Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 554.873604][ T1133] INFO: task syz-executor411:7050 blocked for more than 143 seconds. [ 554.873626][ T1133] Not tainted 5.7.0-rc2-syzkaller #0 [ 554.873632][ T1133] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 554.873639][ T1133] syz-executor411 D28488 7050 7048 0x20020004 [ 554.873663][ T1133] Call Trace: [ 554.873901][ T1133] ? __schedule+0x937/0x1ff0 [ 554.873925][ T1133] ? __sched_text_start+0x8/0x8 [ 554.873952][ T1133] schedule+0xd0/0x2a0 [ 554.873972][ T1133] schedule_preempt_disabled+0xf/0x20 [ 554.873985][ T1133] __mutex_lock+0x7ab/0x13c0 [ 554.874027][ T1133] ? fb_open+0xd3/0x430 [ 554.874045][ T1133] ? mutex_trylock+0x2c0/0x2c0 [ 554.874064][ T1133] ? __mutex_unlock_slowpath+0xe2/0x660 [ 554.874125][ T1133] ? chrdev_open+0xc4/0x5c0 [ 554.874152][ T1133] ? lock_downgrade+0x840/0x840 [ 554.874174][ T1133] ? fb_open+0xd3/0x430 [ 554.874186][ T1133] fb_open+0xd3/0x430 [ 554.874203][ T1133] ? get_fb_info.part.0+0x80/0x80 [ 554.874216][ T1133] chrdev_open+0x219/0x5c0 [ 554.874232][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.874269][ T1133] ? security_file_open+0x84/0x410 [ 554.874288][ T1133] do_dentry_open+0x4ba/0x1290 [ 554.874304][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.874352][ T1133] ? security_inode_permission+0xc4/0xf0 [ 554.874366][ T1133] ? chown_common+0x550/0x550 [ 554.874383][ T1133] ? inode_permission+0xab/0x500 [ 554.874405][ T1133] path_openat+0x1e59/0x27d0 [ 554.874429][ T1133] ? path_lookupat.isra.0+0x530/0x530 [ 554.874459][ T1133] do_filp_open+0x192/0x260 [ 554.874475][ T1133] ? may_open_dev+0xf0/0xf0 [ 554.874520][ T1133] ? do_raw_spin_lock+0x129/0x2e0 [ 554.874569][ T1133] ? _raw_spin_unlock+0x24/0x40 [ 554.874609][ T1133] ? __alloc_fd+0x46d/0x600 [ 554.874632][ T1133] do_sys_openat2+0x585/0x7d0 [ 554.874650][ T1133] ? file_open_root+0x400/0x400 [ 554.874677][ T1133] do_sys_open+0xc3/0x140 [ 554.874692][ T1133] ? filp_open+0x70/0x70 [ 554.874738][ T1133] ? fpregs_mark_activate+0x320/0x320 [ 554.874760][ T1133] ? trace_hardirqs_off_caller+0x55/0x230 [ 554.874809][ T1133] do_fast_syscall_32+0x270/0xe90 [ 554.874830][ T1133] entry_SYSENTER_compat+0x70/0x7f [ 554.874864][ T1133] INFO: task syz-executor411:7051 blocked for more than 143 seconds. [ 554.874873][ T1133] Not tainted 5.7.0-rc2-syzkaller #0 [ 554.874878][ T1133] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 554.874885][ T1133] syz-executor411 D28288 7051 7047 0x20024004 [ 554.874907][ T1133] Call Trace: [ 554.874928][ T1133] ? __schedule+0x937/0x1ff0 [ 554.874951][ T1133] ? __sched_text_start+0x8/0x8 [ 554.874977][ T1133] schedule+0xd0/0x2a0 [ 554.874996][ T1133] schedule_preempt_disabled+0xf/0x20 [ 554.875008][ T1133] __mutex_lock+0x7ab/0x13c0 [ 554.875024][ T1133] ? fb_open+0xd3/0x430 [ 554.875043][ T1133] ? mutex_trylock+0x2c0/0x2c0 [ 554.875061][ T1133] ? __mutex_unlock_slowpath+0xe2/0x660 [ 554.875074][ T1133] ? chrdev_open+0xc4/0x5c0 [ 554.875093][ T1133] ? lock_downgrade+0x840/0x840 [ 554.875115][ T1133] ? fb_open+0xd3/0x430 [ 554.875127][ T1133] fb_open+0xd3/0x430 [ 554.875143][ T1133] ? get_fb_info.part.0+0x80/0x80 [ 554.875156][ T1133] chrdev_open+0x219/0x5c0 [ 554.875172][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.875190][ T1133] ? security_file_open+0x84/0x410 [ 554.875207][ T1133] do_dentry_open+0x4ba/0x1290 [ 554.875223][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.875242][ T1133] ? security_inode_permission+0xc4/0xf0 [ 554.875255][ T1133] ? chown_common+0x550/0x550 [ 554.875272][ T1133] ? inode_permission+0xab/0x500 [ 554.875293][ T1133] path_openat+0x1e59/0x27d0 [ 554.875318][ T1133] ? path_lookupat.isra.0+0x530/0x530 [ 554.875347][ T1133] do_filp_open+0x192/0x260 [ 554.875362][ T1133] ? may_open_dev+0xf0/0xf0 [ 554.875384][ T1133] ? do_raw_spin_lock+0x129/0x2e0 [ 554.875409][ T1133] ? _raw_spin_unlock+0x24/0x40 [ 554.875423][ T1133] ? __alloc_fd+0x46d/0x600 [ 554.875446][ T1133] do_sys_openat2+0x585/0x7d0 [ 554.875463][ T1133] ? file_open_root+0x400/0x400 [ 554.875490][ T1133] do_sys_open+0xc3/0x140 [ 554.875504][ T1133] ? filp_open+0x70/0x70 [ 554.875524][ T1133] ? fpregs_mark_activate+0x320/0x320 [ 554.875539][ T1133] ? trace_hardirqs_off_caller+0x55/0x230 [ 554.875562][ T1133] do_fast_syscall_32+0x270/0xe90 [ 554.875582][ T1133] entry_SYSENTER_compat+0x70/0x7f [ 554.875609][ T1133] INFO: task syz-executor411:7052 blocked for more than 143 seconds. [ 554.875617][ T1133] Not tainted 5.7.0-rc2-syzkaller #0 [ 554.875623][ T1133] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 554.875629][ T1133] syz-executor411 D27840 7052 7044 0x20020004 [ 554.875649][ T1133] Call Trace: [ 554.875669][ T1133] ? __schedule+0x937/0x1ff0 [ 554.875692][ T1133] ? __sched_text_start+0x8/0x8 [ 554.875718][ T1133] schedule+0xd0/0x2a0 [ 554.875737][ T1133] schedule_preempt_disabled+0xf/0x20 [ 554.875749][ T1133] __mutex_lock+0x7ab/0x13c0 [ 554.875765][ T1133] ? fb_open+0xd3/0x430 [ 554.875783][ T1133] ? mutex_trylock+0x2c0/0x2c0 [ 554.875801][ T1133] ? __mutex_unlock_slowpath+0xe2/0x660 [ 554.875814][ T1133] ? chrdev_open+0xc4/0x5c0 [ 554.875834][ T1133] ? lock_downgrade+0x840/0x840 [ 554.875862][ T1133] ? fb_open+0xd3/0x430 [ 554.875874][ T1133] fb_open+0xd3/0x430 [ 554.875890][ T1133] ? get_fb_info.part.0+0x80/0x80 [ 554.875903][ T1133] chrdev_open+0x219/0x5c0 [ 554.875919][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.875936][ T1133] ? security_file_open+0x84/0x410 [ 554.875954][ T1133] do_dentry_open+0x4ba/0x1290 [ 554.875970][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.875989][ T1133] ? security_inode_permission+0xc4/0xf0 [ 554.876003][ T1133] ? chown_common+0x550/0x550 [ 554.876019][ T1133] ? inode_permission+0xab/0x500 [ 554.876040][ T1133] path_openat+0x1e59/0x27d0 [ 