Warning: Permanently added '10.128.0.135' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 581.169837][ T1090] INFO: task syz-executor300:9439 blocked for more than 143 seconds. [ 581.169857][ T1090] Not tainted 5.6.0-rc6-syzkaller #0 [ 581.169862][ T1090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 581.169869][ T1090] syz-executor300 D28392 9439 9438 0x20020004 [ 581.169891][ T1090] Call Trace: [ 581.170159][ T1090] ? __schedule+0x934/0x1f90 [ 581.170187][ T1090] ? __sched_text_start+0x8/0x8 [ 581.170218][ T1090] schedule+0xd0/0x2a0 [ 581.170239][ T1090] schedule_preempt_disabled+0xf/0x20 [ 581.170252][ T1090] __mutex_lock+0x7ab/0x13c0 [ 581.170329][ T1090] ? fb_open+0xd3/0x430 [ 581.170353][ T1090] ? mutex_trylock+0x2c0/0x2c0 [ 581.170376][ T1090] ? __mutex_unlock_slowpath+0xe2/0x660 [ 581.170462][ T1090] ? chrdev_open+0xc4/0x5c0 [ 581.170510][ T1090] ? lock_downgrade+0x7f0/0x7f0 [ 581.170539][ T1090] ? fb_open+0xd3/0x430 [ 581.170550][ T1090] fb_open+0xd3/0x430 [ 581.170567][ T1090] ? get_fb_info.part.0+0x80/0x80 [ 581.170581][ T1090] chrdev_open+0x219/0x5c0 [ 581.170596][ T1090] ? rwlock_bug.part.0+0x90/0x90 [ 581.170610][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.170641][ T1090] do_dentry_open+0x4a2/0x1250 [ 581.170659][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.170704][ T1090] ? security_inode_permission+0xc4/0xf0 [ 581.170719][ T1090] ? chown_common+0x550/0x550 [ 581.170733][ T1090] ? inode_permission+0xab/0x500 [ 581.170759][ T1090] path_openat+0x122a/0x32b0 [ 581.170797][ T1090] ? path_mountpoint.isra.0+0x370/0x370 [ 581.170818][ T1090] ? __lock_acquire+0x14bd/0x3ca0 [ 581.170848][ T1090] do_filp_open+0x192/0x260 [ 581.170865][ T1090] ? may_open_dev+0xf0/0xf0 [ 581.170894][ T1090] ? do_raw_spin_lock+0x129/0x2e0 [ 581.170926][ T1090] ? _raw_spin_unlock+0x24/0x40 [ 581.170965][ T1090] ? __alloc_fd+0x46d/0x600 [ 581.170995][ T1090] do_sys_openat2+0x54c/0x740 [ 581.171015][ T1090] ? file_open_root+0x3d0/0x3d0 [ 581.171050][ T1090] do_sys_open+0xc3/0x140 [ 581.171071][ T1090] ? filp_open+0x70/0x70 [ 581.171113][ T1090] ? fpregs_mark_activate+0x320/0x320 [ 581.171152][ T1090] ? trace_hardirqs_off_caller+0x55/0x230 [ 581.171187][ T1090] do_fast_syscall_32+0x270/0xe8f [ 581.171235][ T1090] entry_SYSENTER_compat+0x70/0x7f [ 581.171272][ T1090] INFO: task syz-executor300:9440 blocked for more than 143 seconds. [ 581.171280][ T1090] Not tainted 5.6.0-rc6-syzkaller #0 [ 581.171286][ T1090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 581.171292][ T1090] syz-executor300 D28392 9440 9435 0x20024004 [ 581.171313][ T1090] Call Trace: [ 581.171334][ T1090] ? __schedule+0x934/0x1f90 [ 581.171359][ T1090] ? __sched_text_start+0x8/0x8 [ 581.171390][ T1090] schedule+0xd0/0x2a0 [ 581.171408][ T1090] schedule_preempt_disabled+0xf/0x20 [ 581.171421][ T1090] __mutex_lock+0x7ab/0x13c0 [ 581.171439][ T1090] ? fb_open+0xd3/0x430 [ 581.171462][ T1090] ? mutex_trylock+0x2c0/0x2c0 [ 581.171484][ T1090] ? __mutex_unlock_slowpath+0xe2/0x660 [ 581.171497][ T1090] ? chrdev_open+0xc4/0x5c0 [ 581.171518][ T1090] ? lock_downgrade+0x7f0/0x7f0 [ 581.171545][ T1090] ? fb_open+0xd3/0x430 [ 581.171556][ T1090] fb_open+0xd3/0x430 [ 581.171573][ T1090] ? get_fb_info.part.0+0x80/0x80 [ 581.171586][ T1090] chrdev_open+0x219/0x5c0 [ 581.171600][ T1090] ? rwlock_bug.part.0+0x90/0x90 [ 581.171614][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.171645][ T1090] do_dentry_open+0x4a2/0x1250 [ 581.171662][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.171681][ T1090] ? security_inode_permission+0xc4/0xf0 [ 581.171695][ T1090] ? chown_common+0x550/0x550 [ 581.171709][ T1090] ? inode_permission+0xab/0x500 [ 581.171735][ T1090] path_openat+0x122a/0x32b0 [ 581.171771][ T1090] ? path_mountpoint.isra.0+0x370/0x370 [ 581.171793][ T1090] ? __lock_acquire+0x14bd/0x3ca0 [ 581.171822][ T1090] do_filp_open+0x192/0x260 [ 581.171839][ T1090] ? may_open_dev+0xf0/0xf0 [ 581.171867][ T1090] ? do_raw_spin_lock+0x129/0x2e0 [ 581.171899][ T1090] ? _raw_spin_unlock+0x24/0x40 [ 581.171912][ T1090] ? __alloc_fd+0x46d/0x600 [ 581.171942][ T1090] do_sys_openat2+0x54c/0x740 [ 581.171961][ T1090] ? file_open_root+0x3d0/0x3d0 [ 581.171997][ T1090] do_sys_open+0xc3/0x140 [ 581.172011][ T1090] ? filp_open+0x70/0x70 [ 581.172031][ T1090] ? fpregs_mark_activate+0x320/0x320 [ 581.172048][ T1090] ? trace_hardirqs_off_caller+0x55/0x230 [ 581.172078][ T1090] do_fast_syscall_32+0x270/0xe8f [ 581.172100][ T1090] entry_SYSENTER_compat+0x70/0x7f [ 581.172136][ T1090] INFO: task syz-executor300:9441 blocked for more than 143 seconds. [ 581.172143][ T1090] Not tainted 5.6.0-rc6-syzkaller #0 [ 581.172148][ T1090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 581.172154][ T1090] syz-executor300 D28336 9441 9437 0x20020004 [ 581.172172][ T1090] Call Trace: [ 581.172193][ T1090] ? __schedule+0x934/0x1f90 [ 581.172218][ T1090] ? __sched_text_start+0x8/0x8 [ 581.172248][ T1090] schedule+0xd0/0x2a0 [ 581.172267][ T1090] schedule_preempt_disabled+0xf/0x20 [ 581.172280][ T1090] __mutex_lock+0x7ab/0x13c0 [ 581.172297][ T1090] ? fb_open+0xd3/0x430 [ 581.172320][ T1090] ? mutex_trylock+0x2c0/0x2c0 [ 581.172342][ T1090] ? __mutex_unlock_slowpath+0xe2/0x660 [ 581.172355][ T1090] ? chrdev_open+0xc4/0x5c0 [ 581.172376][ T1090] ? lock_downgrade+0x7f0/0x7f0 [ 581.172403][ T1090] ? fb_open+0xd3/0x430 [ 581.172414][ T1090] fb_open+0xd3/0x430 [ 581.172431][ T1090] ? get_fb_info.part.0+0x80/0x80 [ 581.172444][ T1090] chrdev_open+0x219/0x5c0 [ 581.172458][ T1090] ? rwlock_bug.part.0+0x90/0x90 [ 581.172473][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.172503][ T1090] do_dentry_open+0x4a2/0x1250 [ 581.172520][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.172539][ T1090] ? security_inode_permission+0xc4/0xf0 [ 581.172553][ T1090] ? chown_common+0x550/0x550 [ 581.172566][ T1090] ? inode_permission+0xab/0x500 [ 581.172593][ T1090] path_openat+0x122a/0x32b0 [ 581.172629][ T1090] ? path_mountpoint.isra.0+0x370/0x370 [ 581.172650][ T1090] ? __lock_acquire+0x14bd/0x3ca0 [ 581.172679][ T1090] do_filp_open+0x192/0x260 [ 581.172696][ T1090] ? may_open_dev+0xf0/0xf0 [ 581.172725][ T1090] ? do_raw_spin_lock+0x129/0x2e0 [ 581.172756][ T1090] ? _raw_spin_unlock+0x24/0x40 [ 581.172770][ T1090] ? __alloc_fd+0x46d/0x600 [ 581.172798][ T1090] do_sys_openat2+0x54c/0x740 [ 581.172817][ T1090] ? file_open_root+0x3d0/0x3d0 [ 581.172853][ T1090] do_sys_open+0xc3/0x140 [ 581.172867][ T1090] ? filp_open+0x70/0x70 [ 581.172887][ T1090] ? fpregs_mark_activate+0x320/0x320 [ 581.172904][ T1090] ? trace_hardirqs_off_caller+0x55/0x230 [ 581.172939][ T1090] do_fast_syscall_32+0x270/0xe8f [ 581.172961][ T1090] entry_SYSENTER_compat+0x70/0x7f [ 581.172997][ T1090] INFO: task syz-executor300:9442 blocked for more than 143 seconds. [ 581.173004][ T1090] Not tainted 5.6.0-rc6-syzkaller #0 [ 581.173010][ T1090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 581.173015][ T1090] syz-executor300 D28048 9442 9433 0x20020004 [ 581.173035][ T1090] Call Trace: [ 581.173056][ T1090] ? __schedule+0x934/0x1f90 [ 581.173086][ T1090] ? __sched_text_start+0x8/0x8 [ 581.173117][ T1090] schedule+0xd0/0x2a0 [ 581.173136][ T1090] schedule_preempt_disabled+0xf/0x20 [ 581.173149][ T1090] __mutex_lock+0x7ab/0x13c0 [ 581.173166][ T1090] ? fb_open+0xd3/0x430 [ 581.173189][ T1090] ? mutex_trylock+0x2c0/0x2c0 [ 581.173211][ T1090] ? __mutex_unlock_slowpath+0xe2/0x660 [ 581.173224][ T1090] ? chrdev_open+0xc4/0x5c0 [ 581.173246][ T1090] ? lock_downgrade+0x7f0/0x7f0 [ 581.173273][ T1090] ? fb_open+0xd3/0x430 [ 581.173283][ T1090] fb_open+0xd3/0x430 [ 581.173300][ T1090] ? get_fb_info.part.0+0x80/0x80 [ 581.173313][ T1090] chrdev_open+0x219/0x5c0 [ 581.173327][ T1090] ? rwlock_bug.part.0+0x90/0x90 [ 581.173342][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.173372][ T1090] do_dentry_open+0x4a2/0x1250 [ 581.173389][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.173408][ T1090] ? security_inode_permission+0xc4/0xf0 [ 581.173422][ T1090] ? chown_common+0x550/0x550 [ 581.173436][ T1090] ? inode_permission+0xab/0x500 [ 581.173462][ T1090] path_openat+0x122a/0x32b0 [ 581.173498][ T1090] ? path_mountpoint.isra.0+0x370/0x370 [ 581.173520][ T1090] ? __lock_acquire+0x14bd/0x3ca0 [ 581.173549][ T1090] do_filp_open+0x192/0x260 [ 581.173565][ T1090] ? may_open_dev+0xf0/0xf0 [ 581.173595][ T1090] ? do_raw_spin_lock+0x129/0x2e0 [ 581.173626][ T1090] ? _raw_spin_unlock+0x24/0x40 [ 581.173640][ T1090] ? __alloc_fd+0x46d/0x600 [ 581.173669][ T1090] do_sys_openat2+0x54c/0x740 [ 581.173688][ T1090] ? file_open_root+0x3d0/0x3d0 [ 581.173724][ T1090] do_sys_open+0xc3/0x140 [ 581.173738][ T1090] ? filp_open+0x70/0x70 [ 581.173759][ T1090] ? fpregs_mark_activate+0x320/0x320 [ 581.173776][ T1090] ? trace_hardirqs_off_caller+0x55/0x230 [ 581.173800][ T1090] do_fast_syscall_32+0x270/0xe8f [ 581.173821][ T1090] entry_SYSENTER_compat+0x70/0x7f [ 581.173857][ T1090] INFO: task syz-executor300:9443 blocked for more than 143 seconds. [ 581.173864][ T1090] Not tainted 5.6.0-rc6-syzkaller #0 [ 581.173869][ T1090] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 581.173875][ T1090] syz-executor300 D28392 9443 9436 0x20020004 [ 581.173894][ T1090] Call Trace: [ 581.173915][ T1090] ? __schedule+0x934/0x1f90 [ 581.173940][ T1090] ? __sched_text_start+0x8/0x8 [ 581.173971][ T1090] schedule+0xd0/0x2a0 [ 581.173989][ T1090] schedule_preempt_disabled+0xf/0x20 [ 581.174002][ T1090] __mutex_lock+0x7ab/0x13c0 [ 581.174020][ T1090] ? fb_open+0xd3/0x430 [ 581.174043][ T1090] ? mutex_trylock+0x2c0/0x2c0 [ 581.174070][ T1090] ? __mutex_unlock_slowpath+0xe2/0x660 [ 581.174083][ T1090] ? chrdev_open+0xc4/0x5c0 [ 581.174105][ T1090] ? lock_downgrade+0x7f0/0x7f0 [ 581.174132][ T1090] ? fb_open+0xd3/0x430 [ 581.174142][ T1090] fb_open+0xd3/0x430 [ 581.174159][ T1090] ? get_fb_info.part.0+0x80/0x80 [ 581.174172][ T1090] chrdev_open+0x219/0x5c0 [ 581.174186][ T1090] ? rwlock_bug.part.0+0x90/0x90 [ 581.174200][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.174231][ T1090] do_dentry_open+0x4a2/0x1250 [ 581.174248][ T1090] ? cdev_put.part.0+0x50/0x50 [ 581.174266][ T1090] ? security_inode_permission+0xc4/0xf0 [ 581.174280][ T1090] ? chown_common+0x550/0x550 [ 581.174294][ T1090] ? inode_permission+0xab/0x500 [ 581.174320][ T1090] path_openat+0x122a/0x32b0 [ 581.174357][ T1090] ? path_mountpoint.isra.0+0x370/0x370 [ 581.174378][ T1090] ? __lock_acquire+0x14bd/0x3ca0 [ 581.174407][ T1090] do_filp_open+0x192/0x260 [ 581.174424][ T1090] ? may_open_dev+0xf0/0xf0 [ 581.174453][ T1090] ? do_raw_spin_lock+0x129/0x2e0 [ 581.174484][ T1090] ? _raw_spin_unlock+0x24/0x40 [ 581.174498][ T1090] ? __alloc_fd+0x46d/0x600 [ 581.174527][ T1090] do_sys_openat2+0x54c/0x740 [ 581.174546][ T1090] ? file_open_root+0x3d0/0x3d0 [ 581.174581][ T1090] do_sys_open+0xc3/0x140 [ 581.174596][ T1090] ? filp_open+0x70/0x70 [ 581.174616][ T1090] ? fpregs_mark_activate+0x320/0x320 [ 581.174633][ T1090] ? trace_hardirqs_off_caller+0x55/0x230 [ 581.174657][ T1090] do_fast_syscall_32+0x270/0xe8f [ 581.174679][ T1090] entry_SYSENTER_compat+0x70/0x7f [ 581.174711][ T1090] [ 581.174711][ T1090] Showing all locks held in the system: [ 581.174724][ T1090] 1 lock held by khungtaskd/1090: [ 581.174729][ T1090] #0: ffffffff897accc0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x260 [ 581.174783][ T1090] 1 lock held by rsyslogd/9316: [ 581.174787][ T1090] #0: ffff88809dd06d60 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 581.174815][ T1090] 2 locks held by getty/9406: [ 581.174819][ T1090] #0: ffff88809ece3090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.174872][ T1090] #1: ffffc9000198b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.174899][ T1090] 2 locks held by getty/9407: [ 581.174903][ T1090] #0: ffff8880996c1090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.174927][ T1090] #1: ffffc900019eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.174954][ T1090] 2 locks held by getty/9408: [ 581.174958][ T1090] #0: ffff88808c89b090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.174981][ T1090] #1: ffffc9000197b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.175008][ T1090] 2 locks held by getty/9409: [ 581.175012][ T1090] #0: ffff88809ee2e090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.175036][ T1090] #1: ffffc9000196b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.175062][ T1090] 2 locks held by getty/9410: [ 581.175071][ T1090] #0: ffff888092e30090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.175095][ T1090] #1: ffffc900019ab2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.175122][ T1090] 2 locks held by getty/9411: [ 581.175126][ T1090] #0: ffff88809f958090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.175150][ T1090] #1: ffffc900019db2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.175177][ T1090] 2 locks held by getty/9412: [ 581.175181][ T1090] #0: ffff88809f578090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 581.175205][ T1090] #1: ffffc9000178b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x21d/0x1b30 [ 581.175233][ T1090] 2 locks held by syz-executor300/9434: [ 581.175242][ T1090] 1 lock held by syz-executor300/9439: [ 581.175246][ T1090] #0: ffff888218c5b070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 581.175272][ T1090] 1 lock held by syz-executor300/9440: [ 581.175277][ T1090] #0: ffff888218c5b070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 581.175302][ T1090] 1 lock held by syz-executor300/9441: [ 581.175307][ T1090] #0: ffff888218c5b070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 581.175332][ T1090] 1 lock held by syz-executor300/9442: [ 581.175336][ T1090] #0: ffff888218c5b070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 581.175362][ T1090] 1 lock held by syz-executor300/9443: [ 581.175367][ T1090] #0: ffff888218c5b070 (&fb_info->lock){+.+.}, at: fb_open+0xd3/0x430 [ 581.175389][ T1090] [ 581.175394][ T1090] ============================================= [ 581.175394][ T1090] [ 581.175400][ T1090] NMI backtrace for cpu 1 [ 581.175413][ T1090] CPU: 1 PID: 1090 Comm: khungtaskd Not tainted 5.6.0-rc6-syzkaller #0 [ 581.175420][ T1090] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 581.175425][ T1090] Call Trace: [ 581.175487][ T1090] dump_stack+0x188/0x20d [ 581.175511][ T1090] nmi_cpu_backtrace.cold+0x70/0xb1 [ 581.175583][ T1090] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 581.175601][ T1090] nmi_trigger_cpumask_backtrace+0x231/0x27e [ 581.175659][ T1090] watchdog+0xa8c/0x1010 [ 581.175688][ T1090] ? reset_hung_task_detector+0x30/0x30 [ 581.175739][ T1090] kthread+0x357/0x430 [ 581.175753][ T1090] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 581.175771][ T1090] ret_from_fork+0x24/0x30 [ 581.175805][ T1090] Sending NMI from CPU 1 to CPUs 0: [ 581.176508][ C0] NMI backtrace for cpu 0 [ 581.176514][ C0] CPU: 0 PID: 9434 Comm: syz-executor300 Not tainted 5.6.0-rc6-syzkaller #0 [ 581.176520][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 581.176523][ C0] RIP: 0010:bitfill_aligned+0xdf/0x200 [ 581.176533][ C0] Code: fd e8 75 3d bf fd 31 ff 44 89 fe e8 db 3e bf fd 45 85 ff 0f 85 f9 00 00 00 e8 5d 3d bf fd 44 89 e0 31 d2 bf 07 00 00 00 f7 f5 <41> 89 c4 89 c6 89 c5 e8 b5 3e bf fd 41 83 fc 07 76 62 45 89 e7 4c [ 581.176536][ C0] RSP: 0018:ffffc900020273f8 EFLAGS: 00000246 [ 581.176543][ C0] RAX: 0000000000000050 RBX: 0000000000000000 RCX: ffffffff83b2e7b5 [ 581.176548][ C0] RDX: 0000000000000000 RSI: ffffffff83b2e7c3 RDI: 0000000000000007 [ 581.176552][ C0] RBP: 0000000000000040 R08: ffff8880a616e300 R09: 0000000000000040 [ 581.176556][ C0] R10: ffffed104327fb73 R11: ffff8882193fdb9f R12: 0000000000001400 [ 581.176561][ C0] R13: ffff8880000a0000 R14: 0000000000000000 R15: 0000000000000000 [ 581.176574][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0063) knlGS:0000000009abf840 [ 581.176578][ C0] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 581.176582][ C0] CR2: 0000000009ac80f4 CR3: 00000000a86f6000 CR4: 00000000001406f0 [ 581.176586][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 