Warning: Permanently added '10.128.1.51' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 1057.960435] audit: type=1400 audit(1595071796.306:8): avc: denied { execmem } for pid=6351 comm="syz-executor183" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 1288.111317] INFO: task syz-executor183:6358 blocked for more than 140 seconds. [ 1288.111326] Not tainted 4.14.184-syzkaller #0 [ 1288.111329] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.111334] syz-executor183 D28768 6358 6357 0x00000004 [ 1288.111413] Call Trace: [ 1288.111507] __schedule+0x8a6/0x1d70 [ 1288.111564] ? bad_range+0x255/0x3a0 [ 1288.111579] ? firmware_map_remove+0x18f/0x18f [ 1288.111640] ? __lock_acquire+0x655/0x42a0 [ 1288.111650] ? __down+0x133/0x280 [ 1288.111656] schedule+0x8d/0x1b0 [ 1288.111666] schedule_timeout+0x86c/0xe50 [ 1288.111682] ? usleep_range+0x130/0x130 [ 1288.111690] ? __down+0x177/0x280 [ 1288.111703] ? lock_downgrade+0x6e0/0x6e0 [ 1288.111712] ? _raw_spin_unlock_irq+0x24/0x90 [ 1288.111721] ? __down+0x133/0x280 [ 1288.111728] __down+0x17f/0x280 [ 1288.111739] ? ww_mutex_lock+0x180/0x180 [ 1288.111746] ? down+0xd/0x80 [ 1288.111760] down+0x57/0x80 [ 1288.111796] console_lock+0x24/0x70 [ 1288.111831] do_fb_ioctl+0x36a/0x840 [ 1288.111841] ? lock_downgrade+0x6e0/0x6e0 [ 1288.111849] ? fb_write+0x550/0x550 [ 1288.111879] ? avc_has_extended_perms+0x6e2/0xbe0 [ 1288.111892] ? avc_ss_reset+0x100/0x100 [ 1288.111937] ? wp_page_copy+0xfb6/0x1bc0 [ 1288.111952] ? add_mm_counter_fast.part.0+0x30/0x30 [ 1288.111959] ? __lock_acquire+0x655/0x42a0 [ 1288.111986] ? debug_check_no_obj_freed+0x27c/0x5fd [ 1288.112011] fb_ioctl+0xda/0x120 [ 1288.112018] ? do_fb_ioctl+0x840/0x840 [ 1288.112034] do_vfs_ioctl+0x75a/0xfe0 [ 1288.112046] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 1288.112055] ? ioctl_preallocate+0x1a0/0x1a0 [ 1288.112067] ? lock_downgrade+0x6e0/0x6e0 [ 1288.112098] ? security_file_ioctl+0x76/0xb0 [ 1288.112106] ? security_file_ioctl+0x83/0xb0 [ 1288.112115] SyS_ioctl+0x7f/0xb0 [ 1288.112122] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1288.112134] do_syscall_64+0x1d5/0x640 [ 1288.112149] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1288.112157] RIP: 0033:0x4414e9 [ 1288.112162] RSP: 002b:00007ffdf9be7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1288.112172] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414e9 [ 1288.112177] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1288.112182] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1288.112187] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021e0 [ 1288.112192] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 1288.112211] INFO: task syz-executor183:6360 blocked for more than 140 seconds. [ 1288.112217] Not tainted 4.14.184-syzkaller #0 [ 1288.112220] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.112224] syz-executor183 D28928 6360 6353 0x00000004 [ 1288.112244] Call Trace: [ 1288.112256] __schedule+0x8a6/0x1d70 [ 1288.112263] ? bad_range+0x255/0x3a0 [ 1288.112277] ? firmware_map_remove+0x18f/0x18f [ 1288.112285] ? __lock_acquire+0x655/0x42a0 [ 1288.112294] ? __down+0x133/0x280 [ 1288.112300] schedule+0x8d/0x1b0 [ 1288.112308] schedule_timeout+0x86c/0xe50 [ 1288.112320] ? usleep_range+0x130/0x130 [ 1288.112328] ? __down+0x177/0x280 [ 1288.112340] ? lock_downgrade+0x6e0/0x6e0 [ 1288.112349] ? _raw_spin_unlock_irq+0x24/0x90 [ 1288.112359] ? __down+0x133/0x280 [ 1288.112366] __down+0x17f/0x280 [ 1288.112377] ? ww_mutex_lock+0x180/0x180 [ 1288.112383] ? down+0xd/0x80 [ 1288.112397] down+0x57/0x80 [ 1288.112405] console_lock+0x24/0x70 [ 1288.112412] do_fb_ioctl+0x36a/0x840 [ 1288.112419] ? lock_downgrade+0x6e0/0x6e0 [ 1288.112427] ? fb_write+0x550/0x550 [ 1288.112438] ? avc_has_extended_perms+0x6e2/0xbe0 [ 1288.112450] ? avc_ss_reset+0x100/0x100 [ 1288.112460] ? wp_page_copy+0xfb6/0x1bc0 [ 1288.112476] ? add_mm_counter_fast.part.0+0x30/0x30 [ 1288.112482] ? __lock_acquire+0x655/0x42a0 [ 1288.112490] ? debug_check_no_obj_freed+0x27c/0x5fd [ 1288.112514] fb_ioctl+0xda/0x120 [ 1288.112521] ? do_fb_ioctl+0x840/0x840 [ 1288.112529] do_vfs_ioctl+0x75a/0xfe0 [ 1288.112538] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 1288.112547] ? ioctl_preallocate+0x1a0/0x1a0 [ 1288.112559] ? lock_downgrade+0x6e0/0x6e0 [ 1288.112571] ? security_file_ioctl+0x76/0xb0 [ 1288.112578] ? security_file_ioctl+0x83/0xb0 [ 1288.112587] SyS_ioctl+0x7f/0xb0 [ 1288.112602] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1288.112612] do_syscall_64+0x1d5/0x640 [ 1288.112626] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1288.112632] RIP: 0033:0x4414e9 [ 1288.112636] RSP: 002b:00007ffdf9be7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1288.112645] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414e9 [ 1288.112650] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1288.112655] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1288.112660] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021e0 [ 1288.112665] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 1288.112682] INFO: task syz-executor183:6361 blocked for more than 140 seconds. [ 1288.112686] Not tainted 4.14.184-syzkaller #0 [ 1288.112690] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.112693] syz-executor183 D28928 6361 6356 0x00000004 [ 1288.112711] Call Trace: [ 1288.112722] __schedule+0x8a6/0x1d70 [ 1288.112729] ? bad_range+0x255/0x3a0 [ 1288.112742] ? firmware_map_remove+0x18f/0x18f [ 1288.112751] ? __lock_acquire+0x655/0x42a0 [ 1288.112760] ? __down+0x133/0x280 [ 1288.112766] schedule+0x8d/0x1b0 [ 1288.112774] schedule_timeout+0x86c/0xe50 [ 1288.112786] ? usleep_range+0x130/0x130 [ 1288.112794] ? __down+0x177/0x280 [ 1288.112806] ? lock_downgrade+0x6e0/0x6e0 [ 1288.112815] ? _raw_spin_unlock_irq+0x24/0x90 [ 1288.112825] ? __down+0x133/0x280 [ 1288.112831] __down+0x17f/0x280 [ 1288.112842] ? ww_mutex_lock+0x180/0x180 [ 1288.112848] ? down+0xd/0x80 [ 1288.112862] down+0x57/0x80 [ 1288.112871] console_lock+0x24/0x70 [ 1288.112878] do_fb_ioctl+0x36a/0x840 [ 1288.112885] ? lock_downgrade+0x6e0/0x6e0 [ 1288.112892] ? fb_write+0x550/0x550 [ 1288.112903] ? avc_has_extended_perms+0x6e2/0xbe0 [ 1288.112915] ? avc_ss_reset+0x100/0x100 [ 1288.112925] ? wp_page_copy+0xfb6/0x1bc0 [ 1288.112940] ? add_mm_counter_fast.part.0+0x30/0x30 [ 1288.112947] ? __lock_acquire+0x655/0x42a0 [ 1288.112954] ? debug_check_no_obj_freed+0x27c/0x5fd [ 1288.112979] fb_ioctl+0xda/0x120 [ 1288.112986] ? do_fb_ioctl+0x840/0x840 [ 1288.112994] do_vfs_ioctl+0x75a/0xfe0 [ 1288.113003] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 1288.113012] ? ioctl_preallocate+0x1a0/0x1a0 [ 1288.113024] ? lock_downgrade+0x6e0/0x6e0 [ 1288.113036] ? security_file_ioctl+0x76/0xb0 [ 1288.113044] ? security_file_ioctl+0x83/0xb0 [ 1288.113053] SyS_ioctl+0x7f/0xb0 [ 1288.113060] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1288.113069] do_syscall_64+0x1d5/0x640 [ 1288.113083] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1288.113088] RIP: 0033:0x4414e9 [ 1288.113092] RSP: 002b:00007ffdf9be7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1288.113101] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414e9 [ 1288.113106] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1288.113111] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1288.113116] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021e0 [ 1288.113121] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 1288.113139] INFO: task syz-executor183:6362 blocked for more than 140 seconds. [ 1288.113143] Not tainted 4.14.184-syzkaller #0 [ 1288.113146] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.113150] syz-executor183 D28752 6362 6354 0x00000004 [ 1288.113167] Call Trace: [ 1288.113179] __schedule+0x8a6/0x1d70 [ 1288.113194] ? firmware_map_remove+0x18f/0x18f [ 1288.113201] ? lock_downgrade+0x6e0/0x6e0 [ 1288.113212] schedule+0x8d/0x1b0 [ 1288.113220] schedule_preempt_disabled+0xf/0x20 [ 1288.113227] __mutex_lock+0x5f0/0x1430 [ 1288.113236] ? get_fb_info.part.0+0x5f/0x70 [ 1288.113243] ? fb_open+0xb7/0x400 [ 1288.113257] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.113267] ? __mutex_unlock_slowpath+0x75/0x780 [ 1288.113284] ? fb_open+0xb7/0x400 [ 1288.113290] fb_open+0xb7/0x400 [ 1288.113300] ? get_fb_info.part.0+0x70/0x70 [ 1288.113359] chrdev_open+0x1fc/0x540 [ 1288.113370] ? cdev_put.part.0+0x50/0x50 [ 1288.113384] do_dentry_open+0x44b/0xec0 [ 1288.113393] ? cdev_put.part.0+0x50/0x50 [ 1288.113403] ? __inode_permission+0xcd/0x2f0 [ 1288.113412] vfs_open+0x105/0x220 [ 1288.113425] path_openat+0xb68/0x2aa0 [ 1288.113442] ? path_mountpoint+0x960/0x960 [ 1288.113451] ? trace_hardirqs_on+0x10/0x10 [ 1288.113461] ? _raw_spin_unlock+0x29/0x40 [ 1288.113472] do_filp_open+0x18e/0x250 [ 1288.113483] ? may_open_dev+0xe0/0xe0 [ 1288.113496] ? lock_acquire+0x170/0x3f0 [ 1288.113504] ? lock_downgrade+0x6e0/0x6e0 [ 1288.113515] ? do_raw_spin_unlock+0x164/0x250 [ 1288.113525] ? __alloc_fd+0x1bf/0x490 [ 1288.113539] do_sys_open+0x292/0x3e0 [ 1288.113549] ? filp_open+0x60/0x60 [ 1288.113560] ? __do_page_fault+0x19a/0xb50 [ 1288.113569] ? do_syscall_64+0x4c/0x640 [ 1288.113575] ? SyS_open+0x30/0x30 [ 1288.113585] do_syscall_64+0x1d5/0x640 [ 1288.113604] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1288.113610] RIP: 0033:0x4414e9 [ 1288.113615] RSP: 002b:00007ffdf9be7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1288.113624] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414e9 [ 1288.113629] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 1288.113634] RBP: 00000000006cb018 R08: 0000000000000004 R09: 00000000004002c8 [ 1288.113639] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004021e0 [ 1288.113644] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 1288.113662] INFO: task syz-executor183:6363 blocked for more than 140 seconds. [ 1288.113666] Not tainted 4.14.184-syzkaller #0 [ 1288.113669] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1288.113673] syz-executor183 D28928 6363 6352 0x00000004 [ 1288.113691] Call Trace: [ 1288.113704] __schedule+0x8a6/0x1d70 [ 1288.113718] ? firmware_map_remove+0x18f/0x18f [ 1288.113725] ? lock_downgrade+0x6e0/0x6e0 [ 1288.113736] schedule+0x8d/0x1b0 [ 1288.113744] schedule_preempt_disabled+0xf/0x20 [ 1288.113751] __mutex_lock+0x5f0/0x1430 [ 1288.113758] ? get_fb_info.part.0+0x5f/0x70 [ 1288.113765] ? fb_open+0xb7/0x400 [ 1288.113778] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.113789] ? __mutex_unlock_slowpath+0x75/0x780 [ 1288.113806] ? fb_open+0xb7/0x400 [ 1288.113812] fb_open+0xb7/0x400 [ 1288.113821] ? get_fb_info.part.0+0x70/0x70 [ 1288.113829] chrdev_open+0x1fc/0x540 [ 1288.113838] ? cdev_put.part.0+0x50/0x50 [ 1288.113852] do_dentry_open+0x44b/0xec0 [ 1288.113860] ? cdev_put.part.0+0x50/0x50 [ 1288.113870] ? __inode_permission+0xcd/0x2f0 [ 1288.113880] vfs_open+0x105/0x220 [ 1288.113891] path_openat+0xb68/0x2aa0 [ 1288.113909] ? path_mountpoint+0x960/0x960 [ 1288.113918] ? trace_hardirqs_on+0x10/0x10 [ 1288.113928] ? _raw_spin_unlock+0x29/0x40 [ 1288.113939] do_filp_open+0x18e/0x250 [ 1288.113949] ? may_open_dev+0xe0/0xe0 [ 1288.113962] ? lock_acquire+0x170/0x3f0 [ 1288.113969] ? lock_downgrade+0x6e0/0x6e0 [ 1288.113981] ? do_raw_spin_unlock+0x164/0x250 [ 1288.113989] ? __alloc_fd+0x1bf/0x490 [ 1288.114003] do_sys_open+0x292/0x3e0 [ 1288.114012] ? filp_open+0x60/0x60 [ 1288.114022] ? __do_page_fault+0x19a/0xb50 [ 1288.114030] ? do_syscall_64+0x4c/0x640 [ 1288.114037] ? SyS_open+0x30/0x30 [ 1288.114046] do_syscall_64+0x1d5/0x640 [ 1288.114060] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1288.114065] RIP: 0033:0x4414e9 [ 1288.114070] RSP: 002b:00007ffdf9be7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1288.114078] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414e9 [ 1288.114083] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 1288.114088] RBP: 00000000006cb018 R08: 0000000000000004 R09: 00000000004002c8 [ 1288.114092] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004021e0 [ 1288.114097] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 1288.114112] [ 1288.114112] Showing all locks held in the system: [ 1288.114125] 1 lock held by khungtaskd/1056: [ 1288.114129] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1288.114172] 1 lock held by in:imklog/6031: [ 1288.114175] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa6/0xc0 [ 1288.114199] 1 lock held by syz-executor183/6362: [ 1288.114202] #0: (&fb_info->lock){+.