[....] Starting enhanced syslogd: rsyslogd[ 15.253968] audit: type=1400 audit(1518346954.927:5): avc: denied { syslog } for pid=3973 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: [ 18.274297] audit: type=1400 audit(1518346957.948:6): avc: denied { map } for pid=4112 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 '10.128.0.2' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 26.713403] audit: type=1400 audit(1518346966.387:7): avc: denied { map } for pid=4127 comm="syzkaller576820" path="/root/syzkaller576820772" 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 [ 29.822124] kasan: CONFIG_KASAN_INLINE enabled [ 29.826897] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 29.834317] general protection fault: 0000 [#1] SMP KASAN [ 29.839842] Dumping ftrace buffer: [ 29.843364] (ftrace buffer empty) [ 29.847054] Modules linked in: [ 29.850237] CPU: 1 PID: 5034 Comm: syzkaller576820 Not tainted 4.15.0+ #308 [ 29.857315] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.866659] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 executing program executing program executing program executing program executing program [ 29.871739] RSP: 0018:ffff8801c6cf79a8 EFLAGS: 00010202 [ 29.877092] RAX: dffffc0000000000 RBX: ffff8801b2df7540 RCX: ffffffff851b2ed0 [ 29.884345] RDX: 0000000000000045 RSI: 00000000a600c4f1 RDI: 0000000000000228 [ 29.891595] RBP: ffff8801c6cf7c28 R08: 1ffff10038d9ee77 R09: 0000000000000002 [ 29.898845] R10: ffff8801c6cf7878 R11: 0000000000000000 R12: ffff8801b2e5d6c0 [ 29.906097] R13: ffff8801c6cf7c00 R14: 0000000000000000 R15: ffff8801c6cf7ae0 [ 29.913360] FS: 0000000001bd8880(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 [ 29.921577] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.927436] CR2: 00007ffebf9588c4 CR3: 00000001b3444002 CR4: 00000000001606e0 [ 29.934683] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.941947] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.949188] Call Trace: [ 29.951776] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 29.956965] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 29.962301] ? selinux_socket_connect+0x311/0x730 [ 29.967122] ? lock_downgrade+0x980/0x980 [ 29.971244] ? selinux_socket_setsockopt+0x80/0x80 [ 29.976150] ? lock_release+0xa40/0xa40 [ 29.980100] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 29.985961] ? __check_object_size+0x8b/0x530 [ 29.990440] ? __might_sleep+0x95/0x190 [ 29.994395] ? security_socket_connect+0x89/0xb0 [ 29.999148] SYSC_connect+0x213/0x4a0 [ 30.002932] ? SYSC_bind+0x410/0x410 [ 30.006626] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 30.011185] ? vmacache_find+0x5f/0x280 [ 30.015145] ? mm_fault_error+0x2c0/0x2c0 [ 30.019270] ? move_addr_to_kernel+0x60/0x60 [ 30.023655] SyS_connect+0x24/0x30 [ 30.027169] ? SyS_accept+0x30/0x30 [ 30.030778] do_syscall_64+0x282/0x940 [ 30.034642] ? __do_page_fault+0xc90/0xc90 [ 30.038851] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.043583] ? syscall_return_slowpath+0x550/0x550 [ 30.048492] ? syscall_return_slowpath+0x2ac/0x550 [ 30.053408] ? prepare_exit_to_usermode+0x350/0x350 [ 30.058424] ? retint_user+0x18/0x18 [ 30.062132] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.066959] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 30.072123] RIP: 0033:0x4412a9 [ 30.075281] RSP: 002b:00007ffebf9588a8 EFLAGS: 00000206 ORIG_RAX: 000000000000002a [ 30.082967] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004412a9 [ 30.090215] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 30.097462] RBP: 0000000000007442 R08: 0000000000000000 R09: 0000000000000000 [ 30.104713] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 [ 30.111956] R13: 00000000004026f0 R14: 0000000000000000 R15: 0000000000000000 [ 30.119212] Code: fe ff ff e8 80 ce 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 [ 30.138308] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801c6cf79a8 [ 30.144894] ---[ end trace d905cf09f61ee0a1 ]--- [ 30.149649] Kernel panic - not syncing: Fatal exception [ 30.155480] Dumping ftrace buffer: [ 30.158996] (ftrace buffer empty) [ 30.162675] Kernel Offset: disabled [ 30.166273] Rebooting in 86400 seconds..