581.176591][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 581.176593][ C0] Call Trace: [ 581.176596][ C0] cfb_fillrect+0x418/0x7a0 [ 581.176599][ C0] ? cfb_fillrect+0x7a0/0x7a0 [ 581.176602][ C0] vga16fb_fillrect+0x68f/0x1960 [ 581.176604][ C0] ? memcpy+0x35/0x50 [ 581.176608][ C0] bit_clear_margins+0x2d5/0x4a0 [ 581.176610][ C0] ? bit_bmove+0x210/0x210 [ 581.176614][ C0] ? vesafb_probe.cold+0x1162/0x1162 [ 581.176617][ C0] fbcon_clear_margins+0x1de/0x240 [ 581.176620][ C0] fbcon_switch+0xd1b/0x1740 [ 581.176623][ C0] ? fbcon_set_def_font+0x370/0x370 [ 581.176626][ C0] ? fbcon_cursor+0x477/0x650 [ 581.176629][ C0] ? bit_clear+0x4e0/0x4e0 [ 581.176632][ C0] ? is_console_locked+0x5/0x10 [ 581.176635][ C0] ? fbcon_set_origin+0x26/0x50 [ 581.176637][ C0] redraw_screen+0x2a8/0x770 [ 581.176641][ C0] ? vesafb_probe.cold+0x1162/0x1162 [ 581.176644][ C0] ? respond_string+0x290/0x290 [ 581.176647][ C0] ? fbcon_set_palette+0x3b1/0x4a0 [ 581.176650][ C0] fbcon_modechanged+0x5bd/0x780 [ 581.176653][ C0] fbcon_update_vcs+0x3a/0x50 [ 581.176656][ C0] fb_set_var+0xad0/0xd40 [ 581.176659][ C0] ? fb_blank+0x190/0x190 [ 581.176662][ C0] ? preempt_schedule_common+0x5e/0xc0 [ 581.176665][ C0] ? ___preempt_schedule+0x16/0x18 [ 581.176668][ C0] ? lock_acquire+0x197/0x420 [ 581.176671][ C0] ? do_fb_ioctl+0x335/0x7d0 [ 581.176674][ C0] do_fb_ioctl+0x390/0x7d0 [ 581.176677][ C0] ? fb_mmap+0x550/0x550 [ 581.176680][ C0] ? lock_downgrade+0x7f0/0x7f0 [ 581.176683][ C0] ? quarantine_put+0x119/0x1c0 [ 581.176685][ C0] ? kfree+0x1eb/0x2b0 [ 581.176689][ C0] ? tomoyo_path_number_perm+0x411/0x4d0 [ 581.176692][ C0] ? lockdep_hardirqs_on+0x417/0x5d0 [ 581.176695][ C0] ? tomoyo_path_number_perm+0x238/0x4d0 [ 581.176699][ C0] ? tomoyo_execute_permission+0x470/0x470 [ 581.176702][ C0] ? trace_hardirqs_off+0x50/0x220 [ 581.176705][ C0] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 581.176709][ C0] ? do_vfs_ioctl+0x506/0x12c0 [ 581.176711][ C0] fb_compat_ioctl+0x305/0xc50 [ 581.176714][ C0] ? fb_release+0x140/0x140 [ 581.176717][ C0] ? do_sys_open+0xc3/0x140 [ 581.176720][ C0] ? fb_release+0x140/0x140 [ 581.176723][ C0] __ia32_compat_sys_ioctl+0x23d/0x2b0 [ 581.176726][ C0] do_fast_syscall_32+0x270/0xe8f [ 581.176729][ C0] entry_SYSENTER_compat+0x70/0x7f [ 581.176827][ T1090] Kernel panic - not syncing: hung_task: blocked tasks [ 581.176841][ T1090] CPU: 1 PID: 1090 Comm: khungtaskd Not tainted 5.6.0-rc6-syzkaller #0 [ 581.176851][ T1090] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 581.176859][ T1090] Call Trace: [ 581.176874][ T1090] dump_stack+0x188/0x20d [ 581.176924][ T1090] panic+0x2e3/0x75c [ 581.176939][ T1090] ? add_taint.cold+0x16/0x16 [ 581.176961][ T1090] ? cpumask_next+0x3c/0x40 [ 581.176977][ T1090] ? printk_safe_flush+0xd9/0x120 [ 581.176991][ T1090] ? watchdog+0xa8c/0x1010 [ 581.177007][ T1090] ? nmi_trigger_cpumask_backtrace+0x214/0x27e [ 581.177029][ T1090] watchdog+0xa9d/0x1010 [ 581.177053][ T1090] ? reset_hung_task_detector+0x30/0x30 [ 581.177073][ T1090] kthread+0x357/0x430 [ 581.177087][ T1090] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 581.177102][ T1090] ret_from_fork+0x24/0x30 [ 581.178825][ T1090] Kernel Offset: disabled [ 583.025093][ T1090] Rebooting in 86400 seconds..