554.876065][ T1133] ? path_lookupat.isra.0+0x530/0x530 [ 554.876095][ T1133] do_filp_open+0x192/0x260 [ 554.876110][ T1133] ? may_open_dev+0xf0/0xf0 [ 554.876132][ T1133] ? do_raw_spin_lock+0x129/0x2e0 [ 554.876166][ T1133] ? _raw_spin_unlock+0x24/0x40 [ 554.876180][ T1133] ? __alloc_fd+0x46d/0x600 [ 554.876202][ T1133] do_sys_openat2+0x585/0x7d0 [ 554.876220][ T1133] ? file_open_root+0x400/0x400 [ 554.876247][ T1133] do_sys_open+0xc3/0x140 [ 554.876261][ T1133] ? filp_open+0x70/0x70 [ 554.876281][ T1133] ? fpregs_mark_activate+0x320/0x320 [ 554.876296][ T1133] ? trace_hardirqs_off_caller+0x55/0x230 [ 554.876318][ T1133] do_fast_syscall_32+0x270/0xe90 [ 554.876339][ T1133] entry_SYSENTER_compat+0x70/0x7f [ 554.876365][ T1133] INFO: task syz-executor411:7053 blocked for more than 143 seconds. [ 554.876373][ T1133] Not tainted 5.7.0-rc2-syzkaller #0 [ 554.876378][ T1133] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 554.876384][ T1133] syz-executor411 D28208 7053 7049 0x20020004 [ 554.876406][ T1133] Call Trace: [ 554.876426][ T1133] ? __schedule+0x937/0x1ff0 [ 554.876454][ T1133] ? __sched_text_start+0x8/0x8 [ 554.876481][ T1133] schedule+0xd0/0x2a0 [ 554.876500][ T1133] schedule_preempt_disabled+0xf/0x20 [ 554.876512][ T1133] __mutex_lock+0x7ab/0x13c0 [ 554.876528][ T1133] ? fb_open+0xd3/0x430 [ 554.876546][ T1133] ? mutex_trylock+0x2c0/0x2c0 [ 554.876564][ T1133] ? __mutex_unlock_slowpath+0xe2/0x660 [ 554.876577][ T1133] ? chrdev_open+0xc4/0x5c0 [ 554.876598][ T1133] ? lock_downgrade+0x840/0x840 [ 554.876619][ T1133] ? fb_open+0xd3/0x430 [ 554.876631][ T1133] fb_open+0xd3/0x430 [ 554.876648][ T1133] ? get_fb_info.part.0+0x80/0x80 [ 554.876661][ T1133] chrdev_open+0x219/0x5c0 [ 554.876677][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.876694][ T1133] ? security_file_open+0x84/0x410 [ 554.876712][ T1133] do_dentry_open+0x4ba/0x1290 [ 554.876728][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.876747][ T1133] ? security_inode_permission+0xc4/0xf0 [ 554.876760][ T1133] ? chown_common+0x550/0x550 [ 554.876777][ T1133] ? inode_permission+0xab/0x500 [ 554.876798][ T1133] path_openat+0x1e59/0x27d0 [ 554.876823][ T1133] ? path_lookupat.isra.0+0x530/0x530 [ 554.876857][ T1133] do_filp_open+0x192/0x260 [ 554.876873][ T1133] ? may_open_dev+0xf0/0xf0 [ 554.876895][ T1133] ? do_raw_spin_lock+0x129/0x2e0 [ 554.876921][ T1133] ? _raw_spin_unlock+0x24/0x40 [ 554.876934][ T1133] ? __alloc_fd+0x46d/0x600 [ 554.876957][ T1133] do_sys_openat2+0x585/0x7d0 [ 554.876974][ T1133] ? file_open_root+0x400/0x400 [ 554.877001][ T1133] do_sys_open+0xc3/0x140 [ 554.877016][ T1133] ? filp_open+0x70/0x70 [ 554.877036][ T1133] ? fpregs_mark_activate+0x320/0x320 [ 554.877051][ T1133] ? trace_hardirqs_off_caller+0x55/0x230 [ 554.877073][ T1133] do_fast_syscall_32+0x270/0xe90 [ 554.877094][ T1133] entry_SYSENTER_compat+0x70/0x7f [ 554.877120][ T1133] INFO: task