Warning: Permanently added '10.128.0.65' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 595.846861][ T1134] INFO: task syz-executor718:7099 blocked for more than 143 seconds. [ 595.846897][ T1134] Not tainted 5.6.0-rc7-syzkaller #0 [ 595.846903][ T1134] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.846909][ T1134] syz-executor718 D28392 7099 7095 0x20020004 [ 595.846931][ T1134] Call Trace: [ 595.847045][ T1134] ? __schedule+0x934/0x1f90 [ 595.847071][ T1134] ? __sched_text_start+0x8/0x8 [ 595.847102][ T1134] schedule+0xd0/0x2a0 [ 595.847122][ T1134] schedule_preempt_disabled+0xf/0x20 [ 595.847171][ T1134] __mutex_lock+0x7ab/0x13c0 [ 595.847219][ T1134] ? fb_open+0xd3/0x430 [ 595.847242][ T1134] ? mutex_trylock+0x2c0/0x2c0 [ 595.847265][ T1134] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.847305][ T1134] ? chrdev_open+0xc4/0x5c0 [ 595.847350][ T1134] ? lock_downgrade+0x7f0/0x7f0 [ 595.847378][ T1134] ? fb_open+0xd3/0x430 [ 595.847387][ T1134] fb_open+0xd3/0x430 [ 595.847404][ T1134] ? get_fb_info.part.0+0x80/0x80 [ 595.847417][ T1134] chrdev_open+0x219/0x5c0 [ 595.847449][ T1134] ? rwlock_bug.part.0+0x90/0x90 [ 595.847464][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.847520][ T1134] do_dentry_open+0x4a2/0x1250 [ 595.847538][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.847598][ T1134] ? security_inode_permission+0xc4/0xf0 [ 595.847613][ T1134] ? chown_common+0x550/0x550 [ 595.847652][ T1134] ? inode_permission+0xab/0x500 [ 595.847679][ T1134] path_openat+0x122a/0x32b0 [ 595.847716][ T1134] ? path_mountpoint.isra.0+0x370/0x370 [ 595.847737][ T1134] ? __lock_acquire+0x14bd/0x3ca0 [ 595.847766][ T1134] do_filp_open+0x192/0x260 [ 595.847783][ T1134] ? may_open_dev+0xf0/0xf0 [ 595.847812][ T1134] ? do_raw_spin_lock+0x129/0x2e0 [ 595.847843][ T1134] ? _raw_spin_unlock+0x24/0x40 [ 595.847887][ T1134] ? __alloc_fd+0x46d/0x600 [ 595.847917][ T1134] do_sys_openat2+0x54c/0x740 [ 595.847936][ T1134] ? file_open_root+0x3d0/0x3d0 [ 595.847972][ T1134] do_sys_open+0xc3/0x140 [ 595.847987][ T1134] ? filp_open+0x70/0x70 [ 595.848031][ T1134] ? fpregs_mark_activate+0x320/0x320 [ 595.848084][ T1134] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.848131][ T1134] do_fast_syscall_32+0x270/0xe8f [ 595.848153][ T1134] entry_SYSENTER_compat+0x70/0x7f [ 595.848190][ T1134] INFO: task syz-executor718:7100 blocked for more than 143 seconds. [ 595.848198][ T1134] Not tainted 5.6.0-rc7-syzkaller #0 [ 595.848204][ T1134] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.848209][ T1134] syz-executor718 D28392 7100 7098 0x20024004 [ 595.848230][ T1134] Call Trace: [ 595.848251][ T1134] ? __schedule+0x934/0x1f90 [ 595.848276][ T1134] ? __sched_text_start+0x8/0x8 [ 595.848306][ T1134] schedule+0xd0/0x2a0 [ 595.848325][ T1134] schedule_preempt_disabled+0xf/0x20 [ 595.848338][ T1134] __mutex_lock+0x7ab/0x13c0 [ 595.848355][ T1134] ? fb_open+0xd3/0x430 [ 595.848378][ T1134] ? mutex_trylock+0x2c0/0x2c0 [ 595.848400][ T1134] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.848413][ T1134] ? chrdev_open+0xc4/0x5c0 [ 595.848434][ T1134] ? lock_downgrade+0x7f0/0x7f0 [ 595.848461][ T1134] ? fb_open+0xd3/0x430 [ 595.848471][ T1134] fb_open+0xd3/0x430 [ 595.848489][ T1134] ? get_fb_info.part.0+0x80/0x80 [ 595.848501][ T1134] chrdev_open+0x219/0x5c0 [ 595.848515][ T1134] ? rwlock_bug.part.0+0x90/0x90 [ 595.848530][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.848560][ T1134] do_dentry_open+0x4a2/0x1250 [ 595.848577][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.848596][ T1134] ? security_inode_permission+0xc4/0xf0 [ 595.848609][ T1134] ? chown_common+0x550/0x550 [ 595.848623][ T1134] ? inode_permission+0xab/0x500 [ 595.848649][ T1134] path_openat+0x122a/0x32b0 [ 595.848685][ T1134] ? path_mountpoint.isra.0+0x370/0x370 [ 595.848706][ T1134] ? __lock_acquire+0x14bd/0x3ca0 [ 595.848735][ T1134] do_filp_open+0x192/0x260 [ 595.848752][ T1134] ? may_open_dev+0xf0/0xf0 [ 595.848781][ T1134] ? do_raw_spin_lock+0x129/0x2e0 [ 595.848812][ T1134] ? _raw_spin_unlock+0x24/0x40 [ 595.848825][ T1134] ? __alloc_fd+0x46d/0x600 [ 595.848854][ T1134] do_sys_openat2+0x54c/0x740 [ 595.848873][ T1134] ? file_open_root+0x3d0/0x3d0 [ 595.848914][ T1134] do_sys_open+0xc3/0x140 [ 595.848928][ T1134] ? filp_open+0x70/0x70 [ 595.848948][ T1134] ? fpregs_mark_activate+0x320/0x320 [ 595.848965][ T1134] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.848989][ T1134] do_fast_syscall_32+0x270/0xe8f [ 595.849010][ T1134] entry_SYSENTER_compat+0x70/0x7f [ 595.849046][ T1134] INFO: task syz-executor718:7101 blocked for more than 143 seconds. [ 595.849054][ T1134] Not tainted 5.6.0-rc7-syzkaller #0 [ 595.849059][ T1134] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.849064][ T1134] syz-executor718 D28392 7101 7097 0x20020004 [ 595.849082][ T1134] Call Trace: [ 595.849103][ T1134] ? __schedule+0x934/0x1f90 [ 595.849128][ T1134] ? __sched_text_start+0x8/0x8 [ 595.849159][ T1134] schedule+0xd0/0x2a0 [ 595.849177][ T1134] schedule_preempt_disabled+0xf/0x20 [ 595.849190][ T1134] __mutex_lock+0x7ab/0x13c0 [ 595.849207][ T1134] ? fb_open+0xd3/0x430 [ 595.849230][ T1134] ? mutex_trylock+0x2c0/0x2c0 [ 595.849252][ T1134] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.849265][ T1134] ? chrdev_open+0xc4/0x5c0 [ 595.849286][ T1134] ? lock_downgrade+0x7f0/0x7f0 [ 595.849313][ T1134] ? fb_open+0xd3/0x430 [ 595.849323][ T1134] fb_open+0xd3/0x430 [ 595.849340][ T1134] ? get_fb_info.part.0+0x80/0x80 [ 595.849353][ T1134] chrdev_open+0x219/0x5c0 [ 595.849366][ T1134] ? rwlock_bug.part.0+0x90/0x90 [ 595.849381][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.849410][ T1134] do_dentry_open+0x4a2/0x1250 [ 595.849427][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.849446][ T1134] ? security_inode_permission+0xc4/0xf0 [ 595.849460][ T1134] ? chown_common+0x550/0x550 [ 595.849473][ T1134] ? inode_permission+0xab/0x500 [ 595.849500][ T1134] path_openat+0x122a/0x32b0 [ 595.849536][ T1134] ? path_mountpoint.isra.0+0x370/0x370 [ 595.849557][ T1134] ? __lock_acquire+0x14bd/0x3ca0 [ 595.849586][ T1134] do_filp_open+0x192/0x260 [ 595.849603][ T1134] ? may_open_dev+0xf0/0xf0 [ 595.849631][ T1134] ? do_raw_spin_lock+0x129/0x2e0 [ 595.849662][ T1134] ? _raw_spin_unlock+0x24/0x40 [ 595.849676][ T1134] ? __alloc_fd+0x46d/0x600 [ 595.849705][ T1134] do_sys_openat2+0x54c/0x740 [ 595.849724][ T1134] ? file_open_root+0x3d0/0x3d0 [ 595.849759][ T1134] do_sys_open+0xc3/0x140 [ 595.849774][ T1134] ? filp_open+0x70/0x70 [ 595.849794][ T1134] ? fpregs_mark_activate+0x320/0x320 [ 595.849811][ T1134] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.849835][ T1134] do_fast_syscall_32+0x270/0xe8f [ 595.849857][ T1134] entry_SYSENTER_compat+0x70/0x7f [ 595.849897][ T1134] INFO: task syz-executor718:7102 blocked for more than 143 seconds. [ 595.849905][ T1134] Not tainted 5.6.0-rc7-syzkaller #0 [ 595.849909][ T1134] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.849915][ T1134] syz-executor718 D28288 7102 7093 0x20020004 [ 595.849933][ T1134] Call Trace: [ 595.849954][ T1134] ? __schedule+0x934/0x1f90 [ 595.849979][ T1134] ? __sched_text_start+0x8/0x8 [ 595.850009][ T1134] schedule+0xd0/0x2a0 [ 595.850028][ T1134] schedule_preempt_disabled+0xf/0x20 [ 595.850040][ T1134] __mutex_lock+0x7ab/0x13c0 [ 595.850057][ T1134] ? fb_open+0xd3/0x430 [ 595.850080][ T1134] ? mutex_trylock+0x2c0/0x2c0 [ 595.850102][ T1134] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.850115][ T1134] ? chrdev_open+0xc4/0x5c0 [ 595.850136][ T1134] ? lock_downgrade+0x7f0/0x7f0 [ 595.850163][ T1134] ? fb_open+0xd3/0x430 [ 595.850173][ T1134] fb_open+0xd3/0x430 [ 595.850190][ T1134] ? get_fb_info.part.0+0x80/0x80 [ 595.850203][ T1134] chrdev_open+0x219/0x5c0 [ 595.850217][ T1134] ? rwlock_bug.part.0+0x90/0x90 [ 595.850231][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.850261][ T1134] do_dentry_open+0x4a2/0x1250 [ 595.850278][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.850297][ T1134] ? security_inode_permission+0xc4/0xf0 [ 595.850335][ T1134] ? chown_common+0x550/0x550 [ 595.850349][ T1134] ? inode_permission+0xab/0x500 [ 595.850375][ T1134] path_openat+0x122a/0x32b0 [ 595.850411][ T1134] ? path_mountpoint.isra.0+0x370/0x370 [ 595.850432][ T1134] ? __lock_acquire+0x14bd/0x3ca0 [ 595.850460][ T1134] do_filp_open+0x192/0x260 [ 595.850477][ T1134] ? may_open_dev+0xf0/0xf0 [ 595.850506][ T1134] ? do_raw_spin_lock+0x129/0x2e0 [ 595.850537][ T1134] ? _raw_spin_unlock+0x24/0x40 [ 595.850550][ T1134] ? __alloc_fd+0x46d/0x600 [ 595.850579][ T1134] do_sys_openat2+0x54c/0x740 [ 595.850599][ T1134] ? file_open_root+0x3d0/0x3d0 [ 595.850634][ T1134] do_sys_open+0xc3/0x140 [ 595.850648][ T1134] ? filp_open+0x70/0x70 [ 595.850669][ T1134] ? fpregs_mark_activate+0x320/0x320 [ 595.850685][ T1134] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.850709][ T1134] do_fast_syscall_32+0x270/0xe8f [ 595.850731][ T1134] entry_SYSENTER_compat+0x70/0x7f [ 595.850767][ T1134] INFO: task syz-executor718:7103 blocked for more than 143 seconds. [ 595.850774][ T1134] Not tainted 5.6.0-rc7-syzkaller #0 [ 595.850779][ T1134] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 595.850784][ T1134] syz-executor718 D28392 7103 7096 0x20020004 [ 595.850804][ T1134] Call Trace: [ 595.850825][ T1134] ? __schedule+0x934/0x1f90 [ 595.850850][ T1134] ? __sched_text_start+0x8/0x8 [ 595.850880][ T1134] schedule+0xd0/0x2a0 [ 595.850904][ T1134] schedule_preempt_disabled+0xf/0x20 [ 595.850917][ T1134] __mutex_lock+0x7ab/0x13c0 [ 595.850934][ T1134] ? fb_open+0xd3/0x430 [ 595.850957][ T1134] ? mutex_trylock+0x2c0/0x2c0 [ 595.850979][ T1134] ? __mutex_unlock_slowpath+0xe2/0x660 [ 595.850992][ T1134] ? chrdev_open+0xc4/0x5c0 [ 595.851013][ T1134] ? lock_downgrade+0x7f0/0x7f0 [ 595.851040][ T1134] ? fb_open+0xd3/0x430 [ 595.851050][ T1134] fb_open+0xd3/0x430 [ 595.851067][ T1134] ? get_fb_info.part.0+0x80/0x80 [ 595.851080][ T1134] chrdev_open+0x219/0x5c0 [ 595.851094][ T1134] ? rwlock_bug.part.0+0x90/0x90 [ 595.851108][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.851138][ T1134] do_dentry_open+0x4a2/0x1250 [ 595.851155][ T1134] ? cdev_put.part.0+0x50/0x50 [ 595.851173][ T1134] ? security_inode_permission+0xc4/0xf0 [ 595.851187][ T1134] ? chown_common+0x550/0x550 [ 595.851201][ T1134] ? inode_permission+0xab/0x500 [ 595.851227][ T1134] path_openat+0x122a/0x32b0 [ 595.851264][ T1134] ? path_mountpoint.isra.0+0x370/0x370 [ 595.851285][ T1134] ? __lock_acquire+0x14bd/0x3ca0 [ 595.851314][ T1134] do_filp_open+0x192/0x260 [ 595.851331][ T1134] ? may_open_dev+0xf0/0xf0 [ 595.851359][ T1134] ? do_raw_spin_lock+0x129/0x2e0 [ 595.851390][ T1134] ? _raw_spin_unlock+0x24/0x40 [ 595.851403][ T1134] ? __alloc_fd+0x46d/0x600 [ 595.851432][ T1134] do_sys_openat2+0x54c/0x740 [ 595.851452][ T1134] ? file_open_root+0x3d0/0x3d0 [ 595.851487][ T1134] do_sys_open+0xc3/0x140 [ 595.851501][ T1134] ? filp_open+0x70/0x70 [ 595.851521][ T1134] ? fpregs_mark_activate+0x320/0x320 [ 595.851538][ T1134] ? trace_hardirqs_off_caller+0x55/0x230 [ 595.851562][ T1134] do_fast_syscall_32+0x270/0xe8f [ 595.851583][ T1134] entry_SYSENTER_compat+0x70/0x7f [ 595.851615][ T1134] [ 595.851615][ T1134] Showing all locks held in the system: [ 595.851628][ T1134] 1 lock held by khungtaskd/1134: [ 595.851632][ T1134] #0: ffffffff897accc0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x260 [ 595.851691][ T1134] 1 lock held by in:imklog/6704: [ 595.851695][ T1134] #0: ffff8880a7585920 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 595.851725][ T1134] 2 locks held by syz-executor718/7094: [ 595.851734][ T1134] 1 lock held by syz-executor718/7099: [ 595.851738][ T1134] #0: ffff8880a4158070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 595.851764][ T1134] 1 lock held by syz-executor718/7100: [ 595.851768][ T1134] #0: ffff8880a4158070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 595.851794][ T1134] 1 lock held by syz-executor718/7101: [ 595.851798][ T1134] #0: ffff8880a4158070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 595.851824][ T1134] 1 lock held by syz-executor718/7102: [ 595.851828][ T1134] #0: ffff8880a4158070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 595.851853][ T1134] 1 lock held by syz-executor718/7103: [ 595.851858][ T1134] #0: ffff8880a4158070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 595.851879][ T1134] [ 595.851889][ T1134] ============================================= [ 595.851889][ T1134] [ 595.851895][ T1134] NMI backtrace for cpu 0 [ 595.851907][ T1134] CPU: 0 PID: 1134 Comm: khungtaskd Not tainted 5.6.0-rc7-syzkaller #0 [ 595.851914][ T1134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 595.851918][ T1134] Call Trace: [ 595.851996][ T1134] dump_stack+0x188/0x20d [ 595.852019][ T1134] nmi_cpu_backtrace.cold+0x70/0xb1 [ 595.852071][ T1134] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 595.852088][ T1134] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 595.852140][ T1134] watchdog+0xa8c/0x1010 [ 595.852164][ T1134] ? reset_hung_task_detector+0x30/0x30 [ 595.852199][ T1134] kthread+0x357/0x430 [ 595.852213][ T1134] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 595.852229][ T1134] ret_from_fork+0x24/0x30 [ 595.852263][ T1134] Sending NMI from CPU 0 to CPUs 1: [ 595.852926][ C1] NMI backtrace for cpu 1 [ 595.852932][ C1] CPU: 1 PID: 7094 Comm: syz-executor718 Not tainted 5.6.0-rc7-syzkaller #0 [ 595.852937][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 595.852941][ C1] RIP: 0010:__sanitizer_cov_trace_cmp4+0x4/0x20 [ 595.852951][ C1] Code: b6 f7 31 ff eb 80 48 8b 0c 24 0f b7 d6 0f b7 f7 bf 02 00 00 00 e9 6c ff ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 48 8b 0c 24 <89> f2 89 fe bf 04 00 00 00 e9 4e ff ff ff 0f 1f 40 00 66 2e 0f 1f [ 595.852954][ C1] RSP: 0018:ffffc900016e74b0 EFLAGS: 00000282 [ 595.852961][ C1] RAX: ffff8880a4596240 RBX: 0000000000000050 RCX: ffffffff83b77faa [ 595.852965][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000050 [ 595.852970][ C1] RBP: 0000000000000004 R08: ffff8880a4596240 R09: ffffed10148e58bc [ 595.852974][ C1] R10: ffffed10148e58bb R11: ffff8880a472c5df R12: ffff8880000a0004 [ 595.852979][ C1] R13: ffff8880000a0000 R14: 0000000000000000 R15: 00000000ebbaa94f [ 595.852984][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:0000000009fa9840 [ 595.852988][ C1] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 595.852993][ C1] CR2: 0000000020000180 CR3: 00000000a8d3a000 CR4: 00000000001406e0 [ 595.852997][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 595.853001][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 595.853004][ C1] Call Trace: [ 595.853007][ C1] vga16fb_fillrect+0x9da/0x1960 [ 595.853009][ C1] ? memcpy+0x35/0x50 [ 595.853012][ C1] bit_clear_margins+0x2d5/0x4a0 [ 595.853015][ C1] ? bit_bmove+0x210/0x210 [ 595.853019][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 595.853022][ C1] fbcon_clear_margins+0x1de/0x240 [ 595.853025][ C1] fbcon_switch+0xd1b/0x1740 [ 595.853028][ C1] ? fbcon_set_def_font+0x370/0x370 [ 595.853031][ C1] ? fbcon_cursor+0x477/0x650 [ 595.853034][ C1] ? bit_clear+0x4e0/0x4e0 [ 595.853037][ C1] ? is_console_locked+0x5/0x10 [ 595.853040][ C1] ? fbcon_set_origin+0x26/0x50 [ 595.853043][ C1] redraw_screen+0x2a8/0x770 [ 595.853046][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 595.853049][ C1] ? respond_string+0x290/0x290 [ 595.853052][ C1] ? fbcon_set_palette+0x3b1/0x4a0 [ 595.853055][ C1] fbcon_modechanged+0x5bd/0x780 [ 595.853058][ C1] fbcon_update_vcs+0x3a/0x50 [ 595.853061][ C1] fb_set_var+0xad0/0xd40 [ 595.853064][ C1] ? fb_blank+0x190/0x190 [ 595.853066][ C1] ? do_fb_ioctl+0x348/0x7d0 [ 595.853069][ C1] ? lock_acquire+0x197/0x420 [ 595.853072][ C1] ? do_fb_ioctl+0x335/0x7d0 [ 595.853075][ C1] do_fb_ioctl+0x390/0x7d0 [ 595.853078][ C1] ? fb_mmap+0x550/0x550 [ 595.853081][ C1] ? lock_downgrade+0x7f0/0x7f0 [ 595.853084][ C1] ? quarantine_put+0x119/0x1c0 [ 595.853086][ C1] ? kfree+0x1eb/0x2b0 [ 595.853090][ C1] ? tomoyo_path_number_perm+0x411/0x4d0 [ 595.853093][ C1] ? lockdep_hardirqs_on+0x417/0x5d0 [ 595.853096][ C1] ? tomoyo_path_number_perm+0x238/0x4d0 [ 595.853100][ C1] ? tomoyo_execute_permission+0x470/0x470 [ 595.853103][ C1] ? trace_hardirqs_off+0x50/0x220 [ 595.853106][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 595.853109][ C1] ? do_vfs_ioctl+0x506/0x12c0 [ 595.853112][ C1] fb_compat_ioctl+0x305/0xc50 [ 595.853115][ C1] ? fb_release+0x140/0x140 [ 595.853118][ C1] ? do_sys_open+0xc3/0x140 [ 595.853121][ C1] ? fb_release+0x140/0x140 [ 595.853124][ C1] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 595.853127][ C1] do_fast_syscall_32+0x270/0xe8f [ 595.853131][ C1] entry_SYSENTER_compat+0x70/0x7f [ 595.866745][ T1134] Kernel panic - not syncing: hung_task: blocked tasks [ 595.866760][ T1134] CPU: 0 PID: 1134 Comm: khungtaskd Not tainted 5.6.0-rc7-syzkaller #0 [ 595.866768][ T1134] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 595.866772][ T1134] Call Trace: [ 595.866794][ T1134] dump_stack+0x188/0x20d [ 595.866876][ T1134] panic+0x2e3/0x75c [ 595.866896][ T1134] ? add_taint.cold+0x16/0x16 [ 595.866918][ T1134] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 595.866933][ T1134] ? ___preempt_schedule+0x16/0x18 [ 595.866952][ T1134] ? watchdog+0xa8c/0x1010 [ 595.866967][ T1134] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 595.866987][ T1134] watchdog+0xa9d/0x1010 [ 595.867011][ T1134] ? reset_hung_task_detector+0x30/0x30 [ 595.867027][ T1134] kthread+0x357/0x430 [ 595.867040][ T1134] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 595.867058][ T1134] ret_from_fork+0x24/0x30 [ 595.868559][ T1134] Kernel Offset: disabled [ 597.537745][ T1134] Rebooting in 86400 seconds..