[ 37.213772] audit: type=1800 audit(1583665852.381:34): pid=7383 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed(directio)" comm="startpar" name="rmnologin" dev="sda1" ino=2456 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 41.722601] random: sshd: uninitialized urandom read (32 bytes read) [ 42.094587] audit: type=1400 audit(1583665857.281:35): avc: denied { map } for pid=7556 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 42.147433] random: sshd: uninitialized urandom read (32 bytes read) [ 42.919626] random: sshd: uninitialized urandom read (32 bytes read) [ 406.706276] audit: type=1400 audit(1583666221.891:36): avc: denied { map } for pid=7564 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 918.324925] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.135' (ECDSA) to the list of known hosts. [ 923.884988] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program [ 924.009487] audit: type=1400 audit(1583666739.191:37): avc: denied { map } for pid=7571 comm="syz-executor953" path="/root/syz-executor953189614" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 1144.790227] INFO: task syz-executor953:7579 blocked for more than 140 seconds. [ 1144.790236] Not tainted 4.14.172-syzkaller #0 [ 1144.790239] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.790244] syz-executor953 D28336 7579 7575 0x00000004 [ 1144.790355] Call Trace: [ 1144.790441] ? __schedule+0x7b8/0x1ca0 [ 1144.790525] ? lock_acquire+0x170/0x3f0 [ 1144.790539] ? __sched_text_start+0x8/0x8 [ 1144.790552] schedule+0x8d/0x1b0 [ 1144.790589] schedule_timeout+0x946/0xe40 [ 1144.790601] ? usleep_range+0x130/0x130 [ 1144.790608] ? find_held_lock+0x2d/0x110 [ 1144.790617] ? __down+0x158/0x290 [ 1144.790630] ? lock_downgrade+0x6e0/0x6e0 [ 1144.790638] ? _raw_spin_unlock_irq+0x24/0x80 [ 1144.790650] __down+0x160/0x290 [ 1144.790662] ? ww_mutex_lock+0xb0/0xb0 [ 1144.790668] ? down+0xd/0x80 [ 1144.790682] down+0x57/0x80 [ 1144.790720] console_lock+0x24/0x70 [ 1144.790758] do_fb_ioctl+0x36a/0x940 [ 1144.790767] ? lock_downgrade+0x6e0/0x6e0 [ 1144.790775] ? fb_read+0x520/0x520 [ 1144.790814] ? avc_has_extended_perms+0x802/0xd40 [ 1144.790824] ? lock_downgrade+0x6e0/0x6e0 [ 1144.790854] ? pud_val+0xd0/0xd0 [ 1144.790862] ? avc_ss_reset+0x100/0x100 [ 1144.790872] ? put_page+0x88/0x1b0 [ 1144.790906] ? wp_page_copy+0x9d4/0x1300 [ 1144.790919] ? follow_pfn+0x200/0x200 [ 1144.790947] fb_ioctl+0xdd/0x130 [ 1144.790954] ? do_fb_ioctl+0x940/0x940 [ 1144.790997] do_vfs_ioctl+0x75a/0xfe0 [ 1144.791007] ? selinux_file_mprotect+0x5c0/0x5c0 [ 1144.791017] ? ioctl_preallocate+0x1a0/0x1a0 [ 1144.791029] ? lock_downgrade+0x6e0/0x6e0 [ 1144.791071] ? security_file_ioctl+0x76/0xb0 [ 1144.791079] ? security_file_ioctl+0x83/0xb0 [ 1144.791090] SyS_ioctl+0x7f/0xb0 [ 1144.791097] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1144.791117] do_syscall_64+0x1d5/0x640 [ 1144.791130] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.791139] RIP: 0033:0x441419 [ 1144.791143] RSP: 002b:00007ffe742a5478 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1144.791153] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419 [ 1144.791158] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1144.791163] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1144.791168] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402190 [ 1144.791173] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 1144.791192] INFO: task syz-executor953:7580 blocked for more than 140 seconds. [ 1144.791196] Not tainted 4.14.172-syzkaller #0 [ 1144.791200] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.791204] syz-executor953 D28688 7580 7573 0x00000004 [ 1144.791221] Call Trace: [ 1144.791234] ? __schedule+0x7b8/0x1ca0 [ 1144.791241] ? lock_acquire+0x170/0x3f0 [ 1144.791254] ? __sched_text_start+0x8/0x8 [ 1144.791266] schedule+0x8d/0x1b0 [ 1144.791274] schedule_timeout+0x946/0xe40 [ 1144.791285] ? usleep_range+0x130/0x130 [ 1144.791292] ? find_held_lock+0x2d/0x110 [ 1144.791300] ? __down+0x158/0x290 [ 1144.791313] ? lock_downgrade+0x6e0/0x6e0 [ 1144.791327] ? _raw_spin_unlock_irq+0x24/0x80 [ 1144.791339] __down+0x160/0x290 [ 1144.791350] ? ww_mutex_lock+0xb0/0xb0 [ 1144.791356] ? down+0xd/0x80 [ 1144.791370] down+0x57/0x80 [ 1144.791378] console_lock+0x24/0x70 [ 1144.791385] do_fb_ioctl+0x36a/0x940 [ 1144.791392] ? lock_downgrade+0x6e0/0x6e0 [ 1144.791400] ? fb_read+0x520/0x520 [ 1144.791410] ? avc_has_extended_perms+0x802/0xd40 [ 1144.791420] ? lock_downgrade+0x6e0/0x6e0 [ 1144.791429] ? pud_val+0xd0/0xd0 [ 1144.791436] ? avc_ss_reset+0x100/0x100 [ 1144.791445] ? put_page+0x88/0x1b0 [ 1144.791453] ? wp_page_copy+0x9d4/0x1300 [ 1144.791465] ? follow_pfn+0x200/0x200 [ 1144.791493] fb_ioctl+0xdd/0x130 [ 1144.791499] ? do_fb_ioctl+0x940/0x940 [ 1144.791508] do_vfs_ioctl+0x75a/0xfe0 [ 1144.791516] ? selinux_file_mprotect+0x5c0/0x5c0 [ 1144.791526] ? ioctl_preallocate+0x1a0/0x1a0 [ 1144.791538] ? lock_downgrade+0x6e0/0x6e0 [ 1144.791550] ? security_file_ioctl+0x76/0xb0 [ 1144.791558] ? security_file_ioctl+0x83/0xb0 [ 1144.791573] SyS_ioctl+0x7f/0xb0 [ 1144.791580] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1144.791590] do_syscall_64+0x1d5/0x640 [ 1144.791603] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.791609] RIP: 0033:0x441419 [ 1144.791613] RSP: 002b:00007ffe742a5478 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1144.791622] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419 [ 1144.791627] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1144.791632] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1144.791637] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402190 [ 1144.791642] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 1144.791699] INFO: task syz-executor953:7581 blocked for more than 140 seconds. [ 1144.791709] Not tainted 4.14.172-syzkaller #0 [ 1144.791713] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.791717] syz-executor953 D28688 7581 7576 0x00000004 [ 1144.791737] Call Trace: [ 1144.791754] ? __schedule+0x7b8/0x1ca0 [ 1144.791762] ? __mutex_lock+0x737/0x1470 [ 1144.791774] ? __sched_text_start+0x8/0x8 [ 1144.791782] ? lock_downgrade+0x6e0/0x6e0 [ 1144.791794] schedule+0x8d/0x1b0 [ 1144.791803] schedule_preempt_disabled+0xf/0x20 [ 1144.791810] __mutex_lock+0x73c/0x1470 [ 1144.791819] ? get_fb_info.part.0+0x5f/0x70 [ 1144.791828] ? fb_open+0xb7/0x400 [ 1144.791840] ? mutex_trylock+0x1a0/0x1a0 [ 1144.791851] ? __mutex_unlock_slowpath+0x75/0x780 [ 1144.791858] ? find_held_lock+0x2d/0x110 [ 1144.791875] ? fb_open+0xb7/0x400 [ 1144.791881] fb_open+0xb7/0x400 [ 1144.791890] ? get_fb_info.part.0+0x70/0x70 [ 1144.791964] chrdev_open+0x1fc/0x540 [ 