[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 93.434281][ T27] audit: type=1800 audit(1579148009.945:25): pid=9500 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 93.454965][ T27] audit: type=1800 audit(1579148009.945:26): pid=9500 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 93.484048][ T27] audit: type=1800 audit(1579148009.945:27): pid=9500 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 '10.128.0.225' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 118.189536][ T9651] BUG: unable to handle page fault for address: 000000010000000e [ 118.189546][ T9651] #PF: supervisor write access in kernel mode [ 118.189552][ T9651] #PF: error_code(0x0002) - not-present page [ 118.189557][ T9651] PGD 9824e067 P4D 9824e067 PUD 0 [ 118.189573][ T9651] Oops: 0002 [#1] PREEMPT SMP KASAN [ 118.189585][ T9651] CPU: 1 PID: 9651 Comm: syz-executor268 Not tainted 5.5.0-rc6-syzkaller #0 [ 118.189592][ T9651] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 118.189610][ T9651] RIP: 0010:csi_J+0x2bf/0xb00 [ 118.189623][ T9651] Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e af 06 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 66 ab 48 89 df e8 46 f2 ff ff 31 ff 41 89 c6 89 c6 e8 5a d5 88 [ 118.189630][ T9651] RSP: 0018:ffffc90001f8f860 EFLAGS: 00010202 [ 118.189639][ T9651] RAX: 0000000000000720 RBX: ffff88808afd7000 RCX: 0000000000000001 [ 118.189647][ T9651] RDX: 1ffff110115fae79 RSI: ffffffff83ec2116 RDI: 000000010000000e [ 118.189655][ T9651] RBP: ffffc90001f8f8a0 R08: ffff888095fa60c0 R09: ffff888095fa6950 [ 118.189663][ T9651] R10: fffffbfff14f6998 R11: ffffffff8a7b4cc7 R12: 000000010000000e [ 118.189671][ T9651] R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000 [ 118.189682][ T9651] FS: 000000000201b880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 118.189688][ T9651] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 118.189695][ T9651] CR2: 000000010000000e CR3: 00000000a2ed2000 CR4: 00000000001406e0 [ 118.189707][ T9651] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 118.189715][ T9651] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 118.189719][ T9651] Call Trace: [ 118.189736][ T9651] ? __atomic_notifier_call_chain+0xd6/0x1a0 [ 118.189751][ T9651] do_con_trol+0x50cc/0x61b0 [ 118.189767][ T9651] ? reset_palette+0x190/0x190 [ 118.189789][ T9651] ? __kasan_check_read+0x11/0x20 [ 118.189806][ T9651] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 118.189824][ T9651] do_con_write.part.0+0xfd9/0x1ef0 [ 118.189847][ T9651] ? do_con_trol+0x61b0/0x61b0 [ 118.189860][ T9651] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 118.189871][ T9651] ? add_wait_queue+0x112/0x170 [ 118.189882][ T9651] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 118.189899][ T9651] ? trace_hardirqs_on+0x67/0x240 [ 118.189915][ T9651] con_write+0x46/0xd0 [ 118.189931][ T9651] n_tty_write+0x40e/0x1080 [ 118.189952][ T9651] ? n_tty_read+0x1bf0/0x1bf0 [ 118.189965][ T9651] ? prepare_to_wait_exclusive+0x320/0x320 [ 118.189982][ T9651] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 118.189997][ T9651] ? _copy_from_user+0x12c/0x1a0 [ 118.190012][ T9651] tty_write+0x496/0x7f0 [ 118.190028][ T9651] ? n_tty_read+0x1bf0/0x1bf0 [ 118.190043][ T9651] __vfs_write+0x8a/0x110 [ 118.190056][ T9651] ? put_tty_driver+0x20/0x20 [ 118.190069][ T9651] vfs_write+0x268/0x5d0 [ 118.190082][ T9651] ksys_write+0x14f/0x290 [ 118.190095][ T9651] ? __ia32_sys_read+0xb0/0xb0 [ 118.190110][ T9651] ? do_syscall_64+0x26/0x790 [ 118.190121][ T9651] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 118.190133][ T9651] ? do_syscall_64+0x26/0x790 [ 118.190147][ T9651] __x64_sys_write+0x73/0xb0 [ 118.190160][ T9651] do_syscall_64+0xfa/0x790 [ 118.190174][ T9651] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 118.190184][ T9651] RIP: 0033:0x4404f9 [ 118.190198][ T9651] 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 [ 118.190205][ T9651] RSP: 002b:00007ffd311739d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 118.190218][ T9651] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 118.190226][ T9651] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 118.190234][ T9651] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 118.190242][ T9651] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 118.190250][ T9651] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 118.190262][ T9651] Modules linked in: [ 118.190272][ T9651] CR2: 000000010000000e [ 118.200965][ T9651] ---[ end trace 299595d3a941cbf6 ]--- [ 118.200987][ T9651] RIP: 0010:csi_J+0x2bf/0xb00 [ 118.201001][ T9651] Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e af 06 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 66 ab 48 89 df e8 46 f2 ff ff 31 ff 41 89 c6 89 c6 e8 5a d5 88 [ 118.201008][ T9651] RSP: 0018:ffffc90001f8f860 EFLAGS: 00010202 [ 118.201019][ T9651] RAX: 0000000000000720 RBX: ffff88808afd7000 RCX: 0000000000000001 [ 118.201027][ T9651] RDX: 1ffff110115fae79 RSI: ffffffff83ec2116 RDI: 000000010000000e [ 118.201035][ T9651] RBP: ffffc90001f8f8a0 R08: ffff888095fa60c0 R09: ffff888095fa6950 [ 118.201042][ T9651] R10: fffffbfff14f6998 R11: ffffffff8a7b4cc7 R12: 000000010000000e [ 118.201049][ T9651] R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000 [ 118.201061][ T9651] FS: 000000000201b880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 118.201069][ T9651] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 118.201078][ T9651] CR2: 00007f2b0ccc7000 CR3: 00000000a2ed2000 CR4: 00000000001406e0 [ 118.201089][ T9651] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 118.201096][ T9651] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 118.201104][ T9651] Kernel panic - not syncing: Fatal exception [ 118.202881][ T9651] Kernel Offset: disabled [ 118.720942][ T9651] Rebooting in 86400 seconds..