[....] Starting enhanced syslogd: rsyslogd[ 15.423321] audit: type=1400 audit(1518319862.129:5): avc: denied { syslog } for pid=3932 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: [ 17.771907] audit: type=1400 audit(1518319864.477:6): avc: denied { map } for pid=4072 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 '10.128.0.34' (ECDSA) to the list of known hosts. [ 24.056610] audit: type=1400 audit(1518319870.762:7): avc: denied { map } for pid=4086 comm="syzkaller716101" path="/root/syzkaller716101805" 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 [ 24.067361] IPVS: ftp: loaded support on port[0] = 21 executing program [ 24.082545] audit: type=1400 audit(1518319870.762:8): avc: denied { sys_admin } for pid=4086 comm="syzkaller716101" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 24.120414] audit: type=1400 audit(1518319870.826:9): avc: denied { sys_chroot } for pid=4087 comm="syzkaller716101" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 executing program executing program executing program executing program executing program executing program [ 24.144939] audit: type=1400 audit(1518319870.827:10): avc: denied { net_admin } for pid=4087 comm="syzkaller716101" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns 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 [ 28.947892] kasan: CONFIG_KASAN_INLINE enabled [ 28.952603] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 28.959978] general protection fault: 0000 [#1] SMP KASAN [ 28.965493] Dumping ftrace buffer: [ 28.969001] (ftrace buffer empty) [ 28.972679] Modules linked in: [ 28.975843] CPU: 0 PID: 4823 Comm: syzkaller716101 Not tainted 4.15.0+ #218 [ 28.982909] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.992241] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 28.997310] RSP: 0018:ffff8801b8d67958 EFLAGS: 00010202 [ 29.002641] RAX: dffffc0000000000 RBX: ffff8801b85362c0 RCX: ffffffff851b2ed0 [ 29.009879] RDX: 0000000000000045 RSI: 000000004e906c70 RDI: 0000000000000228 [ 29.017121] RBP: ffff8801b8d67bd8 R08: 1ffff100371ace6d R09: 0000000000000002 [ 29.024358] R10: ffff8801b8d67828 R11: 0000000000000000 R12: ffff8801b742c4c0 [ 29.031595] R13: ffff8801b8d67bb0 R14: 0000000000000000 R15: ffff8801b8d67a90 [ 29.038833] FS: 0000000000000000(0000) GS:ffff8801db400000(0063) knlGS:0000000008fb9900 [ 29.047023] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 29.052871] CR2: 000000002014cfd2 CR3: 00000001b707e005 CR4: 00000000001606f0 [ 29.060110] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.067349] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.074585] Call Trace: [ 29.077146] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 29.082306] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 29.087637] ? selinux_socket_connect+0x311/0x730 [ 29.092451] ? lock_downgrade+0x980/0x980 [ 29.096570] ? selinux_socket_setsockopt+0x80/0x80 [ 29.101474] ? lock_release+0xa40/0xa40 [ 29.105416] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 29.111269] ? __check_object_size+0x8b/0x530 [ 29.115736] ? __might_sleep+0x95/0x190 [ 29.119683] ? security_socket_connect+0x89/0xb0 [ 29.124409] SYSC_connect+0x213/0x4a0 [ 29.128178] ? SYSC_bind+0x410/0x410 [ 29.131864] ? handle_mm_fault+0x43b/0x970 [ 29.136068] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 29.140616] ? vmacache_find+0x5f/0x280 [ 29.144563] ? up_read+0x1a/0x40 [ 29.147897] ? __do_page_fault+0x3d6/0xc90 [ 29.152105] SyS_connect+0x24/0x30 [ 29.155611] ? SyS_accept+0x30/0x30 [ 29.159205] do_fast_syscall_32+0x3ee/0xfa1 [ 29.163495] ? do_int80_syscall_32+0x9d0/0x9d0 [ 29.168044] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.172771] ? syscall_return_slowpath+0x2ac/0x550 [ 29.177668] ? prepare_exit_to_usermode+0x350/0x350 [ 29.182652] ? retint_user+0x18/0x18 [ 29.186338] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.191153] entry_SYSENTER_compat+0x54/0x63 [ 29.195534] RIP: 0023:0xf7fe2c79 [ 29.198870] RSP: 002b:000000000820f6fc EFLAGS: 00000246 ORIG_RAX: 000000000000016a [ 29.206547] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000002014cfd2 [ 29.213785] RDX: 000000000000002e RSI: 000000000820fe8c RDI: 000000000820fe8c [ 29.221026] RBP: 00000000000002dd R08: 0000000000000000 R09: 0000000000000000 [ 29.228277] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.235515] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 29.242764] 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 [ 29.261829] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b8d67958 [ 29.268567] ---[ end trace 51261805b8eeeb50 ]--- [ 29.273311] Kernel panic - not syncing: Fatal exception [ 29.279000] Dumping ftrace buffer: [ 29.282511] (ftrace buffer empty) [ 29.286190] Kernel Offset: disabled [ 29.289795] Rebooting in 86400 seconds..