[....] Starting enhanced syslogd: rsyslogd[ 13.184296] audit: type=1400 audit(1517137400.442:5): avc: denied { syslog } for pid=3526 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: [ 19.941728] audit: type=1400 audit(1517137407.199:6): avc: denied { map } for pid=3665 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 '10.128.0.12' (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 [ 41.068826] audit: type=1400 audit(1517137428.326:7): avc: denied { map } for pid=3682 comm="syzkaller992245" path="/root/syzkaller992245493" 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 [ 44.442143] kasan: CONFIG_KASAN_INLINE enabled [ 44.446792] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 44.454338] general protection fault: 0000 [#1] SMP KASAN [ 44.459853] Dumping ftrace buffer: [ 44.463366] (ftrace buffer empty) [ 44.467048] Modules linked in: [ 44.470217] CPU: 0 PID: 4322 Comm: syzkaller992245 Not tainted 4.15.0-rc9+ #283 [ 44.477632] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.486976] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 44.492047] RSP: 0018:ffff8801d5767af0 EFLAGS: 00010202 [ 44.497380] RAX: dffffc0000000000 RBX: ffff8801d574d600 RCX: ffffffff85115570 [ 44.504622] RDX: 0000000000000045 RSI: 0000000005b31f5d RDI: 0000000000000228 [ 44.511880] RBP: ffff8801d5767d70 R08: 1ffff1003aaece9f R09: 0000000000000002 [ 44.519119] R10: ffff8801d57679c0 R11: 0000000000000000 R12: ffff8801bb164000 [ 44.526370] R13: ffff8801d5767d48 R14: 0000000000000000 R15: ffff8801d5767c28 [ 44.533612] FS: 0000000002515880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 44.541812] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.547665] CR2: 00000000205fafd2 CR3: 00000001d527d006 CR4: 00000000001606f0 [ 44.554907] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.562151] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.569393] Call Trace: [ 44.571961] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 44.577127] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 44.582464] ? selinux_socket_connect+0x311/0x730 [ 44.587277] ? lock_downgrade+0x980/0x980 [ 44.591395] ? lock_downgrade+0x980/0x980 [ 44.595515] ? selinux_socket_setsockopt+0x80/0x80 [ 44.600413] ? lock_release+0xa40/0xa40 [ 44.604361] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 44.610227] ? __check_object_size+0x25d/0x4f0 [ 44.614784] ? handle_mm_fault+0x410/0x8d0 [ 44.618992] ? __might_sleep+0x95/0x190 [ 44.622941] ? security_socket_connect+0x89/0xb0 [ 44.627674] SYSC_connect+0x213/0x4a0 [ 44.631460] ? SYSC_bind+0x410/0x410 [ 44.635153] ? do_page_fault+0xee/0x720 [ 44.639113] ? __do_page_fault+0xc90/0xc90 [ 44.643325] ? sock_map_fd+0x53/0x90 [ 44.647010] ? SyS_socket+0x12d/0x1d0 [ 44.650784] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 44.655599] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 44.660593] SyS_connect+0x24/0x30 [ 44.664196] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 44.668924] RIP: 0033:0x440c89 [ 44.672088] RSP: 002b:00007ffc6f3171b8 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 44.679769] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000440c89 [ 44.687012] RDX: 000000000000002e RSI: 00000000205fafd2 RDI: 0000000000000004 [ 44.694254] RBP: 000000000000ad93 R08: 0000000000000000 R09: 0000000000000000 [ 44.701496] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 44.708740] R13: 0000000000000003 R14: 00000000006cf050 R15: 00000000004a262e [ 44.715993] Code: fe ff ff e8 00 d6 5e 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 e5 09 00 00 4c 89 fa 48 b8 00 00 00 00 00 fc [ 44.735677] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801d5767af0 [ 44.742317] ---[ end trace 818b390b27fe5299 ]--- [ 44.747068] Kernel panic - not syncing: Fatal exception [ 44.752888] Dumping ftrace buffer: [ 44.756403] (ftrace buffer empty) [ 44.760085] Kernel Offset: disabled [ 44.763687] Rebooting in 86400 seconds..