[....] Starting enhanced syslogd: rsyslogd[ 16.850552] audit: type=1400 audit(1520366102.772:5): avc: denied { syslog } for pid=4081 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: [ 22.829477] audit: type=1400 audit(1520366108.751:6): avc: denied { map } for pid=4220 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 '10.128.0.30' (ECDSA) to the list of known hosts. [ 29.171993] audit: type=1400 audit(1520366115.093:7): avc: denied { map } for pid=4234 comm="syzkaller744928" path="/root/syzkaller744928696" 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 [ 29.179686] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 29.197897] audit: type=1400 audit(1520366115.096:8): avc: denied { sys_admin } for pid=4234 comm="syzkaller744928" 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 [ 29.227473] audit: type=1400 audit(1520366115.142:9): avc: denied { net_admin } for pid=4235 comm="syzkaller744928" 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 [ 29.442462] 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 [ 29.777113] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 29.783208] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 29.818695] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 29.854888] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 29.867494] audit: type=1400 audit(1520366115.789:10): avc: denied { sys_chroot } for pid=4235 comm="syzkaller744928" 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 [ 29.871350] ================================================================== [ 29.899413] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 29.905880] Read of size 8 at addr ffff8801cc3cb218 by task syzkaller744928/4235 [ 29.913378] [ 29.914978] CPU: 0 PID: 4235 Comm: syzkaller744928 Not tainted 4.16.0-rc4+ #254 [ 29.922390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.931722] Call Trace: [ 29.934281] dump_stack+0x194/0x24d [ 29.937882] ? arch_local_irq_restore+0x53/0x53 [ 29.942521] ? show_regs_print_info+0x18/0x18 [ 29.946993] ? ip6_xmit+0x1f76/0x2260 [ 29.950765] print_address_description+0x73/0x250 [ 29.955579] ? ip6_xmit+0x1f76/0x2260 [ 29.959351] kasan_report+0x23c/0x360 [ 29.963130] __asan_report_load8_noabort+0x14/0x20 [ 29.968030] ip6_xmit+0x1f76/0x2260 [ 29.971640] ? ip6_finish_output2+0x23d0/0x23d0 [ 29.976286] ? fl6_update_dst+0x127/0x2b0 [ 29.980407] ? inet6_csk_route_socket+0x691/0xe80 [ 29.985221] ? trace_hardirqs_off+0x10/0x10 [ 29.989519] ? lock_acquire+0x1d5/0x580 [ 29.993463] ? lock_acquire+0x1d5/0x580 [ 29.997411] ? inet6_csk_xmit+0x114/0x580 [ 30.001531] ? trace_hardirqs_off+0x10/0x10 [ 30.005827] ? lock_release+0xa40/0xa40 [ 30.009787] inet6_csk_xmit+0x2fc/0x580 [ 30.013733] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.018463] ? __sk_dst_check+0x1a5/0x380 [ 30.022582] ? sock_kzfree_s+0x60/0x60 [ 30.026455] l2tp_xmit_skb+0x105f/0x1410 [ 30.030496] ? l2tp_session_create+0xb80/0xb80 [ 30.035049] ? sock_wmalloc+0x15d/0x1d0 [ 30.038998] ? iov_iter_advance+0x13f0/0x13f0 [ 30.043467] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.047764] pppol2tp_sendmsg+0x470/0x670 [ 30.051884] ? selinux_socket_sendmsg+0x36/0x40 [ 30.056527] ? pppol2tp_getsockopt+0x900/0x900 [ 30.061083] sock_sendmsg+0xca/0x110 [ 30.064771] ___sys_sendmsg+0x767/0x8b0 [ 30.068719] ? copy_msghdr_from_user+0x590/0x590 [ 30.073450] ? __pmd_alloc+0x4e0/0x4e0 [ 30.077308] ? selinux_socket_connect+0x311/0x730 [ 30.082122] ? trace_hardirqs_off+0x10/0x10 [ 30.086414] ? find_held_lock+0x35/0x1d0 [ 30.090449] ? __fget_light+0x2b2/0x3c0 [ 30.094394] ? fget_raw+0x20/0x20 [ 30.097834] ? __do_page_fault+0x5f7/0xc90 [ 30.102043] ? lock_downgrade+0x980/0x980 [ 30.106184] __sys_sendmsg+0xe5/0x210 [ 30.109968] ? __sys_sendmsg+0xe5/0x210 [ 30.113922] ? SyS_shutdown+0x290/0x290 [ 30.117880] ? __do_page_fault+0x3d6/0xc90 [ 30.122114] ? move_addr_to_kernel+0x60/0x60 [ 30.126501] SyS_sendmsg+0x2d/0x50 [ 30.130010] ? __sys_sendmsg+0x210/0x210 [ 30.134046] do_syscall_64+0x281/0x940 [ 30.137903] ? __do_page_fault+0xc90/0xc90 [ 30.142106] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.146574] ? finish_task_switch+0x1c1/0x7e0 [ 30.151043] ? syscall_return_slowpath+0x550/0x550 [ 30.155943] ? syscall_return_slowpath+0x2ac/0x550 [ 30.160844] ? prepare_exit_to_usermode+0x350/0x350 [ 30.165833] ? retint_user+0x18/0x18 [ 30.169523] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.174342] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.179500] RIP: 0033:0x441fc9 [ 30.182660] RSP: 002b:00000000007dfe98 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 30.190335] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441fc9 [ 30.197574] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 30.204817] RBP: 00000000004a3fe6 R08: 0000000000000000 R09: 0000000000000000 [ 30.212059] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000007dff70 [ 30.219302] R13: 0000000000403000 R14: 0000000000000000 R15: 0000000000000000 [ 30.226561] [ 30.228159] Allocated by task 0: [ 30.231491] (stack is not available) [ 30.235171] [ 30.236768] Freed by task 0: [ 30.239753] (stack is not available) [ 30.243433] [ 30.245031] The buggy address belongs to the object at ffff8801cc3cb200 [ 30.245031] which belongs to the cache ip_dst_cache of size 160 [ 30.257743] The buggy address is located 24 bytes inside of [ 30.257743] 160-byte region [ffff8801cc3cb200, ffff8801cc3cb2a0) [ 30.269497] The buggy address belongs to the page: [ 30.274395] page:ffffea000730f2c0 count:1 mapcount:0 mapping:ffff8801cc3cb000 index:0x0 [ 30.282507] flags: 0x2fffc0000000100(slab) [ 30.286712] raw: 02fffc0000000100 ffff8801cc3cb000 0000000000000000 0000000100000010 [ 30.294562] raw: ffffea000730eae0 ffff8801d5bb8d48 ffff8801d6bd0340 0000000000000000 [ 30.302412] page dumped because: kasan: bad access detected [ 30.308089] [ 30.309687] Memory state around the buggy address: [ 30.314587] ffff8801cc3cb100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.321913] ffff8801cc3cb180: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 30.329239] >ffff8801cc3cb200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.336564] ^ [ 30.340679] ffff8801cc3cb280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.348012] ffff8801cc3cb300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.355339] ================================================================== [ 30.362663] Disabling lock debugging due to kernel taint [ 30.368111] Kernel panic - not syncing: panic_on_warn set ... [ 30.368111] [ 30.375768] CPU: 0 PID: 4235 Comm: syzkaller744928 Tainted: G B 4.16.0-rc4+ #254 [ 30.384482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.393803] Call Trace: [ 30.396363] dump_stack+0x194/0x24d [ 30.399960] ? arch_local_irq_restore+0x53/0x53 [ 30.404604] ? kasan_end_report+0x32/0x50 [ 30.408725] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.413448] ? vsnprintf+0x1ed/0x1900 [ 30.417217] ? ip6_xmit+0x1ec0/0x2260 [ 30.420990] panic+0x1e4/0x41c [ 30.424159] ? refcount_error_report+0x214/0x214 [ 30.428891] ? add_taint+0x1c/0x50 [ 30.432403] ? add_taint+0x1c/0x50 [ 30.435917] ? ip6_xmit+0x1f76/0x2260 [ 30.439687] kasan_end_report+0x50/0x50 [ 30.443631] kasan_report+0x149/0x360 [ 30.447401] __asan_report_load8_noabort+0x14/0x20 [ 30.452300] ip6_xmit+0x1f76/0x2260 [ 30.455902] ? ip6_finish_output2+0x23d0/0x23d0 [ 30.460538] ? fl6_update_dst+0x127/0x2b0 [ 30.464657] ? inet6_csk_route_socket+0x691/0xe80 [ 30.469471] ? trace_hardirqs_off+0x10/0x10 [ 30.473774] ? lock_acquire+0x1d5/0x580 [ 30.477716] ? lock_acquire+0x1d5/0x580 [ 30.481657] ? inet6_csk_xmit+0x114/0x580 [ 30.485779] ? trace_hardirqs_off+0x10/0x10 [ 30.490071] ? lock_release+0xa40/0xa40 [ 30.494022] inet6_csk_xmit+0x2fc/0x580 [ 30.497965] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.502689] ? __sk_dst_check+0x1a5/0x380 [ 30.506805] ? sock_kzfree_s+0x60/0x60 [ 30.510667] l2tp_xmit_skb+0x105f/0x1410 [ 30.514702] ? l2tp_session_create+0xb80/0xb80 [ 30.519251] ? sock_wmalloc+0x15d/0x1d0 [ 30.523197] ? iov_iter_advance+0x13f0/0x13f0 [ 30.527660] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.531952] pppol2tp_sendmsg+0x470/0x670 [ 30.536069] ? selinux_socket_sendmsg+0x36/0x40 [ 30.540707] ? pppol2tp_getsockopt+0x900/0x900 [ 30.545257] sock_sendmsg+0xca/0x110 [ 30.548939] ___sys_sendmsg+0x767/0x8b0 [ 30.552883] ? copy_msghdr_from_user+0x590/0x590 [ 30.557608] ? __pmd_alloc+0x4e0/0x4e0 [ 30.561462] ? selinux_socket_connect+0x311/0x730 [ 30.566272] ? trace_hardirqs_off+0x10/0x10 [ 30.570568] ? find_held_lock+0x35/0x1d0 [ 30.574598] ? __fget_light+0x2b2/0x3c0 [ 30.578541] ? fget_raw+0x20/0x20 [ 30.581969] ? __do_page_fault+0x5f7/0xc90 [ 30.586174] ? lock_downgrade+0x980/0x980 [ 30.590293] __sys_sendmsg+0xe5/0x210 [ 30.594062] ? __sys_sendmsg+0xe5/0x210 [ 30.598008] ? SyS_shutdown+0x290/0x290 [ 30.601954] ? __do_page_fault+0x3d6/0xc90 [ 30.606162] ? move_addr_to_kernel+0x60/0x60 [ 30.610542] SyS_sendmsg+0x2d/0x50 [ 30.614050] ? __sys_sendmsg+0x210/0x210 [ 30.618081] do_syscall_64+0x281/0x940 [ 30.621937] ? __do_page_fault+0xc90/0xc90 [ 30.626141] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.630606] ? finish_task_switch+0x1c1/0x7e0 [ 30.635072] ? syscall_return_slowpath+0x550/0x550 [ 30.639968] ? syscall_return_slowpath+0x2ac/0x550 [ 30.644868] ? prepare_exit_to_usermode+0x350/0x350 [ 30.649853] ? retint_user+0x18/0x18 [ 30.653538] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.658350] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.663505] RIP: 0033:0x441fc9 [ 30.666661] RSP: 002b:00000000007dfe98 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 30.674335] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441fc9 [ 30.681576] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 30.688811] RBP: 00000000004a3fe6 R08: 0000000000000000 R09: 0000000000000000 [ 30.696051] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000007dff70 [ 30.703289] R13: 0000000000403000 R14: 0000000000000000 R15: 0000000000000000 [ 30.710954] Dumping ftrace buffer: [ 30.714462] (ftrace buffer empty) [ 30.718144] Kernel Offset: disabled [ 30.721749] Rebooting in 86400 seconds..