[....] Starting enhanced syslogd: rsyslogd[ 15.465230] audit: type=1400 audit(1520822634.909:5): avc: denied { syslog } for pid=3931 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: [ 17.770194] audit: type=1400 audit(1520822637.214:6): avc: denied { map } for pid=4070 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 '10.128.0.19' (ECDSA) to the list of known hosts. [ 24.013593] audit: type=1400 audit(1520822643.457:7): avc: denied { map } for pid=4084 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/03/12 02:44:03 parsed 1 programs 2018/03/12 02:44:03 executed programs: 0 [ 24.263572] audit: type=1400 audit(1520822643.706:8): avc: denied { map } for pid=4084 comm="syz-execprog" path="/root/syzkaller-shm903037194" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 24.275177] IPVS: ftp: loaded support on port[0] = 21 [ 24.539732] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 24.885811] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 24.891904] 8021q: adding VLAN 0 to HW filter on device bond0 [ 24.928822] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 24.965558] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 24.997583] ================================================================== [ 25.005002] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 25.011470] Read of size 8 at addr ffff8801c54ba218 by task syz-executor0/4250 [ 25.018796] [ 25.020398] CPU: 1 PID: 4250 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #260 [ 25.027647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.036979] Call Trace: [ 25.039544] dump_stack+0x194/0x24d [ 25.043148] ? arch_local_irq_restore+0x53/0x53 [ 25.047787] ? show_regs_print_info+0x18/0x18 [ 25.052259] ? ip6_xmit+0x1f76/0x2260 [ 25.056039] print_address_description+0x73/0x250 [ 25.060860] ? ip6_xmit+0x1f76/0x2260 [ 25.064642] kasan_report+0x23c/0x360 [ 25.068419] __asan_report_load8_noabort+0x14/0x20 [ 25.073339] ip6_xmit+0x1f76/0x2260 [ 25.076971] ? ip6_finish_output2+0x23a0/0x23a0 [ 25.081615] ? fl6_update_dst+0x127/0x2b0 [ 25.085741] ? inet6_csk_route_socket+0x691/0xe80 [ 25.090562] ? trace_hardirqs_off+0x10/0x10 [ 25.094854] ? lock_acquire+0x1d5/0x580 [ 25.098804] ? lock_acquire+0x1d5/0x580 [ 25.102750] ? inet6_csk_xmit+0x114/0x580 [ 25.106871] ? trace_hardirqs_off+0x10/0x10 [ 25.111165] ? lock_release+0xa40/0xa40 [ 25.115126] inet6_csk_xmit+0x2fc/0x580 [ 25.119076] ? inet6_csk_update_pmtu+0x160/0x160 [ 25.123803] ? __sk_dst_check+0x1a5/0x380 [ 25.127924] ? sock_kfree_s+0x60/0x60 [ 25.131712] l2tp_xmit_skb+0x105f/0x1410 [ 25.135754] ? l2tp_session_create+0xb80/0xb80 [ 25.140309] ? sock_wmalloc+0x15d/0x1d0 [ 25.144257] ? iov_iter_advance+0x13f0/0x13f0 [ 25.148732] ? pppol2tp_sendmsg+0x41b/0x670 [ 25.153036] pppol2tp_sendmsg+0x470/0x670 [ 25.157160] ? selinux_socket_sendmsg+0x36/0x40 [ 25.161800] ? pppol2tp_getsockopt+0x900/0x900 [ 25.166355] sock_sendmsg+0xca/0x110 [ 25.170043] SYSC_sendto+0x361/0x5c0 [ 25.173733] ? SYSC_connect+0x4a0/0x4a0 [ 25.177681] ? find_held_lock+0x35/0x1d0 [ 25.181726] ? lock_downgrade+0x980/0x980 [ 25.185870] ? __do_page_fault+0x3d6/0xc90 [ 25.190083] SyS_sendto+0x40/0x50 [ 25.193508] ? SyS_getpeername+0x30/0x30 [ 25.197541] do_fast_syscall_32+0x3ec/0xf9f [ 25.201840] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.206393] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.211125] ? syscall_return_slowpath+0x2ac/0x550 [ 25.216032] ? prepare_exit_to_usermode+0x350/0x350 [ 25.221032] ? sysret32_from_system_call+0x5/0x3c [ 25.225854] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.230672] entry_SYSENTER_compat+0x70/0x7f [ 25.235051] RIP: 0023:0xf7f35c99 [ 25.238383] RSP: 002b:00000000ff8da5ec EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 25.246061] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 25.253300] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 25.260539] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 25.267787] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.275032] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.282290] [ 25.283888] Allocated by task 0: [ 25.287219] (stack is not available) [ 25.290906] [ 25.292502] Freed by task 0: [ 25.295485] (stack is not available) [ 25.299167] [ 25.300774] The buggy address belongs to the object at ffff8801c54ba200 [ 25.300774] which