syz-executor411:7054 blocked for more than 143 seconds. [ 554.877128][ T1133] Not tainted 5.7.0-rc2-syzkaller #0 [ 554.877134][ T1133] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 554.877140][ T1133] syz-executor411 D28448 7054 7046 0x20020004 [ 554.877161][ T1133] Call Trace: [ 554.877181][ T1133] ? __schedule+0x937/0x1ff0 [ 554.877204][ T1133] ? __sched_text_start+0x8/0x8 [ 554.877230][ T1133] schedule+0xd0/0x2a0 [ 554.877249][ T1133] schedule_preempt_disabled+0xf/0x20 [ 554.877261][ T1133] __mutex_lock+0x7ab/0x13c0 [ 554.877277][ T1133] ? fb_open+0xd3/0x430 [ 554.877295][ T1133] ? mutex_trylock+0x2c0/0x2c0 [ 554.877313][ T1133] ? __mutex_unlock_slowpath+0xe2/0x660 [ 554.877326][ T1133] ? chrdev_open+0xc4/0x5c0 [ 554.877345][ T1133] ? lock_downgrade+0x840/0x840 [ 554.877368][ T1133] ? fb_open+0xd3/0x430 [ 554.877380][ T1133] fb_open+0xd3/0x430 [ 554.877396][ T1133] ? get_fb_info.part.0+0x80/0x80 [ 554.877409][ T1133] chrdev_open+0x219/0x5c0 [ 554.877425][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.877442][ T1133] ? security_file_open+0x84/0x410 [ 554.877460][ T1133] do_dentry_open+0x4ba/0x1290 [ 554.877476][ T1133] ? cdev_put.part.0+0x50/0x50 [ 554.877495][ T1133] ? security_inode_permission+0xc4/0xf0 [ 554.877509][ T1133] ? chown_common+0x550/0x550 [ 554.877525][ T1133] ? inode_permission+0xab/0x500 [ 554.877546][ T1133] path_openat+0x1e59/0x27d0 [ 554.877571][ T1133] ? path_lookupat.isra.0+0x530/0x530 [ 554.877590][ T1133] ? lock_acquire+0x1f2/0x8f0 [ 554.877613][ T1133] do_filp_open+0x192/0x260 [ 554.877628][ T1133] ? may_open_dev+0xf0/0xf0 [ 554.877650][ T1133] ? do_raw_spin_lock+0x129/0x2e0 [ 554.877676][ T1133] ? _raw_spin_unlock+0x24/0x40 [ 554.877690][ T1133] ? __alloc_fd+0x46d/0x600 [ 554.877713][ T1133] do_sys_openat2+0x585/0x7d0 [ 554.877729][ T1133] ? file_open_root+0x400/0x400 [ 554.877756][ T1133] do_sys_open+0xc3/0x140 [ 554.877770][ T1133] ? filp_open+0x70/0x70 [ 554.877790][ T1133] ? fpregs_mark_activate+0x320/0x320 [ 554.877806][ T1133] ? trace_hardirqs_off_caller+0x55/0x230 [ 554.877828][ T1133] do_fast_syscall_32+0x270/0xe90 [ 554.877853][ T1133] entry_SYSENTER_compat+0x70/0x7f [ 554.877875][ T1133] [ 554.877875][ T1133] Showing all locks held in the system: [ 554.877891][ T1133] 1 lock held by khungtaskd/1133: [ 554.877896][ T1133] #0: ffffffff899beb00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 554.877961][ T1133] 1 lock held by in:imklog/6712: [ 554.877966][ T1133] #0: ffff8880a3486170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 554.878002][ T1133] 2 locks held by syz-executor411/7045: [ 554.878012][ T1133] 1 lock held by syz-executor411/7050: [ 554.878016][ T1133] #0: ffff8880a348b078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 554.878047][ T1133] 1 lock held by syz-executor411/7051: [ 554.878052][ T1133] #0: ffff8880a348b078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 554.878083][ T1133] 1 lock held by syz-executor411/7052: [ 554.878088][ T1133] #0: ffff8880a348b078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 554.878118][ T1133] 1 lock held by syz-executor411/7053: [ 554.878123][ T1133] #0: ffff8880a348b078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 554.878154][ T1133] 1 lock held by syz-executor411/7054: [ 554.878158][ T1133] #0: ffff8880a348b078 (&fb_info->lock){+.