[....] Starting enhanced syslogd: rsyslogd[ 15.621443] audit: type=1400 audit(1520643501.520:5): avc: denied { syslog } for pid=4074 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: [ 19.705172] audit: type=1400 audit(1520643505.603:6): avc: denied { map } for pid=4214 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 '10.128.0.17' (ECDSA) to the list of known hosts. [ 25.981679] audit: type=1400 audit(1520643511.880:7): avc: denied { map } for pid=4228 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 2018/03/10 00:58:32 parsed 1 programs 2018/03/10 00:58:32 executed programs: 0 [ 26.237116] audit: type=1400 audit(1520643512.135:8): avc: denied { map } for pid=4228 comm="syz-execprog" path="/root/syzkaller-shm234683388" 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 [ 26.250056] IPVS: ftp: loaded support on port[0] = 21 [ 26.513947] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 26.873348] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 26.879450] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.920304] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 26.961439] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 26.977758] ================================================================== [ 26.985176] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 26.991643] Read of size 8 at addr ffff8801d068f118 by task syz-executor0/4393 [ 26.998971] [ 27.000576] CPU: 0 PID: 4393 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #257 [ 27.007819] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.017148] Call Trace: [ 27.019711] dump_stack+0x194/0x24d [ 27.023314] ? arch_local_irq_restore+0x53/0x53 [ 27.027965] ? show_regs_print_info+0x18/0x18 [ 27.032438] ? ip6_xmit+0x1f76/0x2260 [ 27.036213] print_address_description+0x73/0x250 [ 27.041033] ? ip6_xmit+0x1f76/0x2260 [ 27.044806] kasan_report+0x23c/0x360 [ 27.048589] __asan_report_load8_noabort+0x14/0x20 [ 27.053489] ip6_xmit+0x1f76/0x2260 [ 27.057099] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.061742] ? fl6_update_dst+0x127/0x2b0 [ 27.065871] ? inet6_csk_route_socket+0x691/0xe80 [ 27.070695] ? trace_hardirqs_off+0x10/0x10 [ 27.074996] ? lock_acquire+0x1d5/0x580 [ 27.078943] ? lock_acquire+0x1d5/0x580 [ 27.082887] ? inet6_csk_xmit+0x114/0x580 [ 27.087007] ? trace_hardirqs_off+0x10/0x10 [ 27.091315] ? lock_release+0xa40/0xa40 [ 27.095276] inet6_csk_xmit+0x2fc/0x580 [ 27.099224] ? inet6_csk_update_pmtu+0x160/0x160 [ 27.103954] ? __sk_dst_check+0x1a5/0x380 [ 27.108075] ? sock_kfree_s+0x60/0x60 [ 27.111885] l2tp_xmit_skb+0x105f/0x1410 [ 27.115934] ? l2tp_session_create+0xb80/0xb80 [ 27.120490] ? sock_wmalloc+0x15d/0x1d0 [ 27.124438] ? iov_iter_advance+0x13f0/0x13f0 [ 27.128910] ? pppol2tp_sendmsg+0x41b/0x670 [ 27.133207] pppol2tp_sendmsg+0x470/0x670 [ 27.137327] ? selinux_socket_sendmsg+0x36/0x40 [ 27.141969] ? pppol2tp_getsockopt+0x900/0x900 [ 27.146535] sock_sendmsg+0xca/0x110 [ 27.150229] SYSC_sendto+0x361/0x5c0 [ 27.153920] ? SYSC_connect+0x4a0/0x4a0 [ 27.157869] ? find_held_lock+0x35/0x1d0 [ 27.161912] ? lock_downgrade+0x980/0x980 [ 27.166075] ? __do_page_fault+0x3d6/0xc90 [ 27.170291] SyS_sendto+0x40/0x50 [ 27.173718] ? SyS_getpeername+0x30/0x30 [ 27.177752] do_fast_syscall_32+0x3ec/0xf9f [ 27.182051] ? do_int80_syscall_32+0x9c0/0x9c0 [ 27.186612] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.191351] ? syscall_return_slowpath+0x2ac/0x550 [ 27.196427] ? prepare_exit_to_usermode+0x350/0x350 [ 27.201417] ? sysret32_from_system_call+0x5/0x3c [ 27.206235] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.211054] entry_SYSENTER_compat+0x70/0x7f [ 27.215433] RIP: 0023:0xf7f8ac99 [ 27.218765] RSP: 002b:00000000ffc7c8ec EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 27.226442] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020de7000 [ 27.233680] RDX: 0000000000000000 RSI: 00000000a9554f8b RDI: 000000002064eff0 [ 27.240919] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 27.248159] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.255397] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.262653] [ 27.264251] Allocated by task 0: [ 27.267585] (stack is not available) [ 27.271263] [ 27.272860] Freed by task 0: [ 27.275846] (stack is not available) [ 27.279527] [ 27.281128] The buggy address belongs to the object at ffff8801d068f100 [ 