[....] Starting enhanced syslogd: rsyslogd[ 14.964581] audit: type=1400 audit(1518382553.409:5): avc: denied { syslog } for pid=3928 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: [ 18.686397] audit: type=1400 audit(1518382557.131:6): avc: denied { map } for pid=4069 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 '10.128.15.225' (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 [ 25.031573] audit: type=1400 audit(1518382563.476:7): avc: denied { map } for pid=4082 comm="syzkaller497571" path="/root/syzkaller497571521" 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 [ 31.383114] kasan: CONFIG_KASAN_INLINE enabled [ 31.387788] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 31.395164] general protection fault: 0000 [#1] SMP KASAN [ 31.400672] Dumping ftrace buffer: [ 31.404185] (ftrace buffer empty) [ 31.407866] Modules linked in: [ 31.411034] CPU: 0 PID: 5083 Comm: syzkaller497571 Not tainted 4.15.0+ #308 [ 31.418101] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.427433] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 31.432512] RSP: 0018:ffff8801b83979a8 EFLAGS: 00010202 [ 31.437847] RAX: dffffc0000000000 RBX: ffff8801b8860cc0 RCX: ffffffff851b2ed0 [ 31.445090] RDX: 0000000000000045 RSI: 000000004e906c70 RDI: 0000000000000228 [ 31.452333] RBP: ffff8801b8397c28 R08: 1ffff10037072e77 R09: 0000000000000002 [ 31.459573] R10: ffff8801b8397878 R11: 0000000000000000 R12: ffff8801b800ad80 [ 31.466813] R13: ffff8801b8397c00 R14: 0000000000000000 R15: ffff8801b8397ae0 [ 31.474055] FS: 00000000012de880(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 [ 31.482247] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.488097] CR2: 000000002014cfd2 CR3: 00000001b74ce004 CR4: 00000000001606f0 [ 31.495347] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.502603] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.509846] Call Trace: [ 31.512414] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 31.517585] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 31.522929] ? selinux_socket_connect+0x311/0x730 [ 31.527742] ? lock_downgrade+0x980/0x980 [ 31.531857] ? selinux_socket_setsockopt+0x80/0x80 [ 31.536754] ? lock_release+0xa40/0xa40 [ 31.540699] ? trace_event_raw_event_sched_switch+0x810/0x810 [ 31.546554] ? __check_object_size+0x8b/0x530 [ 31.551019] ? __might_sleep+0x95/0x190 [ 31.554966] ? security_socket_connect+0x89/0xb0 [ 31.559694] SYSC_connect+0x213/0x4a0 [ 31.563480] ? SYSC_bind+0x410/0x410 [ 31.567166] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 31.571721] ? vmacache_find+0x5f/0x280 [ 31.575667] ? vmacache_update+0xfe/0x130 [ 31.579797] ? mm_fault_error+0x2c0/0x2c0 [ 31.583918] ? move_addr_to_kernel+0x60/0x60 [ 31.588299] SyS_connect+0x24/0x30 [ 31.591810] ? SyS_accept+0x30/0x30 [ 31.595413] do_syscall_64+0x282/0x940 [ 31.599269] ? __do_page_fault+0xc90/0xc90 [ 31.603473] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.608197] ? syscall_return_slowpath+0x550/0x550 [ 31.613094] ? syscall_return_slowpath+0x2ac/0x550 [ 31.617993] ? prepare_exit_to_usermode+0x350/0x350 [ 31.622980] ? retint_user+0x18/0x18 [ 31.626666] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.631565] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 31.636721] RIP: 0033:0x4410c9 [ 31.639895] RSP: 002b:00007fffccde0528 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 31.647578] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004410c9 [ 31.654823] RDX: 000000000000002e RSI: 000000002014cfd2 RDI: 0000000000000004 [ 31.662063] RBP: 0000000000007a8d R08: 0000000000000000 R09: 0000000000000000 [ 31.669305] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 31.676545] R13: 00000000004025c0 R14: 0000000000000000 R15: 0000000000000000 [ 31.683795] 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 [ 31.702860] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801b83979a8 [ 31.709463] ---[ end trace d8cdfd3f41b1f36a ]--- [ 31.714227] Kernel panic - not syncing: Fatal exception [ 31.719882] Dumping ftrace buffer: [ 31.723388] (ftrace buffer empty) [ 31.727074] Kernel Offset: disabled [ 31.730675] Rebooting in 86400 seconds..