[....] Starting enhanced syslogd: rsyslogd[ 16.329206] audit: type=1400 audit(1519959019.681:5): avc: denied { syslog } for pid=4092 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: [ 22.147548] audit: type=1400 audit(1519959025.499:6): avc: denied { map } for pid=4232 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 '10.128.10.1' (ECDSA) to the list of known hosts. [ 28.761712] audit: type=1400 audit(1519959032.113:7): avc: denied { map } for pid=4246 comm="syzkaller460798" path="/root/syzkaller460798460" 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 [ 28.773418] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 28.787642] audit: type=1400 audit(1519959032.117:8): avc: denied { sys_admin } for pid=4246 comm="syzkaller460798" capability=21 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 28.836556] audit: type=1400 audit(1519959032.189:9): avc: denied { net_admin } for pid=4247 comm="syzkaller460798" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 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 [ 29.073633] 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 [ 29.419331] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 29.425423] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 29.462704] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 29.499960] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.511517] audit: type=1400 audit(1519959032.863:10): avc: denied { sys_chroot } for pid=4247 comm="syzkaller460798" capability=18 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 [ 29.514863] ================================================================== [ 29.543481] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 29.549942] Read of size 8 at addr ffff8801cc631218 by task syzkaller460798/4247 [ 29.557441] [ 29.559044] CPU: 0 PID: 4247 Comm: syzkaller460798 Not tainted 4.16.0-rc2+ #247 [ 29.566456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.575778] Call Trace: [ 29.578342] dump_stack+0x194/0x24d [ 29.581943] ? arch_local_irq_restore+0x53/0x53 [ 29.586583] ? show_regs_print_info+0x18/0x18 [ 29.591058] ? ip6_xmit+0x1f76/0x2260 [ 29.594832] print_address_description+0x73/0x250 [ 29.599647] ? ip6_xmit+0x1f76/0x2260 [ 29.603417] kasan_report+0x23b/0x360 [ 29.607192] __asan_report_load8_noabort+0x14/0x20 [ 29.612090] ip6_xmit+0x1f76/0x2260 [ 29.615701] ? ip6_finish_output2+0x23d0/0x23d0 [ 29.620344] ? fl6_update_dst+0x127/0x2b0 [ 29.624466] ? inet6_csk_route_socket+0x691/0xe80 [ 29.629287] ? check_noncircular+0x20/0x20 [ 29.633491] ? lock_acquire+0x1d5/0x580 [ 29.637439] ? lock_acquire+0x1d5/0x580 [ 29.641383] ? inet6_csk_xmit+0x114/0x580 [ 29.645501] ? check_noncircular+0x20/0x20 [ 29.649710] ? lock_release+0xa40/0xa40 [ 29.653673] inet6_csk_xmit+0x2fc/0x580 [ 29.657620] ? inet6_csk_update_pmtu+0x160/0x160 [ 29.662347] ? __sk_dst_check+0x1a5/0x380 [ 29.666467] ? sk_wait_data+0x610/0x610 [ 29.670427] l2tp_xmit_skb+0x105f/0x1410 [ 29.674470] ? l2tp_session_create+0xb80/0xb80 [ 29.679031] ? sock_wmalloc+0x15d/0x1d0 [ 29.682981] ? iov_iter_advance+0x13f0/0x13f0 [ 29.687451] ? pppol2tp_sendmsg+0x41b/0x670 [ 29.691748] pppol2tp_sendmsg+0x470/0x670 [ 29.695868] ? selinux_socket_sendmsg+0x36/0x40 [ 29.700512] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 29.705327] sock_sendmsg+0xca/0x110 [ 29.709023] SYSC_sendto+0x361/0x5c0 [ 29.712714] ? SYSC_connect+0x4a0/0x4a0 [ 29.716668] ? inet_dgram_connect+0x172/0x1f0 [ 29.721137] ? SYSC_connect+0x2e0/0x4a0 [ 29.725113] ? mm_fault_error+0x2c0/0x2c0 [ 29.729233] ? move_addr_to_kernel+0x60/0x60 [ 29.733617] SyS_sendto+0x40/0x50 [ 29.737042] ? SyS_getpeername+0x30/0x30 [ 29.741075] do_syscall_64+0x280/0x940 [ 29.744931] ? __do_page_fault+0xc90/0xc90 [ 29.749135] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.753600] ? finish_task_switch+0x1c1/0x7e0 [ 29.758069] ? syscall_return_slowpath+0x550/0x550 [ 29.762970] ? syscall_return_slowpath+0x2ac/0x550 [ 29.767870] ? prepare_exit_to_usermode+0x350/0x350 [ 29.772856] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 29.778193] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.783021] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 29.788185] RIP: 0033:0x4436b9 [ 29.791345] RSP: 002b:00000000007efe68 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 29.799025] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00000000004436b9 [ 29.806267] RDX: 0000000000000000 RSI: 0000000020de7000 RDI: 0000000000000004 [ 29.813507] RBP: 00000000004a5559 R08: 0000000020000000 R09: 0000000000000000 [ 29.820747] R10: c3fe68eda9554f8b R11: 0000000000000216 R12: 00000000007eff70 [ 29.827987] R13: 00000000004046f0 R14: 0000000000000000 R15: 0000000000000000 [ 29.835247] [ 29.836846] Allocated by task 0: [ 29.840177] (stack is not