[....] Starting enhanced syslogd: rsyslogd[ 12.894366] audit: type=1400 audit(1516374208.680:5): avc: denied { syslog } for pid=3502 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: [ 18.391326] audit: type=1400 audit(1516374214.177:6): avc: denied { map } for pid=3640 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 '10.128.15.212' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 25.434887] audit: type=1400 audit(1516374221.220:7): avc: denied { map } for pid=3654 comm="syzkaller180233" path="/root/syzkaller180233420" 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 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.820201] kasan: CONFIG_KASAN_INLINE enabled [ 30.824855] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.832236] general protection fault: 0000 [#1] SMP KASAN [ 30.837758] Dumping ftrace buffer: [ 30.841268] (ftrace buffer empty) [ 30.844948] Modules linked in: [ 30.848114] CPU: 1 PID: 7298 Comm: syzkaller180233 Not tainted 4.15.0-rc8+ #268 [ 30.855529] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.864871] RIP: 0010:pppol2tp_connect+0x10a3/0x1dd0 [ 30.869953] RSP: 0018:ffff8801c727faf0 EFLAGS: 00010202 [ 30.875288] RAX: dffffc0000000000 RBX: ffff8801c7110400 RCX: ffffffff850258e0 [ 30.882529] RDX: 0000000000000045 RSI: 00000000364f900d RDI: 0000000000000228 [ 30.889770] RBP: ffff8801c727fd70 R08: 1ffff10038e4fe9f R09: 0000000000000002 [ 30.897028] R10: ffff8801c727f9c0 R11: 0000000000000000 R12: ffff8801c7106d80 [ 30.904273] R13: ffff8801c727fd48 R14: 0000000000000000 R15: ffff8801c727fc28 [ 30.911515] FS: 00000000017ce880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 30.919711] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.925566] CR2: 0000000020e71000 CR3: 00000001c7763004 CR4: 00000000001606e0 [ 30.932820] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.940064] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.947304] Call Trace: [ 30.949879] ? pppol2tp_recv_payload_hook+0x1b0/0x1b0 [ 30.955045] ? selinux_netlbl_socket_connect+0x76/0x1b0 [ 30.960383] ? selinux_socket_connect+0x311/0x730 [ 30.965203] ? lock_downgrade+0x980/0x980 [ 30.969321] ? lock_downgrade+0x980/0x980 [ 30.973440] ? selinux_socket_setsockopt+0x80/0x80 [ 30.978337] ? lock_release+0xa40/0xa40 [ 30.982283] ? trace_event_raw_event_sched_switch+0x800/0x800 [ 30.988146] ? __check_object_size+0x25d/0x4f0 [ 30.992700] ? handle_mm_fault+0x410/0x8d0 [ 30.996909] ? __might_sleep+0x95/0x190 [ 31.000860] ? security_socket_connect+0x89/0xb0 [ 31.005589] SYSC_connect+0x213/0x4a0 [ 31.009361] ? SYSC_bind+0x410/0x410 [ 31.013054] ? do_page_fault+0xee/0x720 [ 31.017000] ? __do_page_fault+0xc90/0xc90 [ 31.021214] ? sock_map_fd+0x53/0x90 [ 31.024896] ? SyS_socket+0x12d/0x1d0 [ 31.028670] ? entry_SYSCALL_64_fastpath+0x5/0xa0 [ 31.033482] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.038470] SyS_connect+0x24/0x30 [ 31.041982] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 31.046717] RIP: 0033:0x440809 [ 31.049878] RSP: 002b:00007fff4dbafd78 EFLAGS: 00000207 ORIG_RAX: 000000000000002a [ 31.057565] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440809 [ 31.064806] RDX: 0000000000000032 RSI: 0000000020e71000 RDI: 0000000000000004 [ 31.072052] RBP: 0000000000007862 R08: 0000000000000000 R09: 0000000000000000 [ 31.079291] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000 [ 31.086531] R13: 0000000000401d00 R14: 0000000000000000 R15: 0000000000000000 [ 31.093786] Code: fe ff ff e8 b0 d1 6d 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 [ 31.112854] RIP: pppol2tp_connect+0x10a3/0x1dd0 RSP: ffff8801c727faf0 [ 31.119465] ---[ end trace ed4e3a05d5a9dede ]--- [ 31.124213] Kernel panic - not syncing: Fatal exception [ 31.129976] Dumping ftrace buffer: [ 31.133493] (ftrace buffer empty) [ 31.137173] Kernel Offset: disabled [ 31.140769] Rebooting in 86400 seconds..