security_file_open+0x84/0x410 [ 637.153139][ T1139] do_dentry_open+0x4ba/0x1290 [ 637.153156][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.153175][ T1139] ? security_inode_permission+0xc4/0xf0 [ 637.153188][ T1139] ? chown_common+0x550/0x550 [ 637.153232][ T1139] ? inode_permission+0xab/0x500 [ 637.153254][ T1139] path_openat+0x1e59/0x27d0 [ 637.153278][ T1139] ? path_lookupat.isra.0+0x530/0x530 [ 637.153296][ T1139] ? print_usage_bug+0x240/0x240 [ 637.153320][ T1139] do_filp_open+0x192/0x260 [ 637.153335][ T1139] ? may_open_dev+0xf0/0xf0 [ 637.153367][ T1139] ? do_raw_spin_lock+0x129/0x2e0 [ 637.153392][ T1139] ? _raw_spin_unlock+0x24/0x40 [ 637.153431][ T1139] ? __alloc_fd+0x46d/0x600 [ 637.153454][ T1139] do_sys_openat2+0x585/0x7d0 [ 637.153471][ T1139] ? file_open_root+0x400/0x400 [ 637.153527][ T1139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 637.153546][ T1139] do_sys_open+0xc3/0x140 [ 637.153560][ T1139] ? filp_open+0x70/0x70 [ 637.153618][ T1139] ? fpregs_mark_activate+0x320/0x320 [ 637.153653][ T1139] ? trace_hardirqs_off_caller+0x55/0x230 [ 637.153694][ T1139] do_syscall_64+0xf6/0x7d0 [ 637.153714][ T1139] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 637.153727][ T1139] RIP: 0033:0x446909 [ 637.153749][ T1139] Code: Bad RIP value. [ 637.153757][ T1139] RSP: 002b:00007fdf0bfaddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 637.153771][ T1139] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446909 [ 637.153780][ T1139] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 637.153789][ T1139] RBP: 00000000006dbc20 R08: 00007fdf0bfae700 R09: 0000000000000000 [ 637.153798][ T1139] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.153807][ T1139] R13: 00007ffdf270c61f R14: 00007fdf0bfae9c0 R15: 000000000000002d [ 637.153836][ T1139] INFO: task syz-executor327:7041 blocked for more than 143 seconds. [ 637.153844][ T1139] Not tainted 5.6.0-syzkaller #0 [ 637.153850][ T1139] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.153856][ T1139] syz-executor327 D28224 7041 7032 0x00000004 [ 637.153877][ T1139] Call Trace: [ 637.153898][ T1139] ? __schedule+0x937/0x1ff0 [ 637.153921][ T1139] ? firmware_map_remove+0x19c/0x19c [ 637.153946][ T1139] schedule+0xd0/0x2a0 [ 637.153965][ T1139] schedule_preempt_disabled+0xf/0x20 [ 637.153980][ T1139] __mutex_lock+0x7ab/0x13c0 [ 637.153997][ T1139] ? fb_open+0xd3/0x430 [ 637.154018][ T1139] ? mutex_trylock+0x2c0/0x2c0 [ 637.154039][ T1139] ? __mutex_unlock_slowpath+0xe2/0x660 [ 637.154052][ T1139] ? chrdev_open+0xc4/0x5c0 [ 637.154072][ T1139] ? lock_downgrade+0x840/0x840 [ 637.154094][ T1139] ? fb_open+0xd3/0x430 [ 637.154106][ T1139] fb_open+0xd3/0x430 [ 637.154123][ T1139] ? get_fb_info.part.0+0x80/0x80 [ 637.154136][ T1139] chrdev_open+0x219/0x5c0 [ 637.154151][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.154172][ T1139] ? security_file_open+0x84/0x410 [ 637.154189][ T1139] do_dentry_open+0x4ba/0x1290 [ 637.154205][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.154224][ T1139] ? security_inode_permission+0xc4/0xf0 [ 637.154237][ T1139] ? chown_common+0x550/0x550 [ 637.154254][ T1139] ? inode_permission+0xab/0x500 [ 637.154275][ T1139] path_openat+0x1e59/0x27d0 [ 637.154299][ T1139] ? path_lookupat.isra.0+0x530/0x530 [ 637.154317][ T1139] ? print_usage_bug+0x240/0x240 [ 637.154348][ T1139] do_filp_open+0x192/0x260 [ 