[....] Starting enhanced syslogd: rsyslogd[ 16.752527] audit: type=1400 audit(1519500473.711:5): avc: denied { syslog } for pid=4082 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: [ 21.631835] audit: type=1400 audit(1519500478.590:6): avc: denied { map } for pid=4219 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 '10.128.0.32' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 27.929738] audit: type=1400 audit(1519500484.888:7): avc: denied { map } for pid=4234 comm="syzkaller134151" path="/root/syzkaller134151656" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.186132] kasan: CONFIG_KASAN_INLINE enabled [ 36.190825] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 36.198427] general protection fault: 0000 [#1] SMP KASAN [ 36.203945] Dumping ftrace buffer: [ 36.207460] (ftrace buffer empty) [ 36.211139] Modules linked in: [ 36.214304] CPU: 0 PID: 5387 Comm: syzkaller134151 Not tainted 4.16.0-rc2+ #327 [ 36.221719] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.231052] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 36.236122] RSP: 0018:ffff8801aa14f9a8 EFLAGS: 00010202 [ 36.241456] RAX: dffffc0000000000 RBX: ffff8801bacd6500 RCX: ffffffff854ae0e0 [ 36.248696] RDX: 0000000000000045 RSI: 0000000049049fbf RDI: 0000000000000228 [ 36.255936] RBP: ffff8801aa14fc28 R08: 1ffff10035429e77 R09: 0000000000000002 [ 36.263186] R10: ffff8801aa14f878 R11: 0000000000000000 R12: ffff8801bbd4fb40 [ 36.270426] R13: ffff8801aa14fc00 R14: 0000000000000000 R15: ffff8801aa14fae0 [ 36.277671] FS: 0000000000798880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 36.285866] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 36.291718] CR2: 0000000020348fd2 CR3: 00000001baccb004 CR4: 00000000001606f0 [ 36.298967] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 36.306209] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 36.313452] Call Trace: [ 36.316020] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 36.321184] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 36.326521] ? selinux_socket_connect+0x311/0x730 [ 36.331336] ? lock_downgrade+0x980/0x980 [ 36.335465] ? selinux_socket_setsockopt+0x80/0x80 [ 36.340366] ? lock_release+0xa40/0xa40 [ 36.344322] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 36.350186] ? __check_object_size+0x8b/0x530 [ 36.354658] ? __might_sleep+0x95/0x190 [ 36.358609] ? security_socket_connect+0x89/0xb0 [ 36.363337] SYSC_connect+0x213/0x4a0 [ 36.367111] ? SYSC_bind+0x410/0x410 [ 36.370815] ? __handle_mm_fault+0x3b60/0x3b60 [ 36.375366] ? vmacache_find+0x5f/0x280 [ 36.379308] ? vmacache_update+0xfe/0x130 [ 36.383444] ? mm_fault_error+0x2c0/0x2c0 [ 36.387565] ? move_addr_to_kernel+0x60/0x60 [ 36.391947] ? SyS_accept+0x30/0x30 [ 36.395547] SyS_connect+0x24/0x30 [ 36.399072] do_syscall_64+0x280/0x940 [ 36.402932] ? __do_page_fault+0xc90/0xc90 [ 36.407140] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 36.411874] ? syscall_return_slowpath+0x550/0x550 [ 36.416783] ? syscall_return_slowpath+0x2ac/0x550 [ 36.421682] ? prepare_exit_to_usermode+0x350/0x350 [ 36.426670] ? retint_user+0x18/0x18 [ 36.430356] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 36.435170] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 36.440333] RIP: 0033:0x441449 [ 36.443492] RSP: 002b:00007ffd4a36f058 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 36.451169] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441449 [ 36.458409] RDX: 000000000000002e RSI: 0000000020348fd2 RDI: 0000000000000004 [ 36.465649] RBP: 0000000000008d4f R08: 0000000000000000 R09: 0000000000000000 [ 36.472890] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 36.480129] R13: 00000000006cd428 R14: 0000000000000000 R15: 0000000000000000 [ 36.487376] Code: fe ff ff e8 c0 2b 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 [ 36.506448] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801aa14f9a8 [ 36.513090] ---[ end trace f06d815a3a4a6001 ]--- [ 36.517841] Kernel panic - not syncing: Fatal exception [ 36.523554] Dumping ftrace buffer: [ 36.527065] (ftrace buffer empty) [ 36.530744] Kernel Offset: disabled [ 36.534342] Rebooting in 86400 seconds..