[....] Starting enhanced syslogd: rsyslogd[ 17.011839] audit: type=1400 audit(1520724259.761:5): avc: denied { syslog } for pid=4120 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: [ 22.996248] audit: type=1400 audit(1520724265.746:6): avc: denied { map } for pid=4260 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 '10.128.0.62' (ECDSA) to the list of known hosts. net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 29.312331] audit: type=1400 audit(1520724272.062:7): avc: denied { map } for pid=4274 comm="syzkaller448272" path="/root/syzkaller448272697" 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 [ 29.320435] IPVS: ftp: loaded support on port[0] = 21 RTNETLINK answers: File exists RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported [ 29.582387] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 29.922288] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 29.928392] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 29.963922] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.001563] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.010526] ================================================================== [ 30.017919] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.024382] Read of size 8 at addr ffff8801b3ca1218 by task syzkaller448272/4275 [ 30.031881] [ 30.033484] CPU: 1 PID: 4275 Comm: syzkaller448272 Not tainted 4.16.0-rc4+ #260 [ 30.040909] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.050232] Call Trace: [ 30.052793] dump_stack+0x194/0x24d [ 30.056395] ? arch_local_irq_restore+0x53/0x53 [ 30.061040] ? show_regs_print_info+0x18/0x18 [ 30.065513] ? ip6_xmit+0x1f76/0x2260 [ 30.069287] print_address_description+0x73/0x250 [ 30.074105] ? ip6_xmit+0x1f76/0x2260 [ 30.077878] kasan_report+0x23c/0x360 [ 30.081653] __asan_report_load8_noabort+0x14/0x20 [ 30.086550] ip6_xmit+0x1f76/0x2260 [ 30.090160] ? ip6_finish_output2+0x23d0/0x23d0 [ 30.094801] ? fl6_update_dst+0x127/0x2b0 [ 30.098926] ? inet6_csk_route_socket+0x691/0xe80 [ 30.103740] ? trace_hardirqs_off+0x10/0x10 [ 30.108034] ? lock_acquire+0x1d5/0x580 [ 30.111977] ? lock_acquire+0x1d5/0x580 [ 30.115922] ? inet6_csk_xmit+0x114/0x580 [ 30.120044] ? trace_hardirqs_off+0x10/0x10 [ 30.124338] ? lock_release+0xa40/0xa40 [ 30.128304] inet6_csk_xmit+0x2fc/0x580 [ 30.132251] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.136978] ? __sk_dst_check+0x1a5/0x380 [ 30.141102] ? sock_kzfree_s+0x60/0x60 [ 30.144977] l2tp_xmit_skb+0x105f/0x1410 [ 30.149031] ? l2tp_session_create+0xb80/0xb80 [ 30.153590] ? sock_wmalloc+0x15d/0x1d0 [ 30.157536] ? iov_iter_advance+0x13f0/0x13f0 [ 30.162009] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.166325] pppol2tp_sendmsg+0x470/0x670 [ 30.170446] ? selinux_socket_sendmsg+0x36/0x40 [ 30.175087] ? pppol2tp_getsockopt+0x900/0x900 [ 30.179640] sock_sendmsg+0xca/0x110 [ 30.183328] SYSC_sendto+0x361/0x5c0 [ 30.187024] ? SYSC_connect+0x4a0/0x4a0 [ 30.190983] ? inet_dgram_connect+0x172/0x1f0 [ 30.195451] ? SYSC_connect+0x2e0/0x4a0 [ 30.199426] ? mm_fault_error+0x2c0/0x2c0 [ 30.203548] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 30.209069] SyS_sendto+0x40/0x50 [ 30.212495] ? SyS_getpeername+0x30/0x30 [ 30.216529] do_syscall_64+0x281/0x940 [ 30.220387] ? __do_page_fault+0xc90/0xc90 [ 30.224593] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.229321] ? syscall_return_slowpath+0x550/0x550 [ 30.234222] ? syscall_return_slowpath+0x2ac/0x550 [ 30.239124] ? prepare_exit_to_usermode+0x350/0x350 [ 30.244114] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 30.249451] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.254272] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.259433] RIP: 0033:0x4433f9 [ 30.262594] RSP: 002b:00007fff78459728 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 30.270274] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00000000004433f9 [ 30.277518] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 30.284759] RBP: 00000000004a4def R08: 00000000200021c0 R09: 0000000000000080 [ 30.291999] R10: 0000000000040001 R11: 0000000000000212 R12: 00007fff78459830 [ 30.299243] R13: 0000000000404180 R14: 0000000000000000 R15: 0000000000000000 [ 30.306498] [ 30.308097] Allocated by task 0: [ 30.311429] (stack is not available) [ 30.315111] [ 30.316711] Freed by task 0: [ 30.319697] (stack is not available) [ 30.323377] [ 30.324975] The buggy address belongs to the object at ffff8801b3ca1200 [ 30.324975] which belongs to the cache ip_dst_cache