belongs to the cache ip_dst_cache of size 168 [ 25.313485] The buggy address is located 24 bytes inside of [ 25.313485] 168-byte region [ffff8801c54ba200, ffff8801c54ba2a8) [ 25.325241] The buggy address belongs to the page: [ 25.330138] page:ffffea0007152e80 count:1 mapcount:0 mapping:ffff8801c54ba000 index:0x0 [ 25.338251] flags: 0x2fffc0000000100(slab) [ 25.342457] raw: 02fffc0000000100 ffff8801c54ba000 0000000000000000 0000000100000010 [ 25.350306] raw: ffffea0006ee90a0 ffff8801d5bdf748 ffff8801d5bea4c0 0000000000000000 [ 25.358155] page dumped because: kasan: bad access detected [ 25.363841] [ 25.365439] Memory state around the buggy address: [ 25.370336] ffff8801c54ba100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.377665] ffff8801c54ba180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 25.384994] >ffff8801c54ba200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.392325] ^ [ 25.396445] ffff8801c54ba280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.403774] ffff8801c54ba300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.411101] ================================================================== [ 25.418430] Disabling lock debugging due to kernel taint [ 25.423878] Kernel panic - not syncing: panic_on_warn set ... [ 25.423878] [ 25.431222] CPU: 1 PID: 4250 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #260 [ 25.439771] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.449096] Call Trace: [ 25.451655] dump_stack+0x194/0x24d [ 25.455259] ? arch_local_irq_restore+0x53/0x53 [ 25.459899] ? kasan_end_report+0x32/0x50 [ 25.464023] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.468749] ? vsnprintf+0x1ed/0x1900 [ 25.472521] ? ip6_xmit+0x1f30/0x2260 [ 25.476304] panic+0x1e4/0x41c [ 25.479467] ? refcount_error_report+0x214/0x214 [ 25.484195] ? add_taint+0x1c/0x50 [ 25.487706] ? add_taint+0x1c/0x50 [ 25.491234] ? ip6_xmit+0x1f76/0x2260 [ 25.495010] kasan_end_report+0x50/0x50 [ 25.498962] kasan_report+0x149/0x360 [ 25.502736] __asan_report_load8_noabort+0x14/0x20 [ 25.507634] ip6_xmit+0x1f76/0x2260 [ 25.511238] ? ip6_finish_output2+0x23a0/0x23a0 [ 25.515878] ? fl6_update_dst+0x127/0x2b0 [ 25.519993] ? inet6_csk_route_socket+0x691/0xe80 [ 25.524806] ? trace_hardirqs_off+0x10/0x10 [ 25.529102] ? lock_acquire+0x1d5/0x580 [ 25.533043] ? lock_acquire+0x1d5/0x580 [ 25.536983] ? inet6_csk_xmit+0x114/0x580 [ 25.541100] ? trace_hardirqs_off+0x10/0x10 [ 25.545391] ? lock_release+0xa40/0xa40 [ 25.549340] inet6_csk_xmit+0x2fc/0x580 [ 25.553281] ? inet6_csk_update_pmtu+0x160/0x160 [ 25.558006] ? __sk_dst_check+0x1a5/0x380 [ 25.562128] ? sock_kfree_s+0x60/0x60 [ 25.565906] l2tp_xmit_skb+0x105f/0x1410 [ 25.569940] ? l2tp_session_create+0xb80/0xb80 [ 25.574489] ? sock_wmalloc+0x15d/0x1d0 [ 25.578434] ? iov_iter_advance+0x13f0/0x13f0 [ 25.582897] ? pppol2tp_sendmsg+0x41b/0x670 [ 25.587189] pppol2tp_sendmsg+0x470/0x670 [ 25.591306] ? selinux_socket_sendmsg+0x36/0x40 [ 25.595943] ? pppol2tp_getsockopt+0x900/0x900 [ 25.600493] sock_sendmsg+0xca/0x110 [ 25.604177] SYSC_sendto+0x361/0x5c0 [ 25.607862] ? SYSC_connect+0x4a0/0x4a0 [ 25.611807] ? find_held_lock+0x35/0x1d0 [ 25.615839] ? lock_downgrade+0x980/0x980 [ 25.619967] ? __do_page_fault+0x3d6/0xc90 [ 25.624173] SyS_sendto+0x40/0x50 [ 25.627595] ? SyS_getpeername+0x30/0x30 [ 25.631626] do_fast_syscall_32+0x3ec/0xf9f [ 25.635917] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.640465] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.645189] ? syscall_return_slowpath+0x2ac/0x550 [ 25.650090] ? prepare_exit_to_usermode+0x350/0x350 [ 25.655076] ? sysret32_from_system_call+0x5/0x3c [ 25.659888] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.664699] entry_SYSENTER_compat+0x70/0x7f [ 25.669074] RIP: 0023:0xf7f35c99 [ 25.672404] RSP: 002b:00000000ff8da5ec EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 25.680080] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 25.687318] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 25.694565] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 25.701801] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.709037] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.716706] Dumping ftrace buffer: [ 25.720216] (ftrace buffer empty) [ 25.724354] Kernel Offset: disabled [ 25.727950] Rebooting in 86400 seconds..