[....] Starting enhanced syslogd: rsyslogd[ 14.569267] audit: type=1400 audit(1518376758.597:5): avc: denied { syslog } for pid=3954 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 OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.304254] audit: type=1400 audit(1518376762.332:6): avc: denied { map } for pid=4094 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 '10.128.15.222' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program [ 28.676065] audit: type=1400 audit(1518376772.703:7): avc: denied { map } for pid=4110 comm="syzkaller847233" path="/root/syzkaller847233718" 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 [ 33.899139] kasan: CONFIG_KASAN_INLINE enabled [ 33.903836] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.911209] general protection fault: 0000 [#1] SMP KASAN [ 33.916726] Dumping ftrace buffer: [ 33.920235] (ftrace buffer empty) [ 33.923916] Modules linked in: [ 33.927081] CPU: 0 PID: 5488 Comm: syzkaller847233 Not tainted 4.15.0+ #308 [ 33.934146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.943475] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 33.948542] RSP: 0018:ffff8801c579f9a8 EFLAGS: 00010202 [ 33.953876] RAX: dffffc0000000000 RBX: ffff8801b602a540 RCX: ffffffff851b2ed0 [ 33.961117] RDX: 0000000000000045 RSI: 00000000a600c4f1 RDI: 0000000000000228 [ 33.968357] RBP: ffff8801c579fc28 R08: 1ffff10038af3e77 R09: 0000000000000002 [ 33.975773] R10: ffff8801c579f878 R11: 0000000000000000 R12: ffff8801b6011200 [ 33.983014] R13: ffff8801c579fc00 R14: 0000000000000000 R15: ffff8801c579fae0 [ 33.990262] FS: 00007fccb1f1f700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 33.998461] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.004319] CR2: 0000000020e71000 CR3: 00000001b6690001 CR4: 00000000001606f0 [ 34.011561] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.018804] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.026048] Call Trace: [ 34.028614] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 34.033778] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 34.039112] ? selinux_socket_connect+0x311/0x730 [ 34.043932] ? lock_downgrade+0x980/0x980 [ 34.048050] ? selinux_socket_setsockopt+0x80/0x80 [ 34.052948] ? lock_release+0xa40/0xa40 [ 34.056891] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 34.062748] ? __check_object_size+0x8b/0x530 [ 34.067217] ? __might_sleep+0x95/0x190 [ 34.071168] ? security_socket_connect+0x89/0xb0 [ 34.075899] SYSC_connect+0x213/0x4a0 [ 34.079674] ? SYSC_bind+0x410/0x410 [ 34.083359] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 34.087913] ? vmacache_find+0x5f/0x280 [ 34.091878] ? mm_fault_error+0x2c0/0x2c0 [ 34.095995] ? move_addr_to_kernel+0x60/0x60 [ 34.100378] SyS_connect+0x24/0x30 [ 34.103890] ? SyS_accept+0x30/0x30 [ 34.107487] do_syscall_64+0x282/0x940 [ 34.111344] ? __do_page_fault+0xc90/0xc90 [ 34.115545] ? mmdrop+0x18/0x30 [ 34.118793] ? finish_task_switch+0x29b/0x890 [ 34.123258] ? syscall_return_slowpath+0x550/0x550 [ 34.128155] ? syscall_return_slowpath+0x2ac/0x550 [ 34.133056] ? prepare_exit_to_usermode+0x350/0x350 [ 34.138048] ? retint_user+0x18/0x18 [ 34.141733] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.146549] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 34.151705] RIP: 0033:0x446a29 [ 34.154862] RSP: 002b:00007fccb1f1eda8 EFLAGS: 00000293 ORIG_RAX: 000000000000002a [ 34.162539] RAX: ffffffffffffffda RBX: 00000000006e1644 RCX: 0000000000446a29 [ 34.169776] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000008 [ 34.177020] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 34.184263] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006e1640 [ 34.191501] R13: 73696c6b63616c62 R14: 0030656c69662f2e R15: 0000000000000017 [ 34.198745] 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 [ 34.217807] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801c579f9a8 [ 34.224546] ---[ end trace 676db1dc5d670a4f ]--- [ 34.229299] Kernel panic - not syncing: Fatal exception [ 34.235034] Dumping ftrace buffer: [ 34.238545] (ftrace buffer empty) [ 34.242222] Kernel Offset: disabled [ 34.245815] Rebooting in 86400 seconds..