available) [ 29.843857] [ 29.845455] Freed by task 0: [ 29.848438] (stack is not available) [ 29.852117] [ 29.853715] The buggy address belongs to the object at ffff8801cc631200 [ 29.853715] which belongs to the cache ip_dst_cache of size 160 [ 29.866424] The buggy address is located 24 bytes inside of [ 29.866424] 160-byte region [ffff8801cc631200, ffff8801cc6312a0) [ 29.878176] The buggy address belongs to the page: [ 29.883077] page:ffffea0007318c40 count:1 mapcount:0 mapping:ffff8801cc631000 index:0x0 [ 29.891189] flags: 0x2fffc0000000100(slab) [ 29.895394] raw: 02fffc0000000100 ffff8801cc631000 0000000000000000 0000000100000010 [ 29.903243] raw: ffffea0007626c20 ffff8801d6fa1e48 ffff8801d5be5e00 0000000000000000 [ 29.911089] page dumped because: kasan: bad access detected [ 29.916764] [ 29.918360] Memory state around the buggy address: [ 29.923256] ffff8801cc631100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.930586] ffff8801cc631180: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 29.937914] >ffff8801cc631200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.945241] ^ [ 29.949357] ffff8801cc631280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.956686] ffff8801cc631300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.964017] ================================================================== [ 29.971345] Disabling lock debugging due to kernel taint [ 29.976799] Kernel panic - not syncing: panic_on_warn set ... [ 29.976799] [ 29.984140] CPU: 0 PID: 4247 Comm: syzkaller460798 Tainted: G B 4.16.0-rc2+ #247 [ 29.992856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.002192] Call Trace: [ 30.004754] dump_stack+0x194/0x24d [ 30.008354] ? arch_local_irq_restore+0x53/0x53 [ 30.012992] ? kasan_end_report+0x32/0x50 [ 30.017113] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.021837] ? vsnprintf+0x1ed/0x1900 [ 30.025607] ? ip6_xmit+0x1f40/0x2260 [ 30.029376] panic+0x1e4/0x41c [ 30.032538] ? refcount_error_report+0x214/0x214 [ 30.037266] ? add_taint+0x1c/0x50 [ 30.040773] ? add_taint+0x1c/0x50 [ 30.044284] ? ip6_xmit+0x1f76/0x2260 [ 30.048053] kasan_end_report+0x50/0x50 [ 30.051993] kasan_report+0x148/0x360 [ 30.055769] __asan_report_load8_noabort+0x14/0x20 [ 30.060664] ip6_xmit+0x1f76/0x2260 [ 30.064266] ? ip6_finish_output2+0x23d0/0x23d0 [ 30.068906] ? fl6_update_dst+0x127/0x2b0 [ 30.073027] ? inet6_csk_route_socket+0x691/0xe80 [ 30.077841] ? check_noncircular+0x20/0x20 [ 30.082043] ? lock_acquire+0x1d5/0x580 [ 30.085987] ? lock_acquire+0x1d5/0x580 [ 30.089929] ? inet6_csk_xmit+0x114/0x580 [ 30.094048] ? check_noncircular+0x20/0x20 [ 30.098254] ? lock_release+0xa40/0xa40 [ 30.102206] inet6_csk_xmit+0x2fc/0x580 [ 30.106153] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.110876] ? __sk_dst_check+0x1a5/0x380 [ 30.114993] ? sk_wait_data+0x610/0x610 [ 30.118948] l2tp_xmit_skb+0x105f/0x1410 [ 30.122983] ? l2tp_session_create+0xb80/0xb80 [ 30.127533] ? sock_wmalloc+0x15d/0x1d0 [ 30.131478] ? iov_iter_advance+0x13f0/0x13f0 [ 30.135945] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.140240] pppol2tp_sendmsg+0x470/0x670 [ 30.144359] ? selinux_socket_sendmsg+0x36/0x40 [ 30.149000] ? pppol2tp_session_ioctl+0xa90/0xa90 [ 30.153817] sock_sendmsg+0xca/0x110 [ 30.157501] SYSC_sendto+0x361/0x5c0 [ 30.161186] ? SYSC_connect+0x4a0/0x4a0 [ 30.165136] ? inet_dgram_connect+0x172/0x1f0 [ 30.169602] ? SYSC_connect+0x2e0/0x4a0 [ 30.173560] ? mm_fault_error+0x2c0/0x2c0 [ 30.177675] ? move_addr_to_kernel+0x60/0x60 [ 30.182056] SyS_sendto+0x40/0x50 [ 30.185478] ? SyS_getpeername+0x30/0x30 [ 30.189511] do_syscall_64+0x280/0x940 [ 30.193366] ? __do_page_fault+0xc90/0xc90 [ 30.197570] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.202035] ? finish_task_switch+0x1c1/0x7e0 [ 30.206498] ? syscall_return_slowpath+0x550/0x550 [ 30.211398] ? syscall_return_slowpath+0x2ac/0x550 [ 30.216297] ? prepare_exit_to_usermode+0x350/0x350 [ 30.221283] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 30.226618] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.231433] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.236590] RIP: 0033:0x4436b9 [ 30.239747] RSP: 002b:00000000007efe68 EFLAGS: 00000216 ORIG_RAX: 000000000000002c [ 30.247422] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 00000000004436b9 [ 30.254663] RDX: 0000000000000000 RSI: 0000000020de7000 RDI: 0000000000000004 [ 30.261901] RBP: 00000000004a5559 R08: 0000000020000000 R09: 0000000000000000 [ 30.269148] R10: c3fe68eda9554f8b R11: 0000000000000216 R12: 00000000007eff70 [ 30.276385] R13: 00000000004046f0 R14: 0000000000000000 R15: 0000000000000000 [ 30.284060] Dumping ftrace buffer: [ 30.287570] (ftrace buffer empty) [ 30.291252] Kernel Offset: disabled [ 30.294846] Rebooting in 86400 seconds..