1144.791975] ? cdev_put.part.0+0x50/0x50 [ 1144.791989] do_dentry_open+0x732/0xe90 [ 1144.791998] ? cdev_put.part.0+0x50/0x50 [ 1144.792007] ? __inode_permission+0x7c/0x300 [ 1144.792018] vfs_open+0x105/0x220 [ 1144.792029] path_openat+0x8ca/0x3c50 [ 1144.792049] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 1144.792066] do_filp_open+0x18e/0x250 [ 1144.792075] ? may_open_dev+0xe0/0xe0 [ 1144.792091] ? lock_downgrade+0x6e0/0x6e0 [ 1144.792102] ? do_raw_spin_unlock+0x164/0x250 [ 1144.792113] ? __alloc_fd+0x1bf/0x490 [ 1144.792127] do_sys_open+0x29d/0x3f0 [ 1144.792137] ? filp_open+0x60/0x60 [ 1144.792147] ? __do_page_fault+0x35b/0xb40 [ 1144.792155] ? do_syscall_64+0x4c/0x640 [ 1144.792163] ? SyS_open+0x30/0x30 [ 1144.792173] do_syscall_64+0x1d5/0x640 [ 1144.792186] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.792193] RIP: 0033:0x441419 [ 1144.792198] RSP: 002b:00007ffe742a5478 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1144.792208] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419 [ 1144.792213] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 1144.792218] RBP: 00000000006cb018 R08: 0000000000000004 R09: 00000000004002c8 [ 1144.792223] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402190 [ 1144.792228] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 1144.792246] INFO: task syz-executor953:7582 blocked for more than 140 seconds. [ 1144.792251] Not tainted 4.14.172-syzkaller #0 [ 1144.792254] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.792258] syz-executor953 D28256 7582 7574 0x00000004 [ 1144.792276] Call Trace: [ 1144.792288] ? __schedule+0x7b8/0x1ca0 [ 1144.792296] ? __mutex_lock+0x737/0x1470 [ 1144.792308] ? __sched_text_start+0x8/0x8 [ 1144.792316] ? lock_downgrade+0x6e0/0x6e0 [ 1144.792328] schedule+0x8d/0x1b0 [ 1144.792337] schedule_preempt_disabled+0xf/0x20 [ 1144.792343] __mutex_lock+0x73c/0x1470 [ 1144.792350] ? get_fb_info.part.0+0x5f/0x70 [ 1144.792357] ? fb_open+0xb7/0x400 [ 1144.792365] ? lock_downgrade+0x6e0/0x6e0 [ 1144.792374] ? mutex_trylock+0x1a0/0x1a0 [ 1144.792386] ? __mutex_unlock_slowpath+0x75/0x780 [ 1144.792392] ? find_held_lock+0x2d/0x110 [ 1144.792409] ? fb_open+0xb7/0x400 [ 1144.792415] fb_open+0xb7/0x400 [ 1144.792441] ? get_fb_info.part.0+0x70/0x70 [ 1144.792449] chrdev_open+0x1fc/0x540 [ 1144.792458] ? cdev_put.part.0+0x50/0x50 [ 1144.792471] do_dentry_open+0x732/0xe90 [ 1144.792480] ? cdev_put.part.0+0x50/0x50 [ 1144.792489] ? __inode_permission+0x7c/0x300 [ 1144.792499] vfs_open+0x105/0x220 [ 1144.792510] path_openat+0x8ca/0x3c50 [ 1144.792530] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 1144.792547] do_filp_open+0x18e/0x250 [ 1144.792556] ? may_open_dev+0xe0/0xe0 [ 1144.792571] ? lock_downgrade+0x6e0/0x6e0 [ 1144.792582] ? do_raw_spin_unlock+0x164/0x250 [ 1144.792592] ? __alloc_fd+0x1bf/0x490 [ 1144.792606] do_sys_open+0x29d/0x3f0 [ 1144.792616] ? filp_open+0x60/0x60 [ 1144.792625] ? __do_page_fault+0x35b/0xb40 [ 1144.792633] ? do_syscall_64+0x4c/0x640 [ 1144.792641] ? SyS_open+0x30/0x30 [ 1144.792650] do_syscall_64+0x1d5/0x640 [ 1144.792664] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.792670] RIP: 0033:0x441419 [ 1144.792674] RSP: 002b:00007ffe742a5478 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1144.792683] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419 [ 