[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 64.749988][ T27] audit: type=1800 audit(1575911680.651:25): pid=8911 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 64.770158][ T27] audit: type=1800 audit(1575911680.651:26): pid=8911 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 64.824455][ T27] audit: type=1800 audit(1575911680.661:27): pid=8911 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 '10.128.0.142' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.521534][ T9067] BUG: unable to handle page fault for address: 000000010000000e [ 75.521541][ T9067] #PF: supervisor write access in kernel mode [ 75.521548][ T9067] #PF: error_code(0x0002) - not-present page [ 75.521552][ T9067] PGD a2c72067 P4D a2c72067 PUD 0 [ 75.521571][ T9067] Oops: 0002 [#1] PREEMPT SMP KASAN [ 75.521583][ T9067] CPU: 1 PID: 9067 Comm: syz-executor386 Not tainted 5.5.0-rc1-syzkaller #0 [ 75.521590][ T9067] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.521609][ T9067] RIP: 0010:do_con_trol+0x47ea/0x61b0 [ 75.521629][ T9067] Code: 08 2c 01 0f 8e b1 00 00 00 4c 8b bd 08 ff ff ff 48 63 db 44 89 e9 41 0f b7 84 24 c8 03 00 00 48 01 db d1 e9 49 01 df 4c 89 ff 66 ab 49 8d bc 24 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 [ 75.521635][ T9067] RSP: 0018:ffffc90001da78a0 EFLAGS: 00010202 [ 75.521645][ T9067] RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001 [ 75.521652][ T9067] RDX: 1ffff11012ddac79 RSI: ffffffff83e103ed RDI: 000000010000000e [ 75.521660][ T9067] RBP: ffffc90001da79c0 R08: ffff8880991f8580 R09: ffff8880991f8e10 [ 75.521667][ T9067] R10: fffffbfff14f3330 R11: ffffffff8a799987 R12: ffff888096ed6000 [ 75.521674][ T9067] R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e [ 75.521685][ T9067] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:0000000009289840 [ 75.521693][ T9067] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 75.521701][ T9067] CR2: 000000010000000e CR3: 00000000a7a69000 CR4: 00000000001406e0 [ 75.521712][ T9067] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.521718][ T9067] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.521722][ T9067] Call Trace: [ 75.521739][ T9067] ? reset_palette+0x190/0x190 [ 75.521752][ T9067] ? __kasan_check_read+0x11/0x20 [ 75.521768][ T9067] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 75.521791][ T9067] do_con_write.part.0+0xfd9/0x1ef0 [ 75.521810][ T9067] ? do_con_trol+0x61b0/0x61b0 [ 75.521825][ T9067] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 75.521835][ T9067] ? add_wait_queue+0x112/0x170 [ 75.521846][ T9067] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 75.521862][ T9067] ? trace_hardirqs_on+0x67/0x240 [ 75.521878][ T9067] con_write+0x46/0xd0 [ 75.521893][ T9067] n_tty_write+0x40e/0x1080 [ 75.521913][ T9067] ? n_tty_read+0x1bf0/0x1bf0 [ 75.521926][ T9067] ? prepare_to_wait_exclusive+0x320/0x320 [ 75.521942][ T9067] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 75.521955][ T9067] ? _copy_from_user+0x12c/0x1a0 [ 75.521967][ T9067] tty_write+0x496/0x7f0 [ 75.521980][ T9067] ? n_tty_read+0x1bf0/0x1bf0 [ 75.521995][ T9067] __vfs_write+0x8a/0x110 [ 75.522006][ T9067] ? put_tty_driver+0x20/0x20 [ 75.522019][ T9067] vfs_write+0x268/0x5d0 [ 75.522034][ T9067] ksys_write+0x14f/0x290 [ 75.522047][ T9067] ? __ia32_sys_read+0xb0/0xb0 [ 75.522063][ T9067] ? do_fast_syscall_32+0xd1/0xe16 [ 75.522075][ T9067] ? entry_SYSENTER_compat+0x70/0x7f [ 75.522088][ T9067] ? do_fast_syscall_32+0xd1/0xe16 [ 75.522103][ T9067] __ia32_sys_write+0x71/0xb0 [ 75.522117][ T9067] do_fast_syscall_32+0x27b/0xe16 [ 75.522131][ T9067] entry_SYSENTER_compat+0x70/0x7f [ 75.522140][ T9067] RIP: 0023:0xf7f96a39 [ 75.522153][ T9067] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 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 [ 75.522159][ T9067] RSP: 002b:00000000ffadb02c EFLAGS: 00000246 ORIG_RAX: 0000000000000004 [ 75.522171][ T9067] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020000200 [ 75.522179][ T9067] RDX: 0000000000000078 RSI: 00000000080eb080 RDI: 00000000ffadb080 [ 75.522186][ T9067] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 75.522193][ T9067] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 75.522200][ T9067] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 75.522211][ T9067] Modules linked in: [ 75.522220][ T9067] CR2: 000000010000000e [ 75.522233][ T9067] ---[ end trace 52595bf50cccea5b ]--- [ 75.522248][ T9067] RIP: 0010:do_con_trol+0x47ea/0x61b0 [ 75.522260][ T9067] Code: 08 2c 01 0f 8e b1 00 00 00 4c 8b bd 08 ff ff ff 48 63 db 44 89 e9 41 0f b7 84 24 c8 03 00 00 48 01 db d1 e9 49 01 df 4c 89 ff 66 ab 49 8d bc 24 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 [ 75.522266][ T9067] RSP: 0018:ffffc90001da78a0 EFLAGS: 00010202 [ 75.522276][ T9067] RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001 [ 75.522284][ T9067] RDX: 1ffff11012ddac79 RSI: ffffffff83e103ed RDI: 000000010000000e [ 75.522292][ T9067] RBP: ffffc90001da79c0 R08: ffff8880991f8580 R09: ffff8880991f8e10 [ 75.522299][ T9067] R10: fffffbfff14f3330 R11: ffffffff8a799987 R12: ffff888096ed6000 [ 75.522307][ T9067] R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e [ 75.522316][ T9067] FS: 0000000000000000(0000) GS:ffff8880ae900000(0063) knlGS:0000000009289840 [ 75.522325][ T9067] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 75.522333][ T9067] CR2: 000000010000000e CR3: 00000000a7a69000 CR4: 00000000001406e0 [ 75.522343][ T9067] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.522351][ T9067] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.522357][ T9067] Kernel panic - not syncing: Fatal exception [ 75.524087][ T9067] Kernel Offset: disabled [ 76.035915][ T9067] Rebooting in 86400 seconds..