[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 83.697023][ T27] audit: type=1800 audit(1581592444.561:25): pid=9672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.717287][ T27] audit: type=1800 audit(1581592444.561:26): pid=9672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.761233][ T27] audit: type=1800 audit(1581592444.561:27): pid=9672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.111' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 94.603823][ T2873] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN [ 94.603835][ T2873] KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] [ 94.603855][ T2873] CPU: 0 PID: 2873 Comm: kworker/0:35 Not tainted 5.6.0-rc1-syzkaller #0 [ 94.603863][ T2873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.603881][ T2873] Workqueue: events console_callback [ 94.603901][ T2873] RIP: 0010:fbcon_cursor+0x114/0x660 [ 94.603915][ T2873] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e6 04 00 00 4d 8b b4 24 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ba [ 94.603922][ T2873] RSP: 0018:ffffc90008f7faf0 EFLAGS: 00010203 [ 94.603933][ T2873] RAX: dffffc0000000000 RBX: ffff8880a3860000 RCX: ffffffff83f31930 [ 94.603942][ T2873] RDX: 0000000020000001 RSI: ffffffff83c5b4ec RDI: ffff88809c3573a0 [ 94.603950][ T2873] RBP: ffffc90008f7fb30 R08: ffff88809ec02300 R09: ffffed10147ef884 [ 94.603959][ T2873] R10: ffffed10147ef883 R11: ffff8880a3f7c41f R12: ffff88809c357000 [ 94.603968][ T2873] R13: ffff8880a385c000 R14: 000000010000000c R15: ffff8880a385c468 [ 94.603980][ T2873] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 94.603988][ T2873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.603996][ T2873] CR2: 0000000000455300 CR3: 00000000a7dad000 CR4: 00000000001406f0 [ 94.604007][ T2873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.604016][ T2873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.604020][ T2873] Call Trace: [ 94.604035][ T2873] ? add_softcursor+0x295/0x2f0 [ 94.604052][ T2873] set_cursor+0x1fb/0x280 [ 94.604067][ T2873] redraw_screen+0x4e1/0x7d0 [ 94.604083][ T2873] ? respond_string+0x2c0/0x2c0 [ 94.604099][ T2873] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 94.604115][ T2873] ? get_color+0x225/0x430 [ 94.604135][ T2873] complete_change_console+0x105/0x3a0 [ 94.604151][ T2873] change_console+0x19b/0x2c0 [ 94.604166][ T2873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.604188][ T2873] console_callback+0x3a1/0x400 [ 94.604204][ T2873] ? poke_blanked_console+0x270/0x270 [ 94.604218][ T2873] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 94.604233][ T2873] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 94.604249][ T2873] ? trace_hardirqs_on+0x67/0x240 [ 94.604268][ T2873] process_one_work+0xa05/0x17a0 [ 94.604282][ T2873] ? mark_held_locks+0xf0/0xf0 [ 94.604304][ T2873] ? pwq_dec_nr_in_flight+0x320/0x320 [ 94.604316][ T2873] ? lock_acquire+0x190/0x410 [ 94.604340][ T2873] worker_thread+0x98/0xe40 [ 94.604366][ T2873] kthread+0x361/0x430 [ 94.604379][ T2873] ? process_one_work+0x17a0/0x17a0 [ 94.604392][ T2873] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 94.604409][ T2873] ret_from_fork+0x24/0x30 [ 94.604426][ T2873] Modules linked in: [ 94.604441][ T2873] ---[ end trace 10588331f3234462 ]--- [ 94.604457][ T2873] RIP: 0010:fbcon_cursor+0x114/0x660 [ 94.604471][ T2873] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 e6 04 00 00 4d 8b b4 24 a0 03 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <0f> b6 14 02 4c 89 f0 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 ba [ 94.604478][ T2873] RSP: 0018:ffffc90008f7faf0 EFLAGS: 00010203 [ 94.604490][ T2873] RAX: dffffc0000000000 RBX: ffff8880a3860000 RCX: ffffffff83f31930 [ 94.604498][ T2873] RDX: 0000000020000001 RSI: ffffffff83c5b4ec RDI: ffff88809c3573a0 [ 94.604507][ T2873] RBP: ffffc90008f7fb30 R08: ffff88809ec02300 R09: ffffed10147ef884 [ 94.604517][ T2873] R10: ffffed10147ef883 R11: ffff8880a3f7c41f R12: ffff88809c357000 [ 94.604525][ T2873] R13: ffff8880a385c000 R14: 000000010000000c R15: ffff8880a385c468 [ 94.604536][ T2873] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 94.604545][ T2873] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 94.604554][ T2873] CR2: 0000000000455300 CR3: 00000000a7dad000 CR4: 00000000001406f0 [ 94.604564][ T2873] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 94.604572][ T2873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 94.604578][ T2873] Kernel panic - not syncing: Fatal exception [ 94.606022][ T2873] Kernel Offset: disabled [ 95.015978][ T2873] Rebooting in 86400 seconds..