[....] Starting enhanced syslogd: rsyslogd[ 17.581365] audit: type=1400 audit(1517337457.899:5): avc: denied { syslog } for pid=4033 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: [ 23.362748] audit: type=1400 audit(1517337463.680:6): avc: denied { map } for pid=4174 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 '10.128.0.46' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 32.180837] audit: type=1400 audit(1517337472.498:7): avc: denied { map } for pid=4189 comm="syzkaller247714" path="/root/syzkaller247714587" 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 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 32.570751] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 35.646088] kasan: CONFIG_KASAN_INLINE enabled [ 35.650725] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 35.658103] general protection fault: 0000 [#1] SMP KASAN [ 35.663613] Dumping ftrace buffer: [ 35.667122] (ftrace buffer empty) [ 35.670805] Modules linked in: [ 35.673972] CPU: 1 PID: 5212 Comm: syzkaller247714 Not tainted 4.15.0+ #286 [ 35.681038] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.690378] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 35.695450] RSP: 0018:ffff8801abbafaf0 EFLAGS: 00010202 [ 35.700779] RAX: dffffc0000000000 RBX: ffff8801ccd105c0 RCX: ffffffff85121570 [ 35.708016] RDX: 0000000000000045 RSI: 000000000368cdc1 RDI: 0000000000000228 [ 35.715260] RBP: ffff8801abbafd70 R08: 1ffff10035775e9f R09: 0000000000000002 [ 35.722505] R10: ffff8801abbaf9c0 R11: 0000000000000000 R12: ffff8801d9f9b680 [ 35.729742] R13: ffff8801abbafd48 R14: 0000000000000000 R15: ffff8801abbafc28 [ 35.736982] FS: 00007f9d67911700(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 35.745181] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.751032] CR2: 00000000205fafd2 CR3: 00000001c95f3003 CR4: 00000000001606e0 [ 35.758272] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.765517] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.772757] Call Trace: [ 35.775325] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 35.780492] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 35.785828] ? selinux_socket_connect+0x311/0x730 [ 35.790644] ? lock_downgrade+0x980/0x980 [ 35.794762] ? selinux_socket_setsockopt+0x80/0x80 [ 35.799661] ? lock_release+0xa40/0xa40 [ 35.803627] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 35.809492] ? __check_object_size+0x25d/0x4f0 [ 35.814052] ? handle_mm_fault+0x410/0x8d0 [ 35.818259] ? __might_sleep+0x95/0x190 [ 35.822207] ? security_socket_connect+0x89/0xb0 [ 35.826932] SYSC_connect+0x213/0x4a0 [ 35.830702] ? SYSC_bind+0x410/0x410 [ 35.834388] ? do_page_fault+0xee/0x720 [ 35.838333] ? __do_page_fault+0xc90/0xc90 [ 35.842540] ? do_futex+0x22a0/0x22a0 [ 35.846307] ? SyS_socket+0x12d/0x1d0 [ 35.850076] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 35.854890] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 35.859877] SyS_connect+0x24/0x30 [ 35.863386] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 35.868110] RIP: 0033:0x44abf9 [ 35.871269] RSP: 002b:00007f9d67910db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 35.878965] RAX: ffffffffffffffda RBX: 00000000006dfbe4 RCX: 000000000044abf9 [ 35.886204] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000005 [ 35.893443] RBP: 00000000006dfbe0 R08: 0000000000000000 R09: 0000000000000000 [ 35.900683] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 35.907922] R13: 00007ffe0672a6df R14: 00007f9d679119c0 R15: 0000000000000001 [ 35.915171] Code: fe ff ff e8 f0 19 5e 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 e5 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 35.934240] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801abbafaf0 [ 35.940860] ---[ end trace b5a24c9f92aef739 ]--- [ 35.945604] Kernel panic - not syncing: Fatal exception [ 35.951344] Dumping ftrace buffer: [ 35.954858] (ftrace buffer empty) [ 35.958539] Kernel Offset: disabled [ 35.962140] Rebooting in 86400 seconds..