[....] Starting enhanced syslogd: rsyslogd[ 16.939568] audit: type=1400 audit(1518769903.116:5): avc: denied { syslog } for pid=4031 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: [ 22.691102] audit: type=1400 audit(1518769908.867:6): avc: denied { map } for pid=4172 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 '10.128.0.37' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 28.979317] audit: type=1400 audit(1518769915.156:7): avc: denied { map } for pid=4186 comm="syzkaller935540" path="/root/syzkaller935540577" 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 RTNETLINK answers: Operation not supported [ 29.221366] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.484072] kasan: CONFIG_KASAN_INLINE enabled [ 33.488777] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.496297] general protection fault: 0000 [#1] SMP KASAN [ 33.501819] Dumping ftrace buffer: [ 33.505328] (ftrace buffer empty) [ 33.509011] Modules linked in: [ 33.512184] CPU: 0 PID: 5191 Comm: syzkaller935540 Not tainted 4.16.0-rc1+ #224 [ 33.519602] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.528938] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 33.534010] RSP: 0018:ffff8801d804f958 EFLAGS: 00010202 [ 33.539348] RAX: dffffc0000000000 RBX: ffff8801c6177640 RCX: ffffffff851b3ed0 [ 33.546587] RDX: 0000000000000045 RSI: 0000000024deec74 RDI: 0000000000000228 [ 33.553827] RBP: ffff8801d804fbd8 R08: 1ffff1003b009e6d R09: 0000000000000002 [ 33.561070] R10: ffff8801d804f828 R11: 0000000000000000 R12: ffff8801c522ed80 [ 33.568310] R13: ffff8801d804fbb0 R14: 0000000000000000 R15: ffff8801d804fa90 [ 33.575552] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:00000000f7f54b40 [ 33.583747] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.589598] CR2: 00000000205fafd2 CR3: 00000001be4e8002 CR4: 00000000001606f0 [ 33.596842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.604086] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.611326] Call Trace: [ 33.613892] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 33.619071] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 33.624407] ? selinux_socket_connect+0x311/0x730 [ 33.629220] ? lock_downgrade+0x980/0x980 [ 33.633341] ? selinux_socket_setsockopt+0x80/0x80 [ 33.638241] ? lock_release+0xa40/0xa40 [ 33.642188] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 33.648065] ? __check_object_size+0x8b/0x530 [ 33.652533] ? __might_sleep+0x95/0x190 [ 33.656485] ? security_socket_connect+0x89/0xb0 [ 33.661212] SYSC_connect+0x213/0x4a0 [ 33.664990] ? SYSC_bind+0x410/0x410 [ 33.668679] ? handle_mm_fault+0x43b/0x970 [ 33.672885] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 33.677439] ? vmacache_find+0x5f/0x280 [ 33.681393] ? up_read+0x1a/0x40 [ 33.684736] ? __do_page_fault+0x3d6/0xc90 [ 33.688947] SyS_connect+0x24/0x30 [ 33.692456] ? SyS_accept+0x30/0x30 [ 33.696057] do_fast_syscall_32+0x3ec/0xf9f [ 33.700350] ? do_int80_syscall_32+0x9c0/0x9c0 [ 33.704900] ? finish_task_switch+0x1c0/0x860 [ 33.709365] ? finish_task_switch+0x181/0x860 [ 33.713833] ? syscall_return_slowpath+0x2ac/0x550 [ 33.718735] ? prepare_exit_to_usermode+0x350/0x350 [ 33.723721] ? retint_user+0x18/0x18 [ 33.727408] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.732224] entry_SYSENTER_compat+0x70/0x7f [ 33.736602] RIP: 0023:0xf7f58c79 [ 33.739935] RSP: 002b:00000000f7f541fc EFLAGS: 00000246 ORIG_RAX: 000000000000016a [ 33.747611] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000205fafd2 [ 33.754851] RDX: 000000000000002e RSI: 0000000000000000 RDI: 0000000000000000 [ 33.762091] RBP: 00000000003d0f00 R08: 0000000000000000 R09: 0000000000000000 [ 33.769330] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.776578] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.783825] Code: fe ff ff e8 00 cd 55 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 [ 33.802887] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d804f958 [ 33.809717] ---[ end trace a5745a128052dd7c ]--- [ 33.814493] Kernel panic - not syncing: Fatal exception [ 33.820255] Dumping ftrace buffer: [ 33.823768] (ftrace buffer empty) [ 33.827449] Kernel Offset: disabled [ 33.831066] Rebooting in 86400 seconds..