[....] Starting enhanced syslogd: rsyslogd[ 17.328866] audit: type=1400 audit(1517781974.723:5): avc: denied { syslog } for pid=4018 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.855959] audit: type=1400 audit(1517781980.250:6): avc: denied { map } for pid=4158 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. executing program [ 68.915888] audit: type=1400 audit(1517782026.310:7): avc: denied { map } for pid=4174 comm="syzkaller298315" path="/root/syzkaller298315599" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 68.929637] IPVS: ftp: loaded support on port[0] = 21 executing program [ 68.969464] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 68.995615] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.033210] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.066487] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.105885] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.158172] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.220371] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.978601] kasan: CONFIG_KASAN_INLINE enabled [ 69.983345] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 69.990782] general protection fault: 0000 [#1] SMP KASAN [ 69.996295] Dumping ftrace buffer: [ 69.999806] (ftrace buffer empty) [ 70.003488] Modules linked in: [ 70.006655] CPU: 1 PID: 4593 Comm: syzkaller298315 Not tainted 4.15.0+ #296 [ 70.013721] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.023056] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.028135] RSP: 0018:ffff8801aef2faf0 EFLAGS: 00010202 [ 70.033469] RAX: dffffc0000000000 RBX: ffff8801ae5d6b80 RCX: ffffffff851a5940 [ 70.040708] RDX: 0000000000000045 RSI: 00000000b204cc5e RDI: 0000000000000228 [ 70.047948] RBP: ffff8801aef2fd70 R08: 1ffff10035de5e9f R09: 0000000000000002 [ 70.055188] R10: ffff8801aef2f9c0 R11: 0000000000000000 R12: ffff8801adc06900 [ 70.062432] R13: ffff8801aef2fd48 R14: 0000000000000000 R15: ffff8801aef2fc28 [ 70.069674] FS: 0000000002480940(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.077882] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.083736] CR2: 00000000205fafd2 CR3: 00000001ae777001 CR4: 00000000001606e0 [ 70.090979] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.098218] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.105457] Call Trace: [ 70.108025] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 70.113200] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 70.118538] ? selinux_socket_connect+0x311/0x730 [ 70.123356] ? lock_downgrade+0x980/0x980 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.127474] ? lock_downgrade+0x980/0x980 [ 70.131596] ? selinux_socket_setsockopt+0x80/0x80 [ 70.136494] ? lock_release+0xa40/0xa40 [ 70.140440] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 70.146298] ? __check_object_size+0x8b/0x530 [ 70.150768] ? handle_mm_fault+0x476/0x930 [ 70.154975] ? __might_sleep+0x95/0x190 [ 70.159106] ? security_socket_connect+0x89/0xb0 [ 70.163839] SYSC_connect+0x213/0x4a0 [ 70.167703] ? SYSC_bind+0x410/0x410 [ 70.171393] ? do_page_fault+0xee/0x720 [ 70.175340] ? __do_page_fault+0xc90/0xc90 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.179549] ? sock_map_fd+0x53/0x90 [ 70.183237] ? SyS_socket+0x12d/0x1d0 [ 70.187023] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 70.191840] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 70.196829] SyS_connect+0x24/0x30 [ 70.200356] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 70.205084] RIP: 0033:0x442429 [ 70.208245] RSP: 002b:00007ffff1239678 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 70.215923] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442429 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 70.223163] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 70.230412] RBP: 00000000006d0720 R08: 00000000006d0720 R09: 00000000006d0720 [ 70.237679] R10: 00000000006d0720 R11: 0000000000000246 R12: 00007ffff12396a0 [ 70.244955] R13: 0000000000000000 R14: 00000000006d10a8 R15: 0000000000000027 [ 70.252238] Code: fe ff ff e8 70 4c 56 fc 4c 89 fa 49 8d be 28 02 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 c6 04 02 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 df 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 70.271414] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801aef2faf0 executing program executing program [ 70.278503] ---[ end trace 35f012ed83fc26a8 ]--- [ 70.283253] Kernel panic - not syncing: Fatal exception [ 70.288955] Dumping ftrace buffer: [ 70.292488] (ftrace buffer empty) [ 70.296173] Kernel Offset: disabled [ 70.299771] Rebooting in 86400 seconds..