1144.792688] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 1144.792693] RBP: 00000000006cb018 R08: 0000000000000004 R09: 00000000004002c8 [ 1144.792698] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402190 [ 1144.792703] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 1144.792721] INFO: task syz-executor953:7583 blocked for more than 140 seconds. [ 1144.792726] Not tainted 4.14.172-syzkaller #0 [ 1144.792729] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1144.792733] syz-executor953 D28688 7583 7572 0x00000004 [ 1144.792750] Call Trace: [ 1144.792762] ? __schedule+0x7b8/0x1ca0 [ 1144.792770] ? __mutex_lock+0x737/0x1470 [ 1144.792781] ? __sched_text_start+0x8/0x8 [ 1144.792789] ? lock_downgrade+0x6e0/0x6e0 [ 1144.792805] schedule+0x8d/0x1b0 [ 1144.792814] schedule_preempt_disabled+0xf/0x20 [ 1144.792822] __mutex_lock+0x73c/0x1470 [ 1144.792830] ? get_fb_info.part.0+0x5f/0x70 [ 1144.792839] ? fb_open+0xb7/0x400 [ 1144.792850] ? mutex_trylock+0x1a0/0x1a0 [ 1144.792862] ? __mutex_unlock_slowpath+0x75/0x780 [ 1144.792869] ? find_held_lock+0x2d/0x110 [ 1144.792884] ? fb_open+0xb7/0x400 [ 1144.792891] fb_open+0xb7/0x400 [ 1144.792900] ? get_fb_info.part.0+0x70/0x70 [ 1144.792907] chrdev_open+0x1fc/0x540 [ 1144.792916] ? cdev_put.part.0+0x50/0x50 [ 1144.792928] do_dentry_open+0x732/0xe90 [ 1144.792937] ? cdev_put.part.0+0x50/0x50 [ 1144.792946] ? __inode_permission+0x7c/0x300 [ 1144.792956] vfs_open+0x105/0x220 [ 1144.792967] path_openat+0x8ca/0x3c50 [ 1144.792987] ? path_lookupat.isra.0+0x7b0/0x7b0 [ 1144.793004] do_filp_open+0x18e/0x250 [ 1144.793014] ? may_open_dev+0xe0/0xe0 [ 1144.793029] ? lock_downgrade+0x6e0/0x6e0 [ 1144.793040] ? do_raw_spin_unlock+0x164/0x250 [ 1144.793050] ? __alloc_fd+0x1bf/0x490 [ 1144.793064] do_sys_open+0x29d/0x3f0 [ 1144.793074] ? filp_open+0x60/0x60 [ 1144.793083] ? __do_page_fault+0x35b/0xb40 [ 1144.793091] ? do_syscall_64+0x4c/0x640 [ 1144.793099] ? SyS_open+0x30/0x30 [ 1144.793108] do_syscall_64+0x1d5/0x640 [ 1144.793121] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.793127] RIP: 0033:0x441419 [ 1144.793131] RSP: 002b:00007ffe742a5478 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 1144.793140] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419 [ 1144.793145] RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c [ 1144.793150] RBP: 00000000006cb018 R08: 0000000000000004 R09: 00000000004002c8 [ 1144.793155] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402190 [ 1144.793160] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 1144.793175] [ 1144.793175] Showing all locks held in the system: [ 1144.793185] 1 lock held by khungtaskd/1055: [ 1144.793189] #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7c/0x21a [ 1144.793224] 1 lock held by rsyslogd/7422: [ 1144.793227] #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xa6/0xc0 [ 1144.793248] 2 locks held by getty/7543: [ 1144.793251] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793324] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793345] 2 locks held by getty/7544: [ 1144.793348] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793367] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793387] 2 locks held by getty/7545: [ 1144.793390] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793409] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793435] 