[....] Starting enhanced syslogd: rsyslogd[ 18.114654] audit: type=1400 audit(1517914855.459:5): avc: denied { syslog } for pid=4053 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: [ 22.284741] audit: type=1400 audit(1517914859.629:6): avc: denied { map } for pid=4194 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 '10.128.0.44' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 46.124502] audit: type=1400 audit(1517914883.469:7): avc: denied { map } for pid=4210 comm="syzkaller055613" path="/root/syzkaller055613081" 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 [ 46.132180] IPVS: ftp: loaded support on port[0] = 21 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 46.378104] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 50.148131] kasan: CONFIG_KASAN_INLINE enabled [ 50.152834] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.160213] general protection fault: 0000 [#1] SMP KASAN [ 50.165734] Dumping ftrace buffer: [ 50.169243] (ftrace buffer empty) [ 50.172924] Modules linked in: [ 50.176092] CPU: 1 PID: 4899 Comm: syzkaller055613 Not tainted 4.15.0+ #210 [ 50.183159] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.192491] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 50.197561] RSP: 0018:ffff8801d800f958 EFLAGS: 00010202 [ 50.202895] RAX: dffffc0000000000 RBX: ffff8801d7d7d240 RCX: ffffffff851ac980 [ 50.210133] RDX: 0000000000000045 RSI: 0000000026e401c4 RDI: 0000000000000228 [ 50.217373] RBP: ffff8801d800fbd8 R08: 1ffff1003b001e6d R09: 0000000000000002 [ 50.224613] R10: ffff8801d800f828 R11: 0000000000000000 R12: ffff8801d7d55b40 [ 50.231853] R13: ffff8801d800fbb0 R14: 0000000000000000 R15: ffff8801d800fa90 [ 50.239093] FS: 0000000000000000(0000) GS:ffff8801db500000(0063) knlGS:0000000009cbf840 [ 50.247289] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 50.253138] CR2: 0000000020e77000 CR3: 00000001c1b6c005 CR4: 00000000001606e0 [ 50.260381] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.267621] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.274859] Call Trace: [ 50.277425] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 50.282586] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 50.288008] ? selinux_socket_connect+0x311/0x730 [ 50.292821] ? lock_downgrade+0x980/0x980 [ 50.296939] ? selinux_socket_setsockopt+0x80/0x80 [ 50.301837] ? lock_release+0xa40/0xa40 [ 50.305789] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 50.311647] ? __check_object_size+0x8b/0x530 [ 50.316116] ? __might_sleep+0x95/0x190 [ 50.320069] ? security_socket_connect+0x89/0xb0 [ 50.324800] SYSC_connect+0x213/0x4a0 [ 50.328572] ? SYSC_bind+0x410/0x410 [ 50.332259] ? handle_mm_fault+0x476/0x930 [ 50.336986] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 50.341536] ? vmacache_find+0x5f/0x280 [ 50.345490] ? up_read+0x1a/0x40 [ 50.348829] ? __do_page_fault+0x3d6/0xc90 [ 50.353040] SyS_connect+0x24/0x30 [ 50.356548] ? SyS_accept+0x30/0x30 [ 50.360145] do_fast_syscall_32+0x3ee/0xfa1 [ 50.364437] ? do_int80_syscall_32+0x9d0/0x9d0 [ 50.368997] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 50.373726] ? syscall_return_slowpath+0x2ac/0x550 [ 50.378625] ? prepare_exit_to_usermode+0x350/0x350 [ 50.383611] ? retint_user+0x18/0x18 [ 50.387298] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.392114] entry_SYSENTER_compat+0x54/0x63 [ 50.396492] RIP: 0023:0xf7f1ec79 [ 50.399824] RSP: 002b:00000000ffd2c0dc EFLAGS: 00000282 ORIG_RAX: 000000000000016a [ 50.407499] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000020e77000 [ 50.414739] RDX: 000000000000002e RSI: 0000000000000000 RDI: 0000000000000000 [ 50.421976] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 50.429214] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 50.436454] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 50.443701] Code: fe ff ff e8 30 dd 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 [ 50.462775] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d800f958 [ 50.469499] ---[ end trace 8fffd9531e04df3b ]--- [ 50.474249] Kernel panic - not syncing: Fatal exception [ 50.479965] Dumping ftrace buffer: [ 50.483480] (ftrace buffer empty) [ 50.487162] Kernel Offset: disabled [ 50.490762] Rebooting in 86400 seconds..