637.154363][ T1139] ? may_open_dev+0xf0/0xf0 [ 637.154389][ T1139] ? do_raw_spin_lock+0x129/0x2e0 [ 637.154414][ T1139] ? _raw_spin_unlock+0x24/0x40 [ 637.154427][ T1139] ? __alloc_fd+0x46d/0x600 [ 637.154450][ T1139] do_sys_openat2+0x585/0x7d0 [ 637.154467][ T1139] ? file_open_root+0x400/0x400 [ 637.154489][ T1139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 637.154508][ T1139] do_sys_open+0xc3/0x140 [ 637.154522][ T1139] ? filp_open+0x70/0x70 [ 637.154540][ T1139] ? fpregs_mark_activate+0x320/0x320 [ 637.154555][ T1139] ? trace_hardirqs_off_caller+0x55/0x230 [ 637.154579][ T1139] do_syscall_64+0xf6/0x7d0 [ 637.154597][ T1139] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 637.154607][ T1139] RIP: 0033:0x446909 [ 637.154620][ T1139] Code: Bad RIP value. [ 637.154628][ T1139] RSP: 002b:00007fdf0bfaddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 637.154642][ T1139] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446909 [ 637.154651][ T1139] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 637.154659][ T1139] RBP: 00000000006dbc20 R08: 00007fdf0bfae700 R09: 0000000000000000 [ 637.154668][ T1139] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.154677][ T1139] R13: 00007ffdf270c61f R14: 00007fdf0bfae9c0 R15: 000000000000002d [ 637.154704][ T1139] INFO: task syz-executor327:7042 blocked for more than 143 seconds. [ 637.154712][ T1139] Not tainted 5.6.0-syzkaller #0 [ 637.154718][ T1139] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.154724][ T1139] syz-executor327 D27856 7042 7030 0x00004004 [ 637.154742][ T1139] Call Trace: [ 637.154762][ T1139] ? __schedule+0x937/0x1ff0 [ 637.154785][ T1139] ? firmware_map_remove+0x19c/0x19c [ 637.154810][ T1139] schedule+0xd0/0x2a0 [ 637.154829][ T1139] schedule_preempt_disabled+0xf/0x20 [ 637.154843][ T1139] __mutex_lock+0x7ab/0x13c0 [ 637.154859][ T1139] ? fb_open+0xd3/0x430 [ 637.154880][ T1139] ? mutex_trylock+0x2c0/0x2c0 [ 637.154901][ T1139] ? __mutex_unlock_slowpath+0xe2/0x660 [ 637.154914][ T1139] ? chrdev_open+0xc4/0x5c0 [ 637.154934][ T1139] ? lock_downgrade+0x840/0x840 [ 637.154956][ T1139] ? fb_open+0xd3/0x430 [ 637.154968][ T1139] fb_open+0xd3/0x430 [ 637.154985][ T1139] ? get_fb_info.part.0+0x80/0x80 [ 637.154998][ T1139] chrdev_open+0x219/0x5c0 [ 637.155014][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.155034][ T1139] ? security_file_open+0x84/0x410 [ 637.155052][ T1139] do_dentry_open+0x4ba/0x1290 [ 637.155068][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.155086][ T1139] ? security_inode_permission+0xc4/0xf0 [ 637.155100][ T1139] ? chown_common+0x550/0x550 [ 637.155116][ T1139] ? inode_permission+0xab/0x500 [ 637.155137][ T1139] path_openat+0x1e59/0x27d0 [ 637.155161][ T1139] ? path_lookupat.isra.0+0x530/0x530 [ 637.155180][ T1139] ? print_usage_bug+0x240/0x240 [ 637.155214][ T1139] do_filp_open+0x192/0x260 [ 637.155229][ T1139] ? may_open_dev+0xf0/0xf0 [ 637.155255][ T1139] ? do_raw_spin_lock+0x129/0x2e0 [ 637.155280][ T1139] ? _raw_spin_unlock+0x24/0x40 [ 637.155293][ T1139] ? __alloc_fd+0x46d/0x600 [ 637.155316][ T1139] do_sys_openat2+0x585/0x7d0 [ 637.155333][ T1139] ? file_open_root+0x400/0x400 [ 637.155360][ T1139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 637.155378][ T1139] do_sys_open+0xc3/0x140 [ 637.155392][ T1139] ? filp_open+0x70/0x70 [ 637.155410][ T1139] ? fpregs_mark_activate+0x320/0x320 [ 