[....] Starting enhanced syslogd: rsyslogd[ 16.784277] audit: type=1400 audit(1519846885.493:5): avc: denied { syslog } for pid=4041 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 periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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: [ 22.751814] audit: type=1400 audit(1519846891.460:6): avc: denied { map } for pid=4182 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 '10.128.0.49' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 29.045053] audit: type=1400 audit(1519846897.753:7): avc: denied { map } for pid=4197 comm="syzkaller888099" path="/root/syzkaller888099062" 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: File exists RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 29.663130] 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 [ 30.024437] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.030535] 8021q: adding VLAN 0 to HW filter on device bond0 executing program executing program executing program executing program [ 30.067647] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.106732] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.693122] kasan: CONFIG_KASAN_INLINE enabled [ 33.697987] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.705386] general protection fault: 0000 [#1] SMP KASAN [ 33.710905] Dumping ftrace buffer: [ 33.714415] (ftrace buffer empty) [ 33.718095] Modules linked in: [ 33.721261] CPU: 1 PID: 4898 Comm: syzkaller888099 Not tainted 4.16.0-rc3+ #332 [ 33.728675] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.738014] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 33.743100] RSP: 0018:ffff8801b07ef9a8 EFLAGS: 00010202 [ 33.748435] RAX: dffffc0000000000 RBX: ffff8801d68ed500 RCX: ffffffff854a6dd0 [ 33.755679] RDX: 0000000000000045 RSI: 00000000f70107c6 RDI: 0000000000000228 [ 33.762920] RBP: ffff8801b07efc28 R08: 1ffff100360fde77 R09: 0000000000000002 [ 33.770176] R10: ffff8801b07ef878 R11: 0000000000000000 R12: ffff8801d5a11680 [ 33.777419] R13: ffff8801b07efc00 R14: 0000000000000000 R15: ffff8801b07efae0 [ 33.784672] FS: 0000000001689880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 33.792875] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.798733] CR2: 00000000205fafd2 CR3: 00000001d6bfe002 CR4: 00000000001606e0 [ 33.805982] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.813229] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.820471] Call Trace: [ 33.823045] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 33.828211] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 33.833557] ? selinux_socket_connect+0x311/0x730 [ 33.838378] ? lock_downgrade+0x980/0x980 [ 33.842525] ? selinux_socket_setsockopt+0x80/0x80 [ 33.847434] ? lock_release+0xa40/0xa40 [ 33.851384] ? check_same_owner+0x320/0x320 [ 33.855681] ? __check_object_size+0x8b/0x530 [ 33.860156] ? __might_sleep+0x95/0x190 [ 33.864112] ? security_socket_connect+0x89/0xb0 [ 33.868843] SYSC_connect+0x213/0x4a0 [ 33.872623] ? SYSC_bind+0x410/0x410 [ 33.876320] ? __handle_mm_fault+0x38c0/0x38c0 [ 33.880875] ? vmacache_find+0x5f/0x280 [ 33.884828] ? vmacache_update+0xfe/0x130 [ 33.888958] ? mm_fault_error+0x2c0/0x2c0 [ 33.893079] ? move_addr_to_kernel+0x60/0x60 [ 33.897466] SyS_connect+0x24/0x30 [ 33.900979] ? SyS_accept+0x30/0x30 [ 33.904588] do_syscall_64+0x281/0x940 [ 33.908455] ? __do_page_fault+0xc90/0xc90 [ 33.912668] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.917403] ? syscall_return_slowpath+0x550/0x550 [ 33.922305] ? syscall_return_slowpath+0x2ac/0x550 [ 33.927210] ? prepare_exit_to_usermode+0x350/0x350 [ 33.932200] ? retint_user+0x18/0x18 [ 33.935892] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.940712] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 33.945871] RIP: 0033:0x4422e9 [ 33.949037] RSP: 002b:00007fff5f8d3cc8 EFLAGS: 00000217 ORIG_RAX: 000000000000002a [ 33.956719] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004422e9 [ 33.963960] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 33.971207] RBP: 0000000000008392 R08: 000000000168a6b0 R09: 000000000168a6b0 [ 33.978449] R10: 000000000168a6b0 R11: 0000000000000217 R12: 0000000000000000 [ 33.985693] R13: 00000000006cf448 R14: 0000000000000000 R15: 0000000000000000 [ 33.992961] Code: fe ff ff e8 70 86 26 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 [ 34.012070] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b07ef9a8 [ 34.018880] ---[ end trace 03d46cbe2ad1504f ]--- [ 34.023638] Kernel panic - not syncing: Fatal exception [ 34.029414] Dumping ftrace buffer: [ 34.032927] (ftrace buffer empty) [ 34.036615] Kernel Offset: disabled [ 34.040219] Rebooting in 86400 seconds..