2 locks held by getty/7546: [ 1144.793437] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793455] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793475] 2 locks held by getty/7547: [ 1144.793478] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793497] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793517] 2 locks held by getty/7548: [ 1144.793520] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793539] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793559] 2 locks held by getty/7549: [ 1144.793562] #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x22/0x80 [ 1144.793580] #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e4/0x16f0 [ 1144.793602] 1 lock held by syz-executor953/7581: [ 1144.793605] #0: (&fb_info->lock){+.+.}, at: [] fb_open+0xb7/0x400 [ 1144.793624] 1 lock held by syz-executor953/7582: [ 1144.793627] #0: (&fb_info->lock){+.+.}, at: [] fb_open+0xb7/0x400 [ 1144.793646] 1 lock held by syz-executor953/7583: [ 1144.793649] #0: (&fb_info->lock){+.+.}, at: [] fb_open+0xb7/0x400 [ 1144.793666] [ 1144.793669] ============================================= [ 1144.793669] [ 1144.793674] NMI backtrace for cpu 1 [ 1144.793682] CPU: 1 PID: 1055 Comm: khungtaskd Not tainted 4.14.172-syzkaller #0 [ 1144.793686] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1144.793689] Call Trace: [ 1144.793759] dump_stack+0x13e/0x194 [ 1144.793772] nmi_cpu_backtrace.cold+0x57/0x93 [ 1144.793784] ? irq_force_complete_move.cold+0x7b/0x7b [ 1144.793791] nmi_trigger_cpumask_backtrace+0x139/0x17e [ 1144.793831] watchdog+0x5e2/0xb80 [ 1144.793859] ? kthread_flush_work_fn+0x20/0x20 [ 1144.793868] ? hungtask_pm_notify+0x50/0x50 [ 1144.793877] kthread+0x30d/0x420 [ 1144.793885] ? kthread_create_on_node+0xd0/0xd0 [ 1144.793894] ret_from_fork+0x24/0x30 [ 1144.793911] Sending NMI from CPU 1 to CPUs 0: [ 1144.794616] NMI backtrace for cpu 0 [ 1144.794621] CPU: 0 PID: 7578 Comm: syz-executor953 Not tainted 4.14.172-syzkaller #0 [ 1144.794625] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1144.794628] task: ffff88809e64a080 task.stack: ffff888086358000 [ 1144.794631] RIP: 0010:bitfill_aligned+0xf7/0x190 [ 1144.794634] RSP: 0018:ffff88808635f318 EFLAGS: 00000286 [ 1144.794639] RAX: ffff8880000a00b8 RBX: ffff8880000a00c0 RCX: 0000000000000000 [ 1144.794642] RDX: 0000000000000000 RSI: ffff8880000a0000 RDI: 0000000000001400 [ 1144.794645] RBP: 0000000000000050 R08: 0000000000001400 R09: 0000000000000040 [ 1144.794649] R10: ffffed10432ab40b R11: ffff88821955a05f R12: ffff8880000a0280 [ 1144.794652] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 1144.794656] FS: 0000000000b50880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 1144.794659] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1144.794662] CR2: 0000000020000180 CR3: 0000000083c11000 CR4: 00000000001406f0 [ 1144.794665] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1144.794669] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1144.794671] Call Trace: [ 1144.794673] cfb_fillrect+0x3d5/0x720 [ 1144.794675] ? cfb_fillrect+0x720/0x720 [ 1144.794678] vga16fb_fillrect+0x61e/0x1880 [ 1144.794680] ? fb_copy_cmap+0x28e/0x350 [ 1144.794682] ? vga16fb_setcolreg+0xfe/0x360 [ 1144.794685] bit_clear_margins+0x2a4/0x480 [ 1144.794687] ? bit_bmove+0x1e0/0x1e0 [ 1144.794690] fbcon_clear_margins+0x285/0x310 [ 1144.794692] fbcon_switch+0xcdf/0x1780 [ 1144.794694] ? kasan_kmalloc+0xbf/0xe0 [ 1144.794697] ? fbcon_set_def_font+0x370/0x370 [ 1144.794699] ? fbcon_cursor+0x4be/0x690 [ 1144.794701] ? bit_clear+0x460/0x460 [ 1144.794704] ? fbcon_set_origin+0x1c/0x40 [ 1144.794706] ? fbcon_scrolldelta+0x10c0/0x10c0 [ 1144.794708] redraw_screen+0x331/0x770 [ 1144.794711] ? con_flush_chars+0x80/0x80 [ 1144.794713] ? fbcon_set_palette+0x470/0x590 [ 1144.794716] fbcon_modechanged+0x59d/0x890 [ 1144.794718] fbcon_event_notify+0x11a/0x1746 [ 1144.794721] ? lock_acquire+0x170/0x3f0 [ 1144.794723] notifier_call_chain+0x107/0x1a0 [ 1144.794726] blocking_notifier_call_chain+0x79/0x90 [ 1144.794728] fb_set_var+0xaad/0xc70 [ 1144.794731] ? fb_set_suspend+0x110/0x110 [ 1144.794733] ? lock_acquire+0x170/0x3f0 [ 1144.794736] ? lock_fb_info+0x1a/0x70 [ 1144.794738] ? lock_fb_info+0x1a/0x70 [ 1144.794740] ? __mutex_lock+0x36a/0x1470 [ 1144.794743] ? trace_hardirqs_on+0x10/0x10 [ 1144.794745] ? mutex_trylock+0x1a0/0x1a0 [ 1144.794747] ? do_fb_ioctl+0x36a/0x940 [ 1144.794750] do_fb_ioctl+0x3cc/0x940 [ 1144.794752] ? lock_downgrade+0x6e0/0x6e0 [ 1144.794754] ? fb_read+0x520/0x520 [ 1144.794757] ? avc_has_extended_perms+0x802/0xd40 [ 1144.794759] ? lock_downgrade+0x6e0/0x6e0 [ 1144.794761] ? pud_val+0xd0/0xd0 [ 1144.794764] ? avc_ss_reset+0x100/0x100 [ 1144.794766] ? put_page+0x88/0x1b0 [ 1144.794768] ? wp_page_copy+0x9d4/0x1300 [ 1144.794770] ? follow_pfn+0x200/0x200 [ 1144.794773] fb_ioctl+0xdd/0x130 [ 1144.794775] ? do_fb_ioctl+0x940/0x940 [ 1144.794777] do_vfs_ioctl+0x75a/0xfe0 [ 1144.794780] ? selinux_file_mprotect+0x5c0/0x5c0 [ 1144.794782] ? ioctl_preallocate+0x1a0/0x1a0 [ 1144.794785] ? lock_downgrade+0x6e0/0x6e0 [ 1144.794787] ? security_file_ioctl+0x76/0xb0 [ 1144.794790] ? security_file_ioctl+0x83/0xb0 [ 1144.794792] SyS_ioctl+0x7f/0xb0 [ 1144.794794] ? do_vfs_ioctl+0xfe0/0xfe0 [ 1144.794796] do_syscall_64+0x1d5/0x640 [ 1144.794799] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1144.794801] RIP: 0033:0x441419 [ 1144.794804] RSP: 002b:00007ffe742a5478 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1144.794809] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441419 [ 1144.794813] RDX: 0000000020000000 RSI: 0000000000004601 RDI: 0000000000000003 [ 1144.794816] RBP: 00000000006cb018 R08: 00000000004002c8 R09: 00000000004002c8 [ 1144.794819] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000402190 [ 1144.794823] R13: 0000000000402220 R14: 0000000000000000 R15: 0000000000000000 [ 1144.794824] Code: 49 01 dc e8 8c 88 3f 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 56 88 3f fe 41 8d [ 1144.794937] Kernel panic - not syncing: hung_task: blocked tasks [ 1144.794946] CPU: 1 PID: 1055 Comm: khungtaskd Not tainted 4.14.172-syzkaller #0 [ 1144.794950] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1144.794953] Call Trace: [ 1144.794965] dump_stack+0x13e/0x194 [ 1144.795025] panic+0x1f9/0x42d [ 1144.795034] ? add_taint.cold+0x16/0x16 [ 1144.795047] ? printk_safe_flush+0xac/0x110 [ 1144.795061] watchdog+0x5f3/0xb80 [ 1144.795069] ? kthread_flush_work_fn+0x20/0x20 [ 1144.795078] ? hungtask_pm_notify+0x50/0x50 [ 1144.795087] kthread+0x30d/0x420 [ 1144.795094] ? kthread_create_on_node+0xd0/0xd0 [ 1144.795103] ret_from_fork+0x24/0x30 [ 1144.796763] Kernel Offset: disabled