637.155426][ T1139] ? trace_hardirqs_off_caller+0x55/0x230 [ 637.155449][ T1139] do_syscall_64+0xf6/0x7d0 [ 637.155467][ T1139] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 637.155477][ T1139] RIP: 0033:0x446909 [ 637.155491][ T1139] Code: Bad RIP value. [ 637.155499][ T1139] RSP: 002b:00007fdf0bfaddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 637.155512][ T1139] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446909 [ 637.155521][ T1139] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 637.155530][ T1139] RBP: 00000000006dbc20 R08: 00007fdf0bfae700 R09: 0000000000000000 [ 637.155538][ T1139] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.155547][ T1139] R13: 00007ffdf270c61f R14: 00007fdf0bfae9c0 R15: 000000000000002d [ 637.155574][ T1139] INFO: task syz-executor327:7043 blocked for more than 143 seconds. [ 637.155582][ T1139] Not tainted 5.6.0-syzkaller #0 [ 637.155588][ T1139] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.155594][ T1139] syz-executor327 D28224 7043 7029 0x00000004 [ 637.155614][ T1139] Call Trace: [ 637.155634][ T1139] ? __schedule+0x937/0x1ff0 [ 637.155655][ T1139] ? firmware_map_remove+0x19c/0x19c [ 637.155681][ T1139] schedule+0xd0/0x2a0 [ 637.155700][ T1139] schedule_preempt_disabled+0xf/0x20 [ 637.155714][ T1139] __mutex_lock+0x7ab/0x13c0 [ 637.155731][ T1139] ? fb_open+0xd3/0x430 [ 637.155752][ T1139] ? mutex_trylock+0x2c0/0x2c0 [ 637.155773][ T1139] ? __mutex_unlock_slowpath+0xe2/0x660 [ 637.155786][ T1139] ? chrdev_open+0xc4/0x5c0 [ 637.155806][ T1139] ? lock_downgrade+0x840/0x840 [ 637.155829][ T1139] ? fb_open+0xd3/0x430 [ 637.155841][ T1139] fb_open+0xd3/0x430 [ 637.155857][ T1139] ? get_fb_info.part.0+0x80/0x80 [ 637.155869][ T1139] chrdev_open+0x219/0x5c0 [ 637.155885][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.155906][ T1139] ? security_file_open+0x84/0x410 [ 637.155923][ T1139] do_dentry_open+0x4ba/0x1290 [ 637.155939][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.155958][ T1139] ? security_inode_permission+0xc4/0xf0 [ 637.155971][ T1139] ? chown_common+0x550/0x550 [ 637.155988][ T1139] ? inode_permission+0xab/0x500 [ 637.156009][ T1139] path_openat+0x1e59/0x27d0 [ 637.156033][ T1139] ? path_lookupat.isra.0+0x530/0x530 [ 637.156051][ T1139] ? print_usage_bug+0x240/0x240 [ 637.156075][ T1139] do_filp_open+0x192/0x260 [ 637.156090][ T1139] ? may_open_dev+0xf0/0xf0 [ 637.156116][ T1139] ? do_raw_spin_lock+0x129/0x2e0 [ 637.156141][ T1139] ? _raw_spin_unlock+0x24/0x40 [ 637.156154][ T1139] ? __alloc_fd+0x46d/0x600 [ 637.156177][ T1139] do_sys_openat2+0x585/0x7d0 [ 637.156194][ T1139] ? file_open_root+0x400/0x400 [ 637.156216][ T1139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 637.156235][ T1139] do_sys_open+0xc3/0x140 [ 637.156248][ T1139] ? filp_open+0x70/0x70 [ 637.156267][ T1139] ? fpregs_mark_activate+0x320/0x320 [ 637.156282][ T1139] ? trace_hardirqs_off_caller+0x55/0x230 [ 637.156306][ T1139] do_syscall_64+0xf6/0x7d0 [ 637.156324][ T1139] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 637.156334][ T1139] RIP: 0033:0x446909 [ 637.156352][ T1139] Code: Bad RIP value. [ 637.156360][ T1139] RSP: 002b:00007fdf0bfaddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 637.156373][ T1139] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446909 [ 637.156382][ T1139] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 