[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.020384][ T23] audit: type=1800 audit(1581500420.062:25): pid=8726 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.040906][ T23] audit: type=1800 audit(1581500420.062:26): pid=8726 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.092315][ T23] audit: type=1800 audit(1581500420.072:27): pid=8726 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.1.34' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.788766][ T2936] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN [ 66.788774][ T2936] KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] [ 66.788784][ T2936] CPU: 1 PID: 2936 Comm: kworker/1:49 Not tainted 5.6.0-rc1-syzkaller #0 [ 66.788789][ T2936] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.788802][ T2936] Workqueue: events console_callback [ 66.788813][ T2936] RIP: 0010:redraw_screen+0xf1c/0x1830 [ 66.788820][ T2936] Code: 00 00 00 00 00 fc ff df 80 3c 10 00 74 12 48 89 df e8 68 2f b5 fd 48 ba 00 00 00 00 00 fc ff df 4c 8b 2b 4d 89 ec 49 c1 ec 03 <41> 8a 04 14 84 c0 0f 85 ef 07 00 00 45 0f b7 75 00 48 8b 45 a0 48 [ 66.788825][ T2936] RSP: 0018:ffffc900085b7b38 EFLAGS: 00010203 [ 66.788831][ T2936] RAX: 1ffff110127e0c74 RBX: ffff888093f063a0 RCX: ffff88809e516640 [ 66.788837][ T2936] RDX: dffffc0000000000 RSI: 00000000000000c0 RDI: 0000000000000000 [ 66.788842][ T2936] RBP: ffffc900085b7bc0 R08: ffffffff83fef5be R09: ffffed10431c9484 [ 66.788847][ T2936] R10: ffffed10431c9484 R11: 0000000000000000 R12: 0000000020000001 [ 66.788852][ T2936] R13: 000000010000000c R14: 000000000000001f R15: 0000000000000000 [ 66.788858][ T2936] FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 66.788863][ T2936] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.788868][ T2936] CR2: 0000000000455300 CR3: 000000008c51f000 CR4: 00000000001406e0 [ 66.788877][ T2936] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.788882][ T2936] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.788884][ T2936] Call Trace: [ 66.788906][ T2936] complete_change_console+0xb9/0x750 [ 66.788915][ T2936] ? fbcon_cursor+0x8a4/0xc40 [ 66.788929][ T2936] change_console+0x2d8/0x450 [ 66.788938][ T2936] ? hide_cursor+0x14e/0x360 [ 66.788951][ T2936] console_callback+0x104/0x330 [ 66.788965][ T2936] process_one_work+0x7f5/0x10f0 [ 66.788988][ T2936] worker_thread+0xbbc/0x1630 [ 66.789018][ T2936] kthread+0x332/0x350 [ 66.789026][ T2936] ? rcu_lock_release+0x30/0x30 [ 66.789035][ T2936] ? kthread_blkcg+0xe0/0xe0 [ 66.789047][ T2936] ret_from_fork+0x24/0x30 [ 66.789062][ T2936] Modules linked in: [ 66.789074][ T2936] ---[ end trace f61ede7c24462fc9 ]--- [ 66.789083][ T2936] RIP: 0010:redraw_screen+0xf1c/0x1830 [ 66.789090][ T2936] Code: 00 00 00 00 00 fc ff df 80 3c 10 00 74 12 48 89 df e8 68 2f b5 fd 48 ba 00 00 00 00 00 fc ff df 4c 8b 2b 4d 89 ec 49 c1 ec 03 <41> 8a 04 14 84 c0 0f 85 ef 07 00 00 45 0f b7 75 00 48 8b 45 a0 48 [ 66.789094][ T2936] RSP: 0018:ffffc900085b7b38 EFLAGS: 00010203 [ 66.789100][ T2936] RAX: 1ffff110127e0c74 RBX: ffff888093f063a0 RCX: ffff88809e516640 [ 66.789104][ T2936] RDX: dffffc0000000000 RSI: 00000000000000c0 RDI: 0000000000000000 [ 66.789109][ T2936] RBP: ffffc900085b7bc0 R08: ffffffff83fef5be R09: ffffed10431c9484 [ 66.789113][ T2936] R10: ffffed10431c9484 R11: 0000000000000000 R12: 0000000020000001 [ 66.789118][ T2936] R13: 000000010000000c R14: 000000000000001f R15: 0000000000000000 [ 66.789124][ T2936] FS: 0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 66.789129][ T2936] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.789134][ T2936] CR2: 0000000000455300 CR3: 000000008c51f000 CR4: 00000000001406e0 [ 66.789139][ T2936] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.789144][ T2936] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.789149][ T2936] Kernel panic - not syncing: Fatal exception [ 66.790694][ T2936] Kernel Offset: disabled [ 67.135811][ T2936] Rebooting in 86400 seconds..