[....] Starting enhanced syslogd: rsyslogd[ 15.694642] audit: type=1400 audit(1520725107.175:5): avc: denied { syslog } for pid=4072 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: [ 17.927078] audit: type=1400 audit(1520725109.407:6): avc: denied { map } for pid=4212 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. [ 26.920519] audit: type=1400 audit(1520725118.401:7): avc: denied { map } for pid=4227 comm="syzkaller821565" path="/root/syzkaller821565580" 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 [ 26.932663] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 26.946542] audit: type=1400 audit(1520725118.401:8): avc: denied { sys_admin } for pid=4227 comm="syzkaller821565" 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 [ 26.979291] audit: type=1400 audit(1520725118.459:9): avc: denied { net_admin } for pid=4228 comm="syzkaller821565" 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 [ 27.222487] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument [ 27.581277] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 27.587375] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 27.626191] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 27.665507] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 27.677367] audit: type=1400 audit(1520725119.158:10): avc: denied { sys_chroot } for pid=4228 comm="syzkaller821565" 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 [ 27.680784] ================================================================== [ 27.709362] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 27.715827] Read of size 8 at addr ffff8801b69d6218 by task syzkaller821565/4228 [ 27.723333] [ 27.724936] CPU: 1 PID: 4228 Comm: syzkaller821565 Not tainted 4.16.0-rc4+ #349 [ 27.732350] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.741681] Call Trace: [ 27.744254] dump_stack+0x194/0x24d [ 27.747866] ? arch_local_irq_restore+0x53/0x53 [ 27.752507] ? show_regs_print_info+0x18/0x18 [ 27.756979] ? ip6_xmit+0x1f76/0x2260 [ 27.760763] print_address_description+0x73/0x250 [ 27.765578] ? ip6_xmit+0x1f76/0x2260 [ 27.769351] kasan_report+0x23c/0x360 [ 27.773127] __asan_report_load8_noabort+0x14/0x20 [ 27.778033] ip6_xmit+0x1f76/0x2260 [ 27.781652] ? ip6_finish_output2+0x23a0/0x23a0 [ 27.786295] ? fl6_update_dst+0x127/0x2b0 [ 27.790420] ? inet6_csk_route_socket+0x691/0xe80 [ 27.795245] ? trace_hardirqs_off+0x10/0x10 [ 27.799538] ? lock_acquire+0x1d5/0x580 [ 27.803485] ? lock_acquire+0x1d5/0x580 [ 27.807428] ? inet6_csk_xmit+0x114/0x580 [ 27.811549] ? trace_hardirqs_off+0x10/0x10 [ 27.815844] ? lock_release+0xa40/0xa40 [ 27.819806] inet6_csk_xmit+0x2fc/0x580 [ 27.823755] ? inet6_csk_update_pmtu+0x160/0x160 [ 27.828483] ? __sk_dst_check+0x1a5/0x380 [ 27.832604] ? sock_kfree_s+0x60/0x60 [ 27.836391] l2tp_xmit_skb+0x105f/0x1410 [ 27.840433] ? l2tp_session_create+0xb80/0xb80 [ 27.844986] ? sock_wmalloc+0x15d/0x1d0 [ 27.848939] ? iov_iter_advance+0x13f0/0x13f0 [ 27.853410] ? pppol2tp_sendmsg+0x41b/0x670 [ 27.857708] pppol2tp_sendmsg+0x470/0x670 [ 27.861837] ? selinux_socket_sendmsg+0x36/0x40 [ 27.866480] ? pppol2tp_getsockopt+0x900/0x900 [ 27.871041] sock_sendmsg+0xca/0x110 [ 27.874728] SYSC_sendto+0x361/0x5c0 [ 27.878417] ? SYSC_connect+0x4a0/0x4a0 [ 27.882371] ? inet_dgram_connect+0x172/0x1f0 [ 27.886841] ? SYSC_connect+0x2e0/0x4a0 [ 27.890820] ? mm_fault_error+0x2c0/0x2c0 [ 27.894941] ? move_addr_to_kernel+0x60/0x60 [ 27.899324] SyS_sendto+0x40/0x50 [ 27.902748] ? SyS_getpeername+0x30/0x30 [ 27.906791] do_syscall_64+0x281/0x940 [ 27.910652] ? __do_page_fault+0xc90/0xc90 [ 27.914859] ? _raw_spin_unlock_irq+0x27/0x70 [ 27.919327] ? finish_task_switch+0x1c1/0x7e0 [ 27.923795] ? syscall_return_slowpath+0x550/0x550 [ 27.928701] ? syscall_return_slowpath+0x2ac/0x550 [ 27.933601] ? prepare_exit_to_usermode+0x350/0x350 [ 27.938591] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 27.943931] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 27.948752] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 27.953914] RIP: 0033:0x441f59 [ 27.957075] RSP: 002b:00000000007dfe88 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 27.964753] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441f59 [ 27.971995] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 27.979239] RBP: 00000000004a3f86 R08: 00000000200021c0 R09: 0000000000000080 [ 27.986479] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 27.993723] R13: 0000000000402f90 R14: 0000000000000000 R15: 0000000000000000 [ 28.000981] [ 28.002580] Allocated by task 0: [ 28.005913] (stack is not available) [ 28.009592] [ 28.011189] Freed by task 0: [ 28.014179] (stack