[....] Starting enhanced syslogd: rsyslogd[ 15.898775] audit: type=1400 audit(1519812725.849:5): avc: denied { syslog } for pid=3971 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: [ 18.550272] audit: type=1400 audit(1519812728.501:6): avc: denied { map } for pid=4110 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 '10.128.0.17' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 40.330422] audit: type=1400 audit(1519812750.281:7): avc: denied { map } for pid=4128 comm="syzkaller249191" path="/root/syzkaller249191515" 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 RTNETLINK answers: Operation not supported [ 40.729493] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 41.060541] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 41.066631] 8021q: adding VLAN 0 to HW filter on device bond0 executing program executing program [ 41.101177] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 41.136846] 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 [ 42.094162] kasan: CONFIG_KASAN_INLINE enabled [ 42.098867] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 42.106242] general protection fault: 0000 [#1] SMP KASAN [ 42.111760] Dumping ftrace buffer: [ 42.115271] (ftrace buffer empty) [ 42.118951] Modules linked in: [ 42.122117] CPU: 1 PID: 4474 Comm: syzkaller249191 Not tainted 4.16.0-rc3+ #332 [ 42.129530] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.138860] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 42.143930] RSP: 0018:ffff8801b8cbf9a8 EFLAGS: 00010202 [ 42.149262] RAX: dffffc0000000000 RBX: ffff8801b8cc0940 RCX: ffffffff854a6dd0 [ 42.156502] RDX: 0000000000000045 RSI: 000000001524ff0e RDI: 0000000000000228 [ 42.163741] RBP: ffff8801b8cbfc28 R08: 1ffff10037197e77 R09: 0000000000000002 [ 42.170981] R10: ffff8801b8cbf878 R11: 0000000000000000 R12: ffff8801b8c9f680 [ 42.178229] R13: ffff8801b8cbfc00 R14: 0000000000000000 R15: ffff8801b8cbfae0 [ 42.185470] FS: 00007f311dc94700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 42.193666] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.199517] CR2: 0000000020e71000 CR3: 00000001bd257002 CR4: 00000000001606e0 [ 42.206766] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.214014] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.221257] Call Trace: [ 42.223823] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 42.228986] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 42.234320] ? selinux_socket_connect+0x311/0x730 [ 42.239137] ? lock_downgrade+0x980/0x980 [ 42.243259] ? selinux_socket_setsockopt+0x80/0x80 [ 42.248156] ? lock_release+0xa40/0xa40 [ 42.252105] ? check_same_owner+0x320/0x320 [ 42.256396] ? __check_object_size+0x8b/0x530 [ 42.260863] ? __might_sleep+0x95/0x190 [ 42.264814] ? security_socket_connect+0x89/0xb0 [ 42.269544] SYSC_connect+0x213/0x4a0 [ 42.273321] ? SYSC_bind+0x410/0x410 [ 42.277013] ? __handle_mm_fault+0x38c0/0x38c0 [ 42.281566] ? vmacache_find+0x5f/0x280 [ 42.285510] ? vmacache_update+0xfe/0x130 [ 42.289639] ? mm_fault_error+0x2c0/0x2c0 [ 42.293756] ? move_addr_to_kernel+0x60/0x60 [ 42.298138] SyS_connect+0x24/0x30 [ 42.301647] ? SyS_accept+0x30/0x30 [ 42.305243] do_syscall_64+0x281/0x940 [ 42.309099] ? __do_page_fault+0xc90/0xc90 [ 42.313301] ? _raw_spin_unlock_irq+0x27/0x70 [ 42.317764] ? finish_task_switch+0x1c1/0x7e0 [ 42.322228] ? syscall_return_slowpath+0x550/0x550 [ 42.327127] ? syscall_return_slowpath+0x2ac/0x550 [ 42.332031] ? prepare_exit_to_usermode+0x350/0x350 [ 42.337021] ? retint_user+0x18/0x18 [ 42.340712] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.345528] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 42.350772] RIP: 0033:0x4477c9 [ 42.353934] RSP: 002b:00007f311dc93db8 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 42.361612] RAX: ffffffffffffffda RBX: 00000000006e3a04 RCX: 00000000004477c9 [ 42.368858] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000004 [ 42.376101] RBP: 00000000006e3a00 R08: 0000000000000000 R09: 0000000000000000 [ 42.383342] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 [ 42.390910] R13: 00007ffc3cce85af R14: 00007f311dc949c0 R15: 0000000000000001 [ 42.398158] 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 [ 42.417226] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b8cbf9a8 [ 42.423958] ---[ end trace c6980d6702e29450 ]--- [ 42.428711] Kernel panic - not syncing: Fatal exception [ 42.434462] Dumping ftrace buffer: [ 42.437975] (ftrace buffer empty) [ 42.441653] Kernel Offset: disabled [ 42.445249] Rebooting in 86400 seconds..