+.}-{3:3}, at: fb_open+0xd3/0x430 [ 554.878185][ T1133] [ 554.878190][ T1133] ============================================= [ 554.878190][ T1133] [ 554.878198][ T1133] NMI backtrace for cpu 0 [ 554.878212][ T1133] CPU: 0 PID: 1133 Comm: khungtaskd Not tainted 5.7.0-rc2-syzkaller #0 [ 554.878220][ T1133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 554.878225][ T1133] Call Trace: [ 554.878286][ T1133] dump_stack+0x188/0x20d [ 554.878305][ T1133] nmi_cpu_backtrace.cold+0x70/0xb1 [ 554.878341][ T1133] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 554.878355][ T1133] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 554.878394][ T1133] watchdog+0xa8c/0x1010 [ 554.878413][ T1133] ? reset_hung_task_detector+0x30/0x30 [ 554.878451][ T1133] kthread+0x388/0x470 [ 554.878465][ T1133] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 554.878482][ T1133] ret_from_fork+0x24/0x30 [ 554.878507][ T1133] Sending NMI from CPU 0 to CPUs 1: [ 554.879175][ C1] NMI backtrace for cpu 1 [ 554.879180][ C1] CPU: 1 PID: 7045 Comm: syz-executor411 Not tainted 5.7.0-rc2-syzkaller #0 [ 554.879186][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 554.879190][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x22/0x50 [ 554.879199][ C1] Code: 0f 1f 84 00 00 00 00 00 65 48 8b 04 25 00 1f 02 00 65 8b 15 28 f0 8e 7e 81 e2 00 01 1f 00 48 8b 34 24 75 2b 8b 90 d8 13 00 00 <83> fa 02 75 20 48 8b 88 e0 13 00 00 8b 80 dc 13 00 00 48 8b 11 48 [ 554.879203][ C1] RSP: 0018:ffffc900018074b0 EFLAGS: 00000246 [ 554.879210][ C1] RAX: ffff8880946ba4c0 RBX: 0000000000000050 RCX: ffffffff83c3610a [ 554.879214][ C1] RDX: 0000000000000000 RSI: ffffffff83c360f6 RDI: 0000000000000004 [ 554.879218][ C1] RBP: 0000000000000007 R08: ffff8880946ba4c0 R09: ffffed1014699d64 [ 554.879223][ C1] R10: ffff8880a34ceb1f R11: ffffed1014699d63 R12: ffff8880000a0007 [ 554.879227][ C1] R13: ffff8880000a0000 R14: 0000000000000000 R15: 00000000e8d03172 [ 554.879232][ C1] FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:0000000009024840 [ 554.879236][ C1] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 554.879241][ C1] CR2: 0000000020000180 CR3: 000000009b2c4000 CR4: 00000000001406e0 [ 554.879245][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 554.879249][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 554.879252][ C1] Call Trace: [ 554.879255][ C1] vga16fb_fillrect+0x9c6/0x1960 [ 554.879258][ C1] ? memcpy+0x39/0x60 [ 554.879261][ C1] bit_clear_margins+0x2d5/0x4a0 [ 554.879264][ C1] ? bit_bmove+0x210/0x210 [ 554.879267][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 554.879270][ C1] fbcon_clear_margins+0x1de/0x240 [ 554.879273][ C1] fbcon_switch+0xd21/0x1740 [ 554.879276][ C1] ? fbcon_set_def_font+0x370/0x370 [ 554.879279][ C1] ? fbcon_cursor+0x477/0x650 [ 554.879282][ C1] ? bit_clear+0x4e0/0x4e0 [ 554.879285][ C1] ? is_console_locked+0x5/0x10 [ 554.879288][ C1] ? fbcon_set_origin+0x26/0x50 [ 554.879291][ C1] redraw_screen+0x2ae/0x770 [ 554.879295][ C1] ? vesafb_probe.cold+0x1162/0x1162 [ 554.879298][ C1] ? respond_string+0x290/0x290 [ 554.879301][ C1] ? fbcon_set_palette+0x3b1/0x4a0 [ 554.879304][ C1] fbcon_modechanged+0x5c3/0x790 [ 554.879307][ C1] fbcon_update_vcs+0x3a/0x50 [ 554.879310][ C1] fb_set_var+0xad0/0xd40 [ 554.879313][ C1] ? fb_blank+0x190/0x190 [ 554.879316][ C1] ? mark_held_locks+0xe0/0xe0 [ 554.879319][ C1] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 554.879322][ C1] do_fb_ioctl+0x390/0x6e0 [ 554.879325][ C1] ? fb_mmap+0x550/0x550 [ 554.879328][ C1] ? lock_downgrade+0x840/0x840 [ 554.879331][ C1] ? quarantine_put+0x119/0x1c0 [ 554.879334][ C1] ? kfree+0x1eb/0x2b0 [ 554.879337][ C1] ? tomoyo_path_number_perm+0x411/0x4d0 [ 554.879341][ C1] ? lockdep_hardirqs_on+0x463/0x620 [ 554.879349][ C1] ? tomoyo_path_number_perm+0x238/0x4d0 [ 554.879352][ C1] ? tomoyo_execute_permission+0x470/0x470 [ 554.879356][ C1] ? trace_hardirqs_off+0x50/0x220 [ 554.879359][ C1] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 554.879362][ C1] ? do_vfs_ioctl+0x50c/0x12d0 [ 554.879365][ C1] fb_compat_ioctl+0x305/0xc50 [ 554.879368][ C1] ? fb_release+0x140/0x140 [ 554.879371][ C1] ? do_sys_open+0xc3/0x140 [ 554.879374][ C1] ? fb_release+0x140/0x140 [ 554.879378][ C1] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 554.879381][ C1] do_fast_syscall_32+0x270/0xe90 [ 554.879384][ C1] entry_SYSENTER_compat+0x70/0x7f [ 554.879525][ T1133] Kernel panic - not syncing: hung_task: blocked tasks [ 554.879536][ T1133] CPU: 0 PID: 1133 Comm: khungtaskd Not tainted 5.7.0-rc2-syzkaller #0 [ 554.879542][ T1133] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 554.879545][ T1133] Call Trace: [ 554.879558][ T1133] dump_stack+0x188/0x20d [ 554.879626][ T1133] panic+0x2e3/0x75c [ 554.879639][ T1133] ? add_taint.cold+0x16/0x16 [ 554.879654][ T1133] ? cpumask_next+0x3c/0x40 [ 554.879685][ T1133] ? printk_safe_flush+0xd9/0x120 [ 554.879696][ T1133] ? watchdog+0xa8c/0x1010 [ 554.879707][ T1133] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 554.879719][ T1133] watchdog+0xa9d/0x1010 [ 554.879735][ T1133] ? reset_hung_task_detector+0x30/0x30 [ 554.879749][ T1133] kthread+0x388/0x470 [ 554.879762][ T1133] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 554.879776][ T1133] ret_from_fork+0x24/0x30 [ 554.881316][ T1133] Kernel Offset: disabled [ 556.540378][ T1133] Rebooting in 86400 seconds..