of size 160 [ 30.337684] The buggy address is located 24 bytes inside of [ 30.337684] 160-byte region [ffff8801b3ca1200, ffff8801b3ca12a0) [ 30.349437] The buggy address belongs to the page: [ 30.354338] page:ffffea0006cf2840 count:1 mapcount:0 mapping:ffff8801b3ca1000 index:0x0 [ 30.362447] flags: 0x2fffc0000000100(slab) [ 30.366655] raw: 02fffc0000000100 ffff8801b3ca1000 0000000000000000 0000000100000010 [ 30.374505] raw: ffffea0007409420 ffff8801d5bc7f48 ffff8801d5bc6e00 0000000000000000 [ 30.382354] page dumped because: kasan: bad access detected [ 30.388032] [ 30.389628] Memory state around the buggy address: [ 30.394526] ffff8801b3ca1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.401853] ffff8801b3ca1180: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 30.409181] >ffff8801b3ca1200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.416506] ^ [ 30.420622] ffff8801b3ca1280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.427949] ffff8801b3ca1300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.435277] ================================================================== [ 30.442604] Disabling lock debugging due to kernel taint [ 30.448060] Kernel panic - not syncing: panic_on_warn set ... [ 30.448060] [ 30.455401] CPU: 1 PID: 4275 Comm: syzkaller448272 Tainted: G B 4.16.0-rc4+ #260 [ 30.464119] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.473439] Call Trace: [ 30.475997] dump_stack+0x194/0x24d [ 30.479604] ? arch_local_irq_restore+0x53/0x53 [ 30.484243] ? kasan_end_report+0x32/0x50 [ 30.488363] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.493087] ? vsnprintf+0x1ed/0x1900 [ 30.496858] ? ip6_xmit+0x1eb0/0x2260 [ 30.500627] panic+0x1e4/0x41c [ 30.503790] ? refcount_error_report+0x214/0x214 [ 30.508515] ? add_taint+0x1c/0x50 [ 30.512030] ? add_taint+0x1c/0x50 [ 30.515539] ? ip6_xmit+0x1f76/0x2260 [ 30.519310] kasan_end_report+0x50/0x50 [ 30.523251] kasan_report+0x149/0x360 [ 30.527029] __asan_report_load8_noabort+0x14/0x20 [ 30.531927] ip6_xmit+0x1f76/0x2260 [ 30.535534] ? ip6_finish_output2+0x23d0/0x23d0 [ 30.540173] ? fl6_update_dst+0x127/0x2b0 [ 30.544301] ? inet6_csk_route_socket+0x691/0xe80 [ 30.549114] ? trace_hardirqs_off+0x10/0x10 [ 30.553407] ? lock_acquire+0x1d5/0x580 [ 30.557358] ? lock_acquire+0x1d5/0x580 [ 30.561300] ? inet6_csk_xmit+0x114/0x580 [ 30.565416] ? trace_hardirqs_off+0x10/0x10 [ 30.569708] ? lock_release+0xa40/0xa40 [ 30.573658] inet6_csk_xmit+0x2fc/0x580 [ 30.577600] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.582325] ? __sk_dst_check+0x1a5/0x380 [ 30.586443] ? sock_kzfree_s+0x60/0x60 [ 30.590310] l2tp_xmit_skb+0x105f/0x1410 [ 30.594348] ? l2tp_session_create+0xb80/0xb80 [ 30.598900] ? sock_wmalloc+0x15d/0x1d0 [ 30.602844] ? iov_iter_advance+0x13f0/0x13f0 [ 30.607312] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.611606] pppol2tp_sendmsg+0x470/0x670 [ 30.615726] ? selinux_socket_sendmsg+0x36/0x40 [ 30.620364] ? pppol2tp_getsockopt+0x900/0x900 [ 30.624914] sock_sendmsg+0xca/0x110 [ 30.628601] SYSC_sendto+0x361/0x5c0 [ 30.632288] ? SYSC_connect+0x4a0/0x4a0 [ 30.636248] ? inet_dgram_connect+0x172/0x1f0 [ 30.640718] ? SYSC_connect+0x2e0/0x4a0 [ 30.644685] ? mm_fault_error+0x2c0/0x2c0 [ 30.648807] ? trace_event_raw_event_sys_exit+0x260/0x260 [ 30.654315] SyS_sendto+0x40/0x50 [ 30.657737] ? SyS_getpeername+0x30/0x30 [ 30.661769] do_syscall_64+0x281/0x940 [ 30.665626] ? __do_page_fault+0xc90/0xc90 [ 30.669828] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.674553] ? syscall_return_slowpath+0x550/0x550 [ 30.679450] ? syscall_return_slowpath+0x2ac/0x550 [ 30.684347] ? prepare_exit_to_usermode+0x350/0x350 [ 30.689333] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 30.694667] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.699481] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.704638] RIP: 0033:0x4433f9 [ 30.707807] RSP: 002b:00007fff78459728 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 30.715483] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00000000004433f9 [ 30.722722] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 30.729961] RBP: 00000000004a4def R08: 00000000200021c0 R09: 0000000000000080 [ 30.737197] R10: 0000000000040001 R11: 0000000000000212 R12: 00007fff78459830 [ 30.744435] R13: 0000000000404180 R14: 0000000000000000 R15: 0000000000000000 [ 30.752120] Dumping ftrace buffer: [ 30.755632] (ftrace buffer empty) [ 30.759311] Kernel Offset: disabled [ 30.762918] Rebooting in 86400 seconds..