[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 89.392784][ T27] audit: type=1800 audit(1581833219.798:25): pid=9643 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 89.418416][ T27] audit: type=1800 audit(1581833219.808:26): pid=9643 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 89.467681][ T27] audit: type=1800 audit(1581833219.808:27): pid=9643 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 '10.128.0.27' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 100.267348][ T9796] general protection fault, probably for non-canonical address 0xdffffc0020000001: 0000 [#1] PREEMPT SMP KASAN [ 100.267359][ T9796] KASAN: maybe wild-memory-access in range [0x0000000100000008-0x000000010000000f] [ 100.267372][ T9796] CPU: 0 PID: 9796 Comm: syz-executor243 Not tainted 5.6.0-rc1-syzkaller #0 [ 100.267380][ T9796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.267401][ T9796] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0 [ 100.267415][ T9796] Code: 7e fe ff ff 45 01 ef e8 9d 44 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 [ 100.267422][ T9796] RSP: 0018:ffffc9000629f9d0 EFLAGS: 00010203 [ 100.267432][ T9796] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83f44920 [ 100.267439][ T9796] RDX: 0000000000000000 RSI: ffffffff83f44973 RDI: 0000000000000003 [ 100.267448][ T9796] RBP: ffffc9000629fb60 R08: ffff88808d6f4440 R09: ffff88808d6f4cd0 [ 100.267455][ T9796] R10: fffffbfff154b478 R11: ffffffff8aa5a3c7 R12: dffffc0000000000 [ 100.267461][ T9796] R13: 0000000000000000 R14: ffff88809fcc1000 R15: 000000000000074d [ 100.267471][ T9796] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000098dd840 [ 100.267478][ T9796] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 100.267486][ T9796] CR2: 0000000020000180 CR3: 000000009fc6e000 CR4: 00000000001406f0 [ 100.267498][ T9796] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 100.267506][ T9796] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 100.267510][ T9796] Call Trace: [ 100.267539][ T9796] ? do_con_trol+0x61b0/0x61b0 [ 100.267554][ T9796] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 100.267566][ T9796] ? add_wait_queue+0x112/0x170 [ 100.267578][ T9796] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 100.267596][ T9796] ? trace_hardirqs_on+0x67/0x240 [ 100.267615][ T9796] con_write+0x46/0xd0 [ 100.267630][ T9796] n_tty_write+0x40e/0x1080 [ 100.267652][ T9796] ? n_tty_read+0x1bf0/0x1bf0 [ 100.267666][ T9796] ? prepare_to_wait_exclusive+0x320/0x320 [ 100.267686][ T9796] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 100.267700][ T9796] ? _copy_from_user+0x12c/0x1a0 [ 100.267715][ T9796] tty_write+0x496/0x7f0 [ 100.267729][ T9796] ? n_tty_read+0x1bf0/0x1bf0 [ 100.267748][ T9796] __vfs_write+0x8a/0x110 [ 100.267760][ T9796] ? put_tty_driver+0x20/0x20 [ 100.267777][ T9796] vfs_write+0x268/0x5d0 [ 100.267796][ T9796] ksys_write+0x14f/0x290 [ 100.267812][ T9796] ? __ia32_sys_read+0xb0/0xb0 [ 100.267828][ T9796] ? do_fast_syscall_32+0xd1/0xe16 [ 100.267840][ T9796] ? entry_SYSENTER_compat+0x70/0x7f [ 100.267853][ T9796] ? do_fast_syscall_32+0xd1/0xe16 [ 100.267870][ T9796] __ia32_sys_write+0x71/0xb0 [ 100.267886][ T9796] do_fast_syscall_32+0x27b/0xe16 [ 100.267904][ T9796] entry_SYSENTER_compat+0x70/0x7f [ 100.267914][ T9796] RIP: 0023:0xf7f93e39 [ 100.267928][ T9796] Code: 1d 00 00 00 89 d3 5b 5e 5d c3 8b 04 24 c3 8b 1c 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 100.267935][ T9796] RSP: 002b:00000000ffd5434c EFLAGS: 00000246 ORIG_RAX: 0000000000000004 [ 100.267948][ T9796] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020002b40 [ 100.267956][ T9796] RDX: 0000000000000002 RSI: 00000000080eb080 RDI: 00000000ffd543a0 [ 100.267964][ T9796] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 100.267971][ T9796] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 100.267979][ T9796] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 100.267996][ T9796] Modules linked in: [ 100.281315][ T9796] ---[ end trace 129ce2795d491d17 ]--- [ 100.281340][ T9796] RIP: 0010:do_con_write.part.0+0xa01/0x1ef0 [ 100.281353][ T9796] Code: 7e fe ff ff 45 01 ef e8 9d 44 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 [ 100.281360][ T9796] RSP: 0018:ffffc9000629f9d0 EFLAGS: 00010203 [ 100.281370][ T9796] RAX: 0000000020000001 RBX: 000000010000000e RCX: ffffffff83f44920 [ 100.281378][ T9796] RDX: 0000000000000000 RSI: ffffffff83f44973 RDI: 0000000000000003 [ 100.281386][ T9796] RBP: ffffc9000629fb60 R08: ffff88808d6f4440 R09: ffff88808d6f4cd0 [ 100.281394][ T9796] R10: fffffbfff154b478 R11: ffffffff8aa5a3c7 R12: dffffc0000000000 [ 100.281401][ T9796] R13: 0000000000000000 R14: ffff88809fcc1000 R15: 000000000000074d [ 100.281412][ T9796] FS: 0000000000000000(0000) GS:ffff8880ae800000(0063) knlGS:00000000098dd840 [ 100.281420][ T9796] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 100.281429][ T9796] CR2: 00007fd99635c000 CR3: 000000009fc6e000 CR4: 00000000001406f0 [ 100.281441][ T9796] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 100.281447][ T9796] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 100.281454][ T9796] Kernel panic - not syncing: Fatal exception [ 100.283039][ T9796] Kernel Offset: disabled [ 100.766423][ T9796] Rebooting in 86400 seconds..