27.281128] which belongs to the cache ip_dst_cache of size 168 [ 27.293843] The buggy address is located 24 bytes inside of [ 27.293843] 168-byte region [ffff8801d068f100, ffff8801d068f1a8) [ 27.305610] The buggy address belongs to the page: [ 27.310509] page:ffffea000741a3c0 count:1 mapcount:0 mapping:ffff8801d068f000 index:0x0 [ 27.318621] flags: 0x2fffc0000000100(slab) [ 27.322826] raw: 02fffc0000000100 ffff8801d068f000 0000000000000000 0000000100000010 [ 27.330685] raw: ffffea0006e61860 ffff8801d540ba48 ffff8801d540c980 0000000000000000 [ 27.338971] page dumped because: kasan: bad access detected [ 27.344649] [ 27.346244] Memory state around the buggy address: [ 27.351150] ffff8801d068f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.358479] ffff8801d068f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 27.365805] >ffff8801d068f100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.373131] ^ [ 27.377251] ffff8801d068f180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.384589] ffff8801d068f200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 27.391914] ================================================================== [ 27.399239] Disabling lock debugging due to kernel taint [ 27.404686] Kernel panic - not syncing: panic_on_warn set ... [ 27.404686] [ 27.412034] CPU: 0 PID: 4393 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #257 [ 27.420578] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.429903] Call Trace: [ 27.432464] dump_stack+0x194/0x24d [ 27.436064] ? arch_local_irq_restore+0x53/0x53 [ 27.440702] ? kasan_end_report+0x32/0x50 [ 27.444824] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.449550] ? vsnprintf+0x1ed/0x1900 [ 27.453327] ? ip6_xmit+0x1f30/0x2260 [ 27.457100] panic+0x1e4/0x41c [ 27.460267] ? refcount_error_report+0x214/0x214 [ 27.464992] ? add_taint+0x1c/0x50 [ 27.468503] ? add_taint+0x1c/0x50 [ 27.472018] ? ip6_xmit+0x1f76/0x2260 [ 27.475789] kasan_end_report+0x50/0x50 [ 27.479732] kasan_report+0x149/0x360 [ 27.483502] __asan_report_load8_noabort+0x14/0x20 [ 27.488400] ip6_xmit+0x1f76/0x2260 [ 27.492003] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.496650] ? fl6_update_dst+0x127/0x2b0 [ 27.500768] ? inet6_csk_route_socket+0x691/0xe80 [ 27.505584] ? trace_hardirqs_off+0x10/0x10 [ 27.509876] ? lock_acquire+0x1d5/0x580 [ 27.513817] ? lock_acquire+0x1d5/0x580 [ 27.517759] ? inet6_csk_xmit+0x114/0x580 [ 27.521874] ? trace_hardirqs_off+0x10/0x10 [ 27.526166] ? lock_release+0xa40/0xa40 [ 27.530124] inet6_csk_xmit+0x2fc/0x580 [ 27.534067] ? inet6_csk_update_pmtu+0x160/0x160 [ 27.538811] ? __sk_dst_check+0x1a5/0x380 [ 27.542927] ? sock_kfree_s+0x60/0x60 [ 27.546705] l2tp_xmit_skb+0x105f/0x1410 [ 27.550741] ? l2tp_session_create+0xb80/0xb80 [ 27.555289] ? sock_wmalloc+0x15d/0x1d0 [ 27.559234] ? iov_iter_advance+0x13f0/0x13f0 [ 27.563697] ? pppol2tp_sendmsg+0x41b/0x670 [ 27.567987] pppol2tp_sendmsg+0x470/0x670 [ 27.572111] ? selinux_socket_sendmsg+0x36/0x40 [ 27.576747] ? pppol2tp_getsockopt+0x900/0x900 [ 27.581297] sock_sendmsg+0xca/0x110 [ 27.584980] SYSC_sendto+0x361/0x5c0 [ 27.588662] ? SYSC_connect+0x4a0/0x4a0 [ 27.592610] ? find_held_lock+0x35/0x1d0 [ 27.596650] ? lock_downgrade+0x980/0x980 [ 27.600778] ? __do_page_fault+0x3d6/0xc90 [ 27.604986] SyS_sendto+0x40/0x50 [ 27.608410] ? SyS_getpeername+0x30/0x30 [ 27.612440] do_fast_syscall_32+0x3ec/0xf9f [ 27.616732] ? do_int80_syscall_32+0x9c0/0x9c0 [ 27.621282] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 27.626010] ? syscall_return_slowpath+0x2ac/0x550 [ 27.630914] ? prepare_exit_to_usermode+0x350/0x350 [ 27.635902] ? sysret32_from_system_call+0x5/0x3c [ 27.640715] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.645528] entry_SYSENTER_compat+0x70/0x7f [ 27.649903] RIP: 0023:0xf7f8ac99 [ 27.653237] RSP: 002b:00000000ffc7c8ec EFLAGS: 00000286 ORIG_RAX: 0000000000000171 [ 27.660912] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020de7000 [ 27.668149] RDX: 0000000000000000 RSI: 00000000a9554f8b RDI: 000000002064eff0 [ 27.675388] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 27.682625] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.689862] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.697520] Dumping ftrace buffer: [ 27.701031] (ftrace buffer empty) [ 27.704712] Kernel Offset: disabled [ 27.708309] Rebooting in 86400 seconds..