637.156390][ T1139] RBP: 00000000006dbc20 R08: 00007fdf0bfae700 R09: 0000000000000000 [ 637.156399][ T1139] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.156407][ T1139] R13: 00007ffdf270c61f R14: 00007fdf0bfae9c0 R15: 000000000000002d [ 637.156434][ T1139] INFO: task syz-executor327:7040 blocked for more than 143 seconds. [ 637.156442][ T1139] Not tainted 5.6.0-syzkaller #0 [ 637.156448][ T1139] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 637.156454][ T1139] syz-executor327 D28400 7040 7027 0x00000004 [ 637.156473][ T1139] Call Trace: [ 637.156493][ T1139] ? __schedule+0x937/0x1ff0 [ 637.156515][ T1139] ? firmware_map_remove+0x19c/0x19c [ 637.156541][ T1139] schedule+0xd0/0x2a0 [ 637.156559][ T1139] schedule_preempt_disabled+0xf/0x20 [ 637.156574][ T1139] __mutex_lock+0x7ab/0x13c0 [ 637.156591][ T1139] ? fb_open+0xd3/0x430 [ 637.156612][ T1139] ? mutex_trylock+0x2c0/0x2c0 [ 637.156632][ T1139] ? __mutex_unlock_slowpath+0xe2/0x660 [ 637.156645][ T1139] ? chrdev_open+0xc4/0x5c0 [ 637.156665][ T1139] ? lock_downgrade+0x840/0x840 [ 637.156687][ T1139] ? fb_open+0xd3/0x430 [ 637.156699][ T1139] fb_open+0xd3/0x430 [ 637.156716][ T1139] ? get_fb_info.part.0+0x80/0x80 [ 637.156729][ T1139] chrdev_open+0x219/0x5c0 [ 637.156744][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.156765][ T1139] ? security_file_open+0x84/0x410 [ 637.156782][ T1139] do_dentry_open+0x4ba/0x1290 [ 637.156798][ T1139] ? cdev_put.part.0+0x50/0x50 [ 637.156817][ T1139] ? security_inode_permission+0xc4/0xf0 [ 637.156830][ T1139] ? chown_common+0x550/0x550 [ 637.156846][ T1139] ? inode_permission+0xab/0x500 [ 637.156868][ T1139] path_openat+0x1e59/0x27d0 [ 637.156892][ T1139] ? path_lookupat.isra.0+0x530/0x530 [ 637.156911][ T1139] ? print_usage_bug+0x240/0x240 [ 637.156935][ T1139] do_filp_open+0x192/0x260 [ 637.156950][ T1139] ? may_open_dev+0xf0/0xf0 [ 637.156976][ T1139] ? do_raw_spin_lock+0x129/0x2e0 [ 637.157000][ T1139] ? _raw_spin_unlock+0x24/0x40 [ 637.157014][ T1139] ? __alloc_fd+0x46d/0x600 [ 637.157037][ T1139] do_sys_openat2+0x585/0x7d0 [ 637.157054][ T1139] ? file_open_root+0x400/0x400 [ 637.157076][ T1139] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 637.157095][ T1139] do_sys_open+0xc3/0x140 [ 637.157108][ T1139] ? filp_open+0x70/0x70 [ 637.157127][ T1139] ? fpregs_mark_activate+0x320/0x320 [ 637.157142][ T1139] ? trace_hardirqs_off_caller+0x55/0x230 [ 637.157166][ T1139] do_syscall_64+0xf6/0x7d0 [ 637.157184][ T1139] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 637.157194][ T1139] RIP: 0033:0x446909 [ 637.157207][ T1139] Code: Bad RIP value. [ 637.157215][ T1139] RSP: 002b:00007fdf0bfaddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 637.157228][ T1139] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446909 [ 637.157237][ T1139] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 637.157246][ T1139] RBP: 00000000006dbc20 R08: 00007fdf0bfae700 R09: 0000000000000000 [ 637.157254][ T1139] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.157263][ T1139] R13: 00007ffdf270c61f R14: 00007fdf0bfae9c0 R15: 000000000000002d [ 637.157286][ T1139] [ 637.157286][ T1139] Showing all locks held in the system: [ 637.157299][ T1139] 1 lock held by khungtaskd/1139: [ 637.157304][ T1139] #0: ffffffff899bc180 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 637.157374][ T1139] 1 lock held by