[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.93' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.745453] audit: type=1400 audit(1595366579.088:8): avc: denied { execmem } for pid=6445 comm="syz-executor086" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.824449] divide error: 0000 [#1] PREEMPT SMP KASAN [ 38.824464] CPU: 1 PID: 19 Comm: kworker/1:0 Not tainted 4.19.133-syzkaller #0 [ 38.824526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.824542] Workqueue: events console_callback [ 38.824560] RIP: 0010:fbcon_switch+0x1fe/0x1d26 [ 38.824571] Code: 2d 57 18 b3 08 48 89 2d d0 17 b3 08 38 ca 7c 08 84 c9 0f 85 0d 1b 00 00 41 8b 9c 24 3c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 26 3c e9 fd 41 83 fe 05 0f 8e 8d 0e 00 00 [ 38.824577] RSP: 0018:ffff8880a9f7f9c8 EFLAGS: 00010246 [ 38.824586] RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 [ 38.824593] RDX: 0000000000000000 RSI: ffffffff83806d9d RDI: 0000000000000005 [ 38.824600] RBP: ffff8880a57d0040 R08: 0000000000000000 R09: 0000000000000000 [ 38.824607] R10: 0000000000000005 R11: 0000000000000000 R12: ffff888089e70100 [ 38.824614] R13: ffff8880a56f0e80 R14: 0000000000008000 R15: ffffffff87cf5ea0 [ 38.824623] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 38.824631] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.824638] CR2: 00007f3fd5f4be78 CR3: 000000009331a000 CR4: 00000000001406e0 [ 38.824647] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.824654] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.824658] Call Trace: [ 38.824674] ? lock_acquire+0x170/0x3c0 [ 38.824685] ? get_pwq+0x8c/0x140 [ 38.824698] ? fbcon_startup+0xfe0/0xfe0 [ 38.824712] ? kernfs_notify+0xa4/0x150 [ 38.824728] ? mark_held_locks+0xa6/0xf0 [ 38.824740] ? trace_hardirqs_off+0x64/0x200 [ 38.824752] ? _raw_spin_unlock_irqrestore+0x79/0xe0 [ 38.824764] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 38.824776] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 38.824789] ? fbcon_set_origin+0x26/0x50 [ 38.824801] redraw_screen+0x37d/0x870 [ 38.824810] ? vc_init+0x440/0x440 [ 38.824820] ? mark_held_locks+0xf0/0xf0 [ 38.824831] ? fb_get_color_depth+0x11a/0x240 [ 38.824843] ? __sanitizer_cov_trace_switch+0x4b/0x80 [ 38.824857] complete_change_console+0xf9/0x610 [ 38.824868] ? fbcon_cursor+0x555/0x760 [ 38.824879] change_console+0x196/0x560 [ 38.824892] console_callback+0x393/0x3f0 [ 38.824904] ? poke_blanked_console+0x270/0x270 [ 38.824918] process_one_work+0x864/0x1570 [ 38.824932] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 38.824947] worker_thread+0x64c/0x1130 [ 38.824963] ? process_one_work+0x1570/0x1570 [ 38.824975] kthread+0x30b/0x410 [ 38.824986] ? kthread_park+0x180/0x180 [ 38.824998] ret_from_fork+0x24/0x30 [ 38.825008] Modules linked in: [ 38.825022] ---[ end trace ae3797ceae826729 ]--- [ 38.825036] RIP: 0010:fbcon_switch+0x1fe/0x1d26 [ 38.825046] Code: 2d 57 18 b3 08 48 89 2d d0 17 b3 08 38 ca 7c 08 84 c9 0f 85 0d 1b 00 00 41 8b 9c 24 3c 03 00 00 44 89 f0 31 d2 bf 05 00 00 00 f3 41 89 c6 89 c6 e8 26 3c e9 fd 41 83 fe 05 0f 8e 8d 0e 00 00 [ 38.825053] RSP: 0018:ffff8880a9f7f9c8 EFLAGS: 00010246 [ 38.825061] RAX: 0000000000008000 RBX: 0000000000000000 RCX: 0000000000000000 [ 38.825068] RDX: 0000000000000000 RSI: ffffffff83806d9d RDI: 0000000000000005 [ 38.825075] RBP: ffff8880a57d0040 R08: 0000000000000000 R09: 0000000000000000 [ 38.825082] R10: 0000000000000005 R11: 0000000000000000 R12: ffff888089e70100 [ 38.825089] R13: ffff8880a56f0e80 R14: 0000000000008000 R15: ffffffff87cf5ea0 [ 38.825098] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 38.825106] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.825113] CR2: 00007f3fd5f4be78 CR3: 000000009331a000 CR4: 00000000001406e0 [ 38.825120] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.825127] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.825132] Kernel panic - not syncing: Fatal exception [ 38.826289] Kernel Offset: disabled [ 39.187589] Rebooting in 86400 seconds..