[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 53.789578][ T27] audit: type=1800 audit(1579138722.777:25): pid=8598 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 53.808570][ T27] audit: type=1800 audit(1579138722.777:26): pid=8598 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.869634][ T27] audit: type=1800 audit(1579138722.777:27): pid=8598 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.10.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.551293][ T8751] BUG: unable to handle page fault for address: 000000010000000e [ 65.551300][ T8751] #PF: supervisor write access in kernel mode [ 65.551306][ T8751] #PF: error_code(0x0002) - not-present page [ 65.551309][ T8751] PGD 9e8e1067 P4D 9e8e1067 PUD 0 [ 65.551322][ T8751] Oops: 0002 [#1] PREEMPT SMP KASAN [ 65.551332][ T8751] CPU: 0 PID: 8751 Comm: syz-executor043 Not tainted 5.5.0-rc6-syzkaller #0 [ 65.551337][ T8751] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.551350][ T8751] RIP: 0010:csi_J+0x6c7/0xa80 [ 65.551358][ T8751] Code: 3b 49 8d 9e c8 03 00 00 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 53 01 00 00 0f b7 03 44 89 e1 81 e1 ff ff ff 7f 4c 89 ff 66 ab 48 c7 c3 5c 8f 44 89 48 c7 c7 5c 8f 44 89 be 04 00 00 00 [ 65.551363][ T8751] RSP: 0018:ffffc90001ee7830 EFLAGS: 00010202 [ 65.551370][ T8751] RAX: 0000000000000720 RBX: ffff8880a7cb73c8 RCX: 0000000000000001 [ 65.551375][ T8751] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000010000000e [ 65.551380][ T8751] RBP: ffffc90001ee7870 R08: ffffffff83f954a1 R09: ffffffff83f9522d [ 65.551385][ T8751] R10: ffff88808f1a81c0 R11: 0000000000000004 R12: 7fffffff80000001 [ 65.551391][ T8751] R13: dffffc0000000000 R14: ffff8880a7cb7000 R15: 000000010000000e [ 65.551399][ T8751] FS: 00000000018af880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 65.551404][ T8751] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.551409][ T8751] CR2: 000000010000000e CR3: 00000000a3c14000 CR4: 00000000001406f0 [ 65.551419][ T8751] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.551423][ T8751] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.551426][ T8751] Call Trace: [ 65.551437][ T8751] do_con_write+0x7183/0xf360 [ 65.551471][ T8751] ? _raw_spin_unlock_irqrestore+0x72/0xe0 [ 65.551484][ T8751] ? _raw_spin_unlock_irqrestore+0xb7/0xe0 [ 65.551494][ T8751] con_write+0x25/0x40 [ 65.551504][ T8751] n_tty_write+0xd0c/0x1200 [ 65.551521][ T8751] ? wait_woken+0x230/0x230 [ 65.551531][ T8751] tty_write+0x5a1/0x950 [ 65.551540][ T8751] ? n_tty_read+0x1bc0/0x1bc0 [ 65.551549][ T8751] ? redirected_tty_write+0xb0/0xb0 [ 65.551562][ T8751] __vfs_write+0xb8/0x740 [ 65.551575][ T8751] ? security_file_permission+0x147/0x340 [ 65.551587][ T8751] ? rw_verify_area+0x1c2/0x360 [ 65.551597][ T8751] vfs_write+0x270/0x580 [ 65.551607][ T8751] ksys_write+0x117/0x220 [ 65.551618][ T8751] __x64_sys_write+0x7b/0x90 [ 65.551630][ T8751] do_syscall_64+0xf7/0x1c0 [ 65.551641][ T8751] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.551648][ T8751] RIP: 0033:0x4404f9 [ 65.551657][ T8751] 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 [ 65.551662][ T8751] RSP: 002b:00007ffe37f8e118 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 65.551670][ T8751] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 65.551674][ T8751] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 65.551679][ T8751] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 65.551683][ T8751] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 65.551688][ T8751] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 65.551698][ T8751] Modules linked in: [ 65.551706][ T8751] CR2: 000000010000000e [ 65.551716][ T8751] ---[ end trace 0426c9c4e025bc85 ]--- [ 65.551725][ T8751] RIP: 0010:csi_J+0x6c7/0xa80 [ 65.551732][ T8751] Code: 3b 49 8d 9e c8 03 00 00 48 89 d8 48 c1 e8 03 42 8a 04 28 84 c0 0f 85 53 01 00 00 0f b7 03 44 89 e1 81 e1 ff ff ff 7f 4c 89 ff 66 ab 48 c7 c3 5c 8f 44 89 48 c7 c7 5c 8f 44 89 be 04 00 00 00 [ 65.551737][ T8751] RSP: 0018:ffffc90001ee7830 EFLAGS: 00010202 [ 65.551743][ T8751] RAX: 0000000000000720 RBX: ffff8880a7cb73c8 RCX: 0000000000000001 [ 65.551748][ T8751] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000010000000e [ 65.551754][ T8751] RBP: ffffc90001ee7870 R08: ffffffff83f954a1 R09: ffffffff83f9522d [ 65.551759][ T8751] R10: ffff88808f1a81c0 R11: 0000000000000004 R12: 7fffffff80000001 [ 65.551764][ T8751] R13: dffffc0000000000 R14: ffff8880a7cb7000 R15: 000000010000000e [ 65.551771][ T8751] FS: 00000000018af880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 65.551776][ T8751] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.551781][ T8751] CR2: 000000010000000e CR3: 00000000a3c14000 CR4: 00000000001406f0 [ 65.551786][ T8751] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.551791][ T8751] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.551796][ T8751] Kernel panic - not syncing: Fatal exception [ 65.553273][ T8751] Kernel Offset: disabled [ 66.007026][ T8751] Rebooting in 86400 seconds..