in:imklog/6712: [ 637.157379][ T1139] #0: ffff88809fe37e30 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 637.157414][ T1139] 2 locks held by syz-executor327/7033: [ 637.157424][ T1139] 1 lock held by syz-executor327/7039: [ 637.157428][ T1139] #0: ffff888218d4f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 637.157460][ T1139] 1 lock held by syz-executor327/7041: [ 637.157465][ T1139] #0: ffff888218d4f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 637.157496][ T1139] 1 lock held by syz-executor327/7042: [ 637.157501][ T1139] #0: ffff888218d4f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 637.157532][ T1139] 1 lock held by syz-executor327/7043: [ 637.157537][ T1139] #0: ffff888218d4f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 637.157568][ T1139] 1 lock held by syz-executor327/7040: [ 637.157573][ T1139] #0: ffff888218d4f078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 637.157600][ T1139] [ 637.157605][ T1139] ============================================= [ 637.157605][ T1139] [ 637.157612][ T1139] NMI backtrace for cpu 0 [ 637.157625][ T1139] CPU: 0 PID: 1139 Comm: khungtaskd Not tainted 5.6.0-syzkaller #0 [ 637.157633][ T1139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.157637][ T1139] Call Trace: [ 637.157743][ T1139] dump_stack+0x188/0x20d [ 637.157764][ T1139] nmi_cpu_backtrace.cold+0x70/0xb1 [ 637.157810][ T1139] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 637.157832][ T1139] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 637.157875][ T1139] watchdog+0xa8c/0x1010 [ 637.157895][ T1139] ? reset_hung_task_detector+0x30/0x30 [ 637.157931][ T1139] kthread+0x388/0x470 [ 637.157945][ T1139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 637.157961][ T1139] ret_from_fork+0x24/0x30 [ 637.157985][ T1139] Sending NMI from CPU 0 to CPUs 1: [ 637.158738][ C1] NMI backtrace for cpu 1 [ 637.158743][ C1] CPU: 1 PID: 7033 Comm: syz-executor327 Not tainted 5.6.0-syzkaller #0 [ 637.158749][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.158752][ C1] RIP: 0010:write_comp_data+0x1e/0x70 [ 637.158762][ C1] Code: 48 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 00 1f 02 00 65 8b 05 38 fa 8e 7e a9 00 01 1f 00 75 51 41 8b 80 d8 13 00 00 <83> f8 03 75 45 49 8b 80 e0 13 00 00 45 8b 80 dc 13 00 00 4c 8b 08 [ 637.158766][ C1] RSP: 0018:ffffc900016474d0 EFLAGS: 00000246 [ 637.158772][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff83ba3614 [ 637.158777][ C1] RDX: 0000000000000010 RSI: 0000000000000007 RDI: 0000000000000005 [ 637.158781][ C1] RBP: ffff8880000a00c0 R08: ffff888094ad4040 R09: 0000000000000040 [ 637.158785][ C1] R10: ffff888218cf855f R11: ffffed104319f0ab R12: 0000000000000028 [ 637.158790][ C1] R13: ffff8880000a0000 R14: 0000000000000000 R15: 0000000000000010 [ 637.158795][ C1] FS: 00007fdf0bfae700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 637.158799][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 637.158803][ C1] CR2: 0000000020000180 CR3: 00000000969cb000 CR4: 00000000001406e0 [ 637.158807][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 637.158812][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 637.158814][ C1] Call Trace: [ 637.158817][ C1] bitfill_aligned+0x134/0x200 [ 637.158820][ C1] cfb_fillrect+0x418/0x7a0 [ 637.158823][ C1] ? cfb_fillrect+0x7a0/0x7a0 [ 637.158826][ C1] vga16fb_fillrect+0x68f/0x1960 [ 637.158829][ C1] ? memcpy+0x39/0x60 [ 637.158832][ C1] bit_clear_margins+0x2d5/0x4a0 [ 637.158835][ C1] ? bit_bmove+0x210/0x210 [ 637.158839][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 637.158848][ C1] fbcon_clear_margins+0x1de/0x240 [ 637.158851][ C1] fbcon_switch+0xd21/0x1740 [ 637.158854][ C1] ? fbcon_set_def_font+0x370/0x370 [ 637.158857][ C1] ? fbcon_cursor+0x477/0x650 [ 637.158860][ C1] ? bit_clear+0x4e0/0x4e0 [ 637.158863][ C1] ? is_console_locked+0x5/0x10 [ 637.158866][ C1] ? fbcon_set_origin+0x26/0x50 [ 637.158869][ C1] redraw_screen+0x2ae/0x770 [ 637.158873][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 637.158876][ C1] ? respond_string+0x290/0x290 [ 637.158879][ C1] ? fbcon_set_palette+0x3b1/0x4a0 [ 637.158882][ C1] fbcon_modechanged+0x5c3/0x790 [ 637.158885][ C1] fbcon_update_vcs+0x3a/0x50 [ 637.158887][ C1] fb_set_var+0xad0/0xd40 [ 637.158890][ C1] ? fb_blank+0x190/0x190 [ 637.158893][ C1] ? mark_held_locks+0xe0/0xe0 [ 637.158897][ C1] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 637.158900][ C1] do_fb_ioctl+0x390/0x6e0 [ 637.158902][ C1] ? fb_mmap+0x550/0x550 [ 637.158906][ C1] ? tomoyo_execute_permission+0x470/0x470 [ 637.158909][ C1] ? __fget_files+0x30d/0x500 [ 637.158913][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 637.158916][ C1] ? do_vfs_ioctl+0x50c/0x12d0 [ 637.158918][ C1] ? ksys_dup3+0x3c0/0x3c0 [ 637.158922][ C1] ? __x64_sys_futex+0x376/0x4f0 [ 637.158925][ C1] ? __x64_sys_futex+0x380/0x4f0 [ 637.158927][ C1] fb_ioctl+0xdd/0x130 [ 637.158930][ C1] ? do_fb_ioctl+0x6e0/0x6e0 [ 637.158933][ C1] ksys_ioctl+0x11a/0x180 [ 637.158936][ C1] __x64_sys_ioctl+0x6f/0xb0 [ 637.158939][ C1] ? lockdep_hardirqs_on+0x463/0x620 [ 637.158942][ C1] do_syscall_64+0xf6/0x7d0 [ 637.158946][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 637.158949][ C1] RIP: 0033:0x446909 [ 637.158958][ C1] Code: e8 0c 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 637.158961][ C1] RSP: 002b:00007fdf0bfaddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 637.158969][ C1] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446909 [ 637.158974][ C1] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 637.158978][ C1] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 637.158982][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 637.158987][ C1] R13: 00007ffdf270c61f R14: 00007fdf0bfae9c0 R15: 000000000000002d [ 637.159003][ T1139] Kernel panic - not syncing: hung_task: blocked tasks [ 637.159016][ T1139] CPU: 0 PID: 1139 Comm: khungtaskd Not tainted 5.6.0-syzkaller #0 [ 637.159024][ T1139] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 637.159028][ T1139] Call Trace: [ 637.159042][ T1139] dump_stack+0x188/0x20d [ 637.159079][ T1139] panic+0x2e3/0x75c [ 637.159090][ T1139] ? add_taint.cold+0x16/0x16 [ 637.159103][ T1139] ? cpumask_next+0x3c/0x40 [ 637.159113][ T1139] ? printk_safe_flush+0xd9/0x120 [ 637.159122][ T1139] ? watchdog+0xa8c/0x1010 [ 637.159134][ T1139] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 637.159145][ T1139] watchdog+0xa9d/0x1010 [ 637.159159][ T1139] ? reset_hung_task_detector+0x30/0x30 [ 637.159171][ T1139] kthread+0x388/0x470 [ 637.159181][ T1139] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 637.159193][ T1139] ret_from_fork+0x24/0x30 [ 637.161405][ T1139] Kernel Offset: disabled [ 639.217666][ T1139] Rebooting in 86400 seconds..