[ 90.659766][ T27] audit: type=1800 audit(1581968762.319:26): pid=9713 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 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. [ 91.768738][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 91.768750][ T27] audit: type=1800 audit(1581968763.439:29): pid=9713 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 91.795157][ T27] audit: type=1800 audit(1581968763.449:30): pid=9713 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.6' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 101.901431][ T9865] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN [ 101.901443][ T9865] KASAN: probably user-memory-access in range [0x0000000100000008-0x000000010000000f] [ 101.901456][ T9865] CPU: 0 PID: 9865 Comm: syz-executor171 Not tainted 5.6.0-rc2-syzkaller #0 [ 101.901464][ T9865] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.901483][ T9865] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0 [ 101.901496][ T9865] Code: 7e fe ff ff 45 01 ef e8 5d 37 81 fd 48 8b 85 c8 fe ff ff 80 38 00 0f 85 71 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 101.901502][ T9865] RSP: 0018:ffffc90005ca79e0 EFLAGS: 00010203 [ 101.901512][ T9865] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83f45980 [ 101.901520][ T9865] RDX: 0000000000000000 RSI: ffffffff83f459d3 RDI: 0000000000000003 [ 101.901529][ T9865] RBP: ffffc90005ca7b70 R08: ffff88809af96040 R09: ffff88809af968d0 [ 101.901537][ T9865] R10: fffffbfff154b4d0 R11: ffffffff8aa5a687 R12: dffffc0000000000 [ 101.901544][ T9865] R13: 0000000000000000 R14: ffff88808fde9000 R15: 000000000000074d [ 101.901555][ T9865] FS: 0000000001cd1880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 101.901563][ T9865] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 101.901572][ T9865] CR2: 00007f27386af000 CR3: 000000008f762000 CR4: 00000000001406f0 [ 101.901583][ T9865] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 101.901591][ T9865] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 101.901595][ T9865] Call Trace: [ 101.901626][ T9865] ? do_con_trol+0x61b0/0x61b0 [ 101.901641][ T9865] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 101.901653][ T9865] ? add_wait_queue+0x112/0x170 [ 101.901667][ T9865] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 101.901687][ T9865] ? trace_hardirqs_on+0x67/0x240 [ 101.901704][ T9865] con_write+0x46/0xd0 [ 101.901720][ T9865] n_tty_write+0x40e/0x1080 [ 101.901744][ T9865] ? n_tty_read+0x1bf0/0x1bf0 [ 101.901759][ T9865] ? prepare_to_wait_exclusive+0x320/0x320 [ 101.901778][ T9865] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.901791][ T9865] ? _copy_from_user+0x12c/0x1a0 [ 101.901805][ T9865] tty_write+0x496/0x7f0 [ 101.901820][ T9865] ? n_tty_read+0x1bf0/0x1bf0 [ 101.901839][ T9865] __vfs_write+0x8a/0x110 [ 101.901851][ T9865] ? put_tty_driver+0x20/0x20 [ 101.901867][ T9865] vfs_write+0x268/0x5d0 [ 101.901885][ T9865] ksys_write+0x14f/0x290 [ 101.901902][ T9865] ? __ia32_sys_read+0xb0/0xb0 [ 101.901919][ T9865] ? do_syscall_64+0x26/0x790 [ 101.901934][ T9865] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.901947][ T9865] ? do_syscall_64+0x26/0x790 [ 101.901966][ T9865] __x64_sys_write+0x73/0xb0 [ 101.901981][ T9865] do_syscall_64+0xfa/0x790 [ 101.901998][ T9865] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.902007][ T9865] RIP: 0033:0x4403c9 [ 101.902021][ T9865] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 101.902028][ T9865] RSP: 002b:00007ffd0cb518b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 101.902041][ T9865] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004403c9 [ 101.902049][ T9865] RDX: 0000000000000002 RSI: 0000000020002b40 RDI: 0000000000000004 [ 101.902057][ T9865] RBP: 00000000006ca018 R08: 000000000000000e R09: 00000000004002c8 [ 101.902065][ T9865] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401cb0 [ 101.902073][ T9865] R13: 0000000000401d40 R14: 0000000000000000 R15: 0000000000000000 [ 101.902090][ T9865] Modules linked in: [ 101.902106][ T9865] ---[ end trace e4f232a7cb1405de ]--- [ 101.902130][ T9865] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0 [ 101.902144][ T9865] Code: 7e fe ff ff 45 01 ef e8 5d 37 81 fd 48 8b 85 c8 fe ff ff 80 38 00 0f 85 71 12 00 00 49 8b 9e a0 03 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 14 20 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 [ 101.902151][ T9865] RSP: 0018:ffffc90005ca79e0 EFLAGS: 00010203 [ 101.902162][ T9865] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83f45980 [ 101.902170][ T9865] RDX: 0000000000000000 RSI: ffffffff83f459d3 RDI: 0000000000000003 [ 101.902179][ T9865] RBP: ffffc90005ca7b70 R08: ffff88809af96040 R09: ffff88809af968d0 [ 101.902188][ T9865] R10: fffffbfff154b4d0 R11: ffffffff8aa5a687 R12: dffffc0000000000 [ 101.902196][ T9865] R13: 0000000000000000 R14: ffff88808fde9000 R15: 000000000000074d [ 101.902208][ T9865] FS: 0000000001cd1880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 101.902217][ T9865] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 101.902226][ T9865] CR2: 00007f27386af000 CR3: 000000008f762000 CR4: 00000000001406f0 [ 101.902236][ T9865] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 101.902245][ T9865] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 101.902251][ T9865] Kernel panic - not syncing: Fatal exception [ 101.903970][ T9865] Kernel Offset: disabled [ 102.395724][ T9865] Rebooting in 86400 seconds..