is not available) [ 28.017861] [ 28.019459] The buggy address belongs to the object at ffff8801b69d6200 [ 28.019459] which belongs to the cache ip_dst_cache of size 168 [ 28.032172] The buggy address is located 24 bytes inside of [ 28.032172] 168-byte region [ffff8801b69d6200, ffff8801b69d62a8) [ 28.043937] The buggy address belongs to the page: [ 28.048837] page:ffffea0006da7580 count:1 mapcount:0 mapping:ffff8801b69d6000 index:0x0 [ 28.056960] flags: 0x2fffc0000000100(slab) [ 28.061166] raw: 02fffc0000000100 ffff8801b69d6000 0000000000000000 0000000100000010 [ 28.069028] raw: ffff8801d6bae248 ffff8801d6bae248 ffff8801d5b8ab00 0000000000000000 [ 28.076890] page dumped because: kasan: bad access detected [ 28.082573] [ 28.084172] Memory state around the buggy address: [ 28.089089] ffff8801b69d6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.096426] ffff8801b69d6180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 28.103767] >ffff8801b69d6200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.111100] ^ [ 28.115219] ffff8801b69d6280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.122550] ffff8801b69d6300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.129882] ================================================================== [ 28.137213] Disabling lock debugging due to kernel taint [ 28.142675] Kernel panic - not syncing: panic_on_warn set ... [ 28.142675] [ 28.150029] CPU: 1 PID: 4228 Comm: syzkaller821565 Tainted: G B 4.16.0-rc4+ #349 [ 28.158755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.168081] Call Trace: [ 28.170640] dump_stack+0x194/0x24d [ 28.174239] ? arch_local_irq_restore+0x53/0x53 [ 28.178880] ? kasan_end_report+0x32/0x50 [ 28.183000] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 28.187733] ? vsnprintf+0x1ed/0x1900 [ 28.191507] ? ip6_xmit+0x1f30/0x2260 [ 28.195281] panic+0x1e4/0x41c [ 28.198445] ? refcount_error_report+0x214/0x214 [ 28.203171] ? add_taint+0x1c/0x50 [ 28.206685] ? add_taint+0x1c/0x50 [ 28.210202] ? ip6_xmit+0x1f76/0x2260 [ 28.213982] kasan_end_report+0x50/0x50 [ 28.217927] kasan_report+0x149/0x360 [ 28.221701] __asan_report_load8_noabort+0x14/0x20 [ 28.226601] ip6_xmit+0x1f76/0x2260 [ 28.230205] ? ip6_finish_output2+0x23a0/0x23a0 [ 28.234846] ? fl6_update_dst+0x127/0x2b0 [ 28.238965] ? inet6_csk_route_socket+0x691/0xe80 [ 28.243780] ? trace_hardirqs_off+0x10/0x10 [ 28.248074] ? lock_acquire+0x1d5/0x580 [ 28.252021] ? lock_acquire+0x1d5/0x580 [ 28.255967] ? inet6_csk_xmit+0x114/0x580 [ 28.260085] ? trace_hardirqs_off+0x10/0x10 [ 28.264387] ? lock_release+0xa40/0xa40 [ 28.268339] inet6_csk_xmit+0x2fc/0x580 [ 28.272284] ? inet6_csk_update_pmtu+0x160/0x160 [ 28.277014] ? __sk_dst_check+0x1a5/0x380 [ 28.281137] ? sock_kfree_s+0x60/0x60 [ 28.284929] l2tp_xmit_skb+0x105f/0x1410 [ 28.288977] ? l2tp_session_create+0xb80/0xb80 [ 28.293532] ? sock_wmalloc+0x15d/0x1d0 [ 28.297481] ? iov_iter_advance+0x13f0/0x13f0 [ 28.301951] ? pppol2tp_sendmsg+0x41b/0x670 [ 28.306246] pppol2tp_sendmsg+0x470/0x670 [ 28.310366] ? selinux_socket_sendmsg+0x36/0x40 [ 28.315008] ? pppol2tp_getsockopt+0x900/0x900 [ 28.319567] sock_sendmsg+0xca/0x110 [ 28.323253] SYSC_sendto+0x361/0x5c0 [ 28.326946] ? SYSC_connect+0x4a0/0x4a0 [ 28.330896] ? inet_dgram_connect+0x172/0x1f0 [ 28.335362] ? SYSC_connect+0x2e0/0x4a0 [ 28.339323] ? mm_fault_error+0x2c0/0x2c0 [ 28.343442] ? move_addr_to_kernel+0x60/0x60 [ 28.347822] SyS_sendto+0x40/0x50 [ 28.351247] ? SyS_getpeername+0x30/0x30 [ 28.355280] do_syscall_64+0x281/0x940 [ 28.359137] ? __do_page_fault+0xc90/0xc90 [ 28.363341] ? _raw_spin_unlock_irq+0x27/0x70 [ 28.367808] ? finish_task_switch+0x1c1/0x7e0 [ 28.372277] ? syscall_return_slowpath+0x550/0x550 [ 28.377179] ? syscall_return_slowpath+0x2ac/0x550 [ 28.382081] ? prepare_exit_to_usermode+0x350/0x350 [ 28.387073] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 28.392420] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 28.397237] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 28.402397] RIP: 0033:0x441f59 [ 28.405555] RSP: 002b:00000000007dfe88 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 28.413231] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441f59 [ 28.420472] RDX: 0000000000000000 RSI: 0000000020001180 RDI: 0000000000000004 [ 28.427714] RBP: 00000000004a3f86 R08: 00000000200021c0 R09: 0000000000000080 [ 28.434953] R10: 0000000000040001 R11: 0000000000000212 R12: 00000000007dff70 [ 28.442194] R13: 0000000000402f90 R14: 0000000000000000 R15: 0000000000000000 [ 28.449902] Dumping ftrace buffer: [ 28.453411] (ftrace buffer empty) [ 28.457098] Kernel Offset: disabled [ 28.460698] Rebooting in 86400 seconds..