[....] Starting enhanced syslogd: rsyslogd[ 16.081012] audit: type=1400 audit(1517750647.984:5): avc: denied { syslog } for pid=3990 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: [ 18.543094] audit: type=1400 audit(1517750650.446:6): avc: denied { map } for pid=4128 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 '10.128.15.192' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 65.998592] audit: type=1400 audit(1517750697.902:7): avc: denied { map } for pid=4146 comm="syzkaller378068" path="/root/syzkaller378068262" 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 [ 66.273486] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 69.606129] kasan: CONFIG_KASAN_INLINE enabled [ 69.610812] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 69.618208] general protection fault: 0000 [#1] SMP KASAN [ 69.623722] Dumping ftrace buffer: [ 69.627242] (ftrace buffer empty) [ 69.630935] Modules linked in: [ 69.634105] CPU: 0 PID: 4761 Comm: syzkaller378068 Not tainted 4.15.0+ #296 [ 69.641174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.650889] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 69.655979] RSP: 0018:ffff8801af86faf0 EFLAGS: 00010202 [ 69.661317] RAX: dffffc0000000000 RBX: ffff8801d9178b40 RCX: ffffffff851a5940 [ 69.668563] RDX: 0000000000000045 RSI: 0000000049049fbf RDI: 0000000000000228 [ 69.675805] RBP: ffff8801af86fd70 R08: 1ffff10035f0de9f R09: 0000000000000002 [ 69.683048] R10: ffff8801af86f9c0 R11: 0000000000000000 R12: ffff8801d886b6c0 [ 69.690294] R13: ffff8801af86fd48 R14: 0000000000000000 R15: ffff8801af86fc28 [ 69.697540] FS: 0000000001906880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 69.705747] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.711610] CR2: 00000000205fafd2 CR3: 00000001af92e004 CR4: 00000000001606f0 [ 69.718867] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.726114] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.733356] Call Trace: [ 69.735926] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 69.741093] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 69.746437] ? selinux_socket_connect+0x311/0x730 [ 69.751257] ? lock_downgrade+0x980/0x980 [ 69.755378] ? lock_downgrade+0x980/0x980 [ 69.759505] ? selinux_socket_setsockopt+0x80/0x80 [ 69.764414] ? lock_release+0xa40/0xa40 [ 69.768361] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 69.774221] ? __check_object_size+0x8b/0x530 [ 69.778690] ? handle_mm_fault+0x476/0x930 [ 69.782908] ? __might_sleep+0x95/0x190 [ 69.786860] ? security_socket_connect+0x89/0xb0 [ 69.791591] SYSC_connect+0x213/0x4a0 [ 69.795367] ? SYSC_bind+0x410/0x410 [ 69.799068] ? do_page_fault+0xee/0x720 [ 69.803016] ? __do_page_fault+0xc90/0xc90 [ 69.807227] ? sock_map_fd+0x53/0x90 [ 69.810917] ? SyS_socket+0x12d/0x1d0 [ 69.814699] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 69.819525] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 69.824516] SyS_connect+0x24/0x30 [ 69.828030] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 69.832756] RIP: 0033:0x446229 [ 69.835937] RSP: 002b:00007ffc7c5da5d8 EFLAGS: 00000203 ORIG_RAX: 000000000000002a [ 69.843623] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 0000000000446229 [ 69.850864] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000005 [ 69.858105] RBP: 00000000006d4720 R08: 0000000000000000 R09: 0000000000000000 [ 69.865347] R10: 0000000000000000 R11: 0000000000000203 R12: 00007ffc7c5da600 [ 69.872590] R13: 0000000000000000 R14: 00000000006d50a8 R15: 00000000000001cb [ 69.879849] 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 [ 69.898929] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801af86faf0 [ 69.905556] ---[ end trace c9efc6e726a94461 ]--- [ 69.910302] Kernel panic - not syncing: Fatal exception [ 69.916002] Dumping ftrace buffer: [ 69.919527] (ftrace buffer empty) [ 69.923211] Kernel Offset: disabled [ 69.926820] Rebooting in 86400 seconds..