+.}, at: [] fb_open+0xb7/0x400 [ 1288.114221] 1 lock held by syz-executor183/6363: [ 1288.114224] #0: (&fb_info->lock){+.+.}, at: [] fb_open+0xb7/0x400 [ 1288.114241] [ 1288.114244] ============================================= [ 1288.114244] [ 1288.114249] NMI backtrace for cpu 0 [ 1288.114257] CPU: 0 PID: 1056 Comm: khungtaskd Not tainted 4.14.184-syzkaller #0 [ 1288.114262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1288.114265] Call Trace: [ 1288.114306] dump_stack+0x1b2/0x283 [ 1288.114345] nmi_cpu_backtrace.cold+0x57/0x93 [ 1288.114371] ? irq_force_complete_move.cold+0x7b/0x7b [ 1288.114379] nmi_trigger_cpumask_backtrace+0x13a/0x17f [ 1288.114428] watchdog+0x5e2/0xb80 [ 1288.114439] ? kthread_flush_work_fn+0x20/0x20 [ 1288.114449] ? hungtask_pm_notify+0x50/0x50 [ 1288.114459] kthread+0x30d/0x420 [ 1288.114467] ? kthread_create_on_node+0xd0/0xd0 [ 1288.114477] ret_from_fork+0x24/0x30 [ 1288.114494] Sending NMI from CPU 0 to CPUs 1: [ 1288.115141] NMI backtrace for cpu 1 [ 1288.115146] CPU: 1 PID: 6359 Comm: syz-executor183 Not tainted 4.14.184-syzkaller #0 [ 1288.115150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1288.115153] task: ffff88808733e640 task.stack: ffff888097d78000 [ 1288.115156] RIP: 0010:bitfill_aligned+0xf3/0x190 [ 1288.115158] RSP: 0000:ffff888097d7f328 EFLAGS: 00000297 [ 1288.115163] RAX: ffff8880000a0238 RBX: ffff8880000a0200 RCX: 0000000000000000 [ 1288.115167] RDX: 0000000000000000 RSI: ffff8880000a0000 RDI: 0000000000001400 [ 1288.115170] RBP: 0000000000000050 R08: 0000000000001400 R09: 0000000000000040 [ 1288.115173] R10: ffffed1014bd798b R11: ffff8880a5ebcc5f R12: ffff8880000a0280 [ 1288.115177] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1288.115180] FS: 0000000001811880(0000) GS:ffff8880aed00000(0000) knlGS:0000000000000000 [ 1288.115183] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1288.115187] CR2: 00000000006cc080 CR3: 00000000a1568000 CR4: 00000000001406e0 [ 1288.115190] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1288.115193] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1288.115195] Call Trace: [ 1288.115198] cfb_fillrect+0x3d5/0x720 [ 1288.115200] ? cfb_fillrect+0x720/0x720 [ 1288.115202] vga16fb_fillrect+0x61e/0x1880 [ 1288.115205] ? fb_copy_cmap+0x28e/0x350 [ 1288.115207] ? vga16fb_setcolreg+0xfe/0x360 [ 1288.115209] bit_clear_margins+0x2a4/0x480 [ 1288.115212] ? bit_clear+0x460/0x460 [ 1288.115214] fbcon_clear_margins+0x274/0x300 [ 1288.115217] fbcon_switch+0xc4e/0x1700 [ 1288.115219] ? fbcon_set_font+0x7c0/0x7c0 [ 1288.115221] ? bit_update_start+0x1f0/0x1f0 [ 1288.115224] ? fbcon_set_origin+0x1c/0x40 [ 1288.115226] ? fbcon_scrolldelta+0x1080/0x1080 [ 1288.115229] redraw_screen+0x332/0x760 [ 1288.115231] ? set_palette+0x130/0x130 [ 1288.115234] ? fbcon_set_palette+0x466/0x580 [ 1288.115236] fbcon_modechanged+0x552/0x800 [ 1288.115239] fbcon_event_notify+0x11a/0x1750 [ 1288.115241] ? lock_acquire+0x170/0x3f0 [ 1288.115243] notifier_call_chain+0x107/0x1a0 [ 1288.115246] blocking_notifier_call_chain+0x79/0x90 [ 1288.115248] fb_set_var+0xaad/0xc70 [ 1288.115250] ? fb_set_suspend+0x110/0x110 [ 1288.115253] ? lock_acquire+0x170/0x3f0 [ 1288.115255] ? lock_fb_info+0x1a/0x70 [ 1288.115258] ? lock_fb_info+0x1a/0x70 [ 1288.115260] ? __mutex_lock+0x2cb/0x1430 [ 1288.115262] ? trace_hardirqs_on+0x10/0x10 [ 1288.115265] ? lock_fb_info+0x1a/0x70 [ 1288.115267] ? __ww_mutex_wakeup_for_backoff+0x210/0x210 [ 1288.115270] ? do_fb_ioctl+0x36a/0x840 [ 1288.115272] do_fb_ioctl+0x3cc/0x840 [ 1288.115274] ? lock_downgrade+0x6e0/0x6e0 [ 1288.115277] ? fb_write+0x550/0x550 [ 1288.115280] ? avc_has_extended_perms+0x6e2/0xbe0 [ 1288.115282] ? avc_ss_reset+0x100/0x100 [ 1288.115284] ? wp_page_copy+0xfb6/0x1bc0 [ 1288.115287] ? add_mm_counter_fast.part.0+0x30/0x30 [ 1288.115289] ? __lock_acquire+0x655/0x42a0 [ 1288.115292] ? debug_check_no_obj_freed+0x27c/0x5fd [ 1288.115294] fb_ioctl+0xda/0x120 [ 1288.115296] ? do_fb_ioctl+0x840/0x840 [ 1288.115299] do_vfs_ioctl+0x75a/0xfe0 [ 1288.115301] ? selinux_parse_skb.constprop.0+0x16c0/0x16c0 [ 1288.115304] ? ioctl_preallocate+0x1a0/0x1a0 [ 1288.115306] ? lock_downgrade+0x6e0/0x6e0 [ 1288.115309] ? security_file_ioctl+0x76/0xb0 [ 1288.115311] ? security_file_ioctl+0x83/0xb0 [ 1288.115313] SyS_ioctl+0x7f/0xb0 [ 1288.115316] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1288.115318] do_syscall_64+0x1d5/0x640 [ 1288.115321] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 1288.115323] RIP: 0033:0x4414e9 [ 1288.115325] RSP: 002b:00007ffdf9be7278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1288.115331] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004414e9 [ 1288.115335] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1288.115338] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1288.115341] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004021e0 [ 1288.115345] R13: 0000000000402270 R14: 0000000000000000 R15: 0000000000000000 [ 1288.115346] Code: 49 c1 e4 06 49 01 dc e8 3c a6 3e fe 4c 89 3b 4c 89 7b 08 4c 89 7b 10 4c 89 7b 18 4c 89 7b 20 4c 89 7b 28 48 8d 43 38 4c 89 7b 30 <48> 83 c3 40 4c 89 38 49 39 dc 75 d0 83 e5 07 41 89 ec e8 06 a6 [ 1288.115510] Kernel panic - not syncing: hung_task: blocked tasks [ 1288.115519] CPU: 0 PID: 1056 Comm: khungtaskd Not tainted 4.14.184-syzkaller #0 [ 1288.115523] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1288.115526] Call Trace: [ 1288.115536] dump_stack+0x1b2/0x283 [ 1288.115549] panic+0x1f9/0x42d [ 1288.115558] ? add_taint.cold+0x16/0x16 [ 1288.115569] ? printk_safe_flush+0xac/0x110 [ 1288.115583] watchdog+0x5f3/0xb80 [ 1288.115601] ? kthread_flush_work_fn+0x20/0x20 [ 1288.115611] ? hungtask_pm_notify+0x50/0x50 [ 1288.115621] kthread+0x30d/0x420 [ 1288.115629] ? kthread_create_on_node+0xd0/0xd0 [ 1288.115638] ret_from_fork+0x24/0x30 [ 1288.117152] Kernel Offset: disabled