[ 89.386454][ T27] audit: type=1800 audit(1580748473.995:28): pid=9681 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 89.962010][ T9748] sshd (9748) used greatest stack depth: 22776 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 90.303916][ T27] audit: type=1800 audit(1580748474.995:29): pid=9681 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 [ 90.324338][ T27] audit: type=1800 audit(1580748475.005:30): pid=9681 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 '10.128.0.74' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 111.580945][ T9834] BUG: unable to handle page fault for address: 000000010000000e [ 111.580955][ T9834] #PF: supervisor write access in kernel mode [ 111.580961][ T9834] #PF: error_code(0x0002) - not-present page [ 111.580966][ T9834] PGD a70a5067 P4D a70a5067 PUD 0 [ 111.580985][ T9834] Oops: 0002 [#1] PREEMPT SMP KASAN [ 111.580999][ T9834] CPU: 0 PID: 9834 Comm: syz-executor491 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0 [ 111.581006][ T9834] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 111.581027][ T9834] RIP: 0010:do_con_trol+0x47ea/0x61b0 [ 111.581039][ T9834] 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 [ 111.581046][ T9834] RSP: 0018:ffffc90001fe78b0 EFLAGS: 00010202 [ 111.581056][ T9834] RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001 [ 111.581064][ T9834] RDX: 1ffff110133bc479 RSI: ffffffff83f285ed RDI: 000000010000000e [ 111.581073][ T9834] RBP: ffffc90001fe79d0 R08: ffff8880a8546600 R09: ffff8880a8546e98 [ 111.581081][ T9834] R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: ffff888099de2000 [ 111.581089][ T9834] R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e [ 111.581099][ T9834] FS: 0000000000cd6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 111.581106][ T9834] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 111.581113][ T9834] CR2: 000000010000000e CR3: 0000000093666000 CR4: 00000000001406f0 [ 111.581124][ T9834] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 111.581130][ T9834] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 111.581134][ T9834] Call Trace: [ 111.581148][ T9834] ? reset_palette+0x190/0x190 [ 111.581163][ T9834] ? __kasan_check_read+0x11/0x20 [ 111.581178][ T9834] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 111.581192][ T9834] do_con_write.part.0+0xfd9/0x1ef0 [ 111.581211][ T9834] ? do_con_trol+0x61b0/0x61b0 [ 111.581228][ T9834] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 111.581241][ T9834] ? add_wait_queue+0x112/0x170 [ 111.581255][ T9834] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 111.581272][ T9834] ? trace_hardirqs_on+0x67/0x240 [ 111.581288][ T9834] con_write+0x46/0xd0 [ 111.581302][ T9834] n_tty_write+0x40e/0x1080 [ 111.581323][ T9834] ? n_tty_read+0x1bf0/0x1bf0 [ 111.581338][ T9834] ? prepare_to_wait_exclusive+0x320/0x320 [ 111.581357][ T9834] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 111.581373][ T9834] ? _copy_from_user+0x12c/0x1a0 [ 111.581390][ T9834] tty_write+0x496/0x7f0 [ 111.581404][ T9834] ? n_tty_read+0x1bf0/0x1bf0 [ 111.581422][ T9834] __vfs_write+0x8a/0x110 [ 111.581437][ T9834] ? hung_up_tty_compat_ioctl+0x40/0x40 [ 111.581453][ T9834] vfs_write+0x268/0x5d0 [ 111.581470][ T9834] ksys_write+0x14f/0x290 [ 111.581487][ T9834] ? __ia32_sys_read+0xb0/0xb0 [ 111.581503][ T9834] ? do_syscall_64+0x26/0x790 [ 111.581519][ T9834] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 111.581532][ T9834] ? do_syscall_64+0x26/0x790 [ 111.581548][ T9834] __x64_sys_write+0x73/0xb0 [ 111.581563][ T9834] do_syscall_64+0xfa/0x790 [ 111.581586][ T9834] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 111.581596][ T9834] RIP: 0033:0x4404f9 [ 111.581610][ T9834] 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 [ 111.581617][ T9834] RSP: 002b:00007ffd2f67f958 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 111.581629][ T9834] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 111.581637][ T9834] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 111.581645][ T9834] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 111.581653][ T9834] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 111.581660][ T9834] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 111.581672][ T9834] Modules linked in: [ 111.581681][ T9834] CR2: 000000010000000e [ 111.581694][ T9834] ---[ end trace 89ccbe7b89f162fc ]--- [ 111.581709][ T9834] RIP: 0010:do_con_trol+0x47ea/0x61b0 [ 111.581722][ T9834] 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 [ 111.581730][ T9834] RSP: 0018:ffffc90001fe78b0 EFLAGS: 00010202 [ 111.581740][ T9834] RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001 [ 111.581748][ T9834] RDX: 1ffff110133bc479 RSI: ffffffff83f285ed RDI: 000000010000000e [ 111.581765][ T9834] RBP: ffffc90001fe79d0 R08: ffff8880a8546600 R09: ffff8880a8546e98 [ 111.581774][ T9834] R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: ffff888099de2000 [ 111.581782][ T9834] R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e [ 111.581793][ T9834] FS: 0000000000cd6880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 111.581802][ T9834] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 111.581811][ T9834] CR2: 000000010000000e CR3: 0000000093666000 CR4: 00000000001406f0 [ 111.581821][ T9834] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 111.581829][ T9834] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 111.581836][ T9834] Kernel panic - not syncing: Fatal exception [ 111.583617][ T9834] Kernel Offset: disabled [ 112.101378][ T9834] Rebooting in 86400 seconds..