[....] Starting enhanced syslogd: rsyslogd[ 14.809940] audit: type=1400 audit(1520373857.771:5): avc: denied { syslog } for pid=3872 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: [ 18.892153] audit: type=1400 audit(1520373861.853:6): avc: denied { map } for pid=4012 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 '10.128.10.3' (ECDSA) to the list of known hosts. [ 29.478662] audit: type=1400 audit(1520373872.440:7): avc: denied { map } for pid=4027 comm="syzkaller543566" path="/root/syzkaller543566965" 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 [ 29.490259] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 29.504587] audit: type=1400 audit(1520373872.444:8): avc: denied { sys_admin } for pid=4027 comm="syzkaller543566" 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 [ 29.552799] audit: type=1400 audit(1520373872.514:9): avc: denied { net_admin } for pid=4028 comm="syzkaller543566" 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 [ 29.787825] 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 [ 30.143570] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.149692] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 30.187206] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.226167] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.238525] audit: type=1400 audit(1520373873.200:10): avc: denied { sys_chroot } for pid=4028 comm="syzkaller543566" 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 [ 30.243471] ================================================================== [ 30.270498] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.276960] Read of size 8 at addr ffff8801d8d6d118 by task syzkaller543566/4028 [ 30.284459] [ 30.286067] CPU: 0 PID: 4028 Comm: syzkaller543566 Not tainted 4.16.0-rc4+ #343 [ 30.293480] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.302801] Call Trace: [ 30.305362] dump_stack+0x194/0x24d [ 30.308964] ? arch_local_irq_restore+0x53/0x53 [ 30.313605] ? show_regs_print_info+0x18/0x18 [ 30.318077] ? ip6_xmit+0x1f76/0x2260 [ 30.321848] print_address_description+0x73/0x250 [ 30.326660] ? ip6_xmit+0x1f76/0x2260 [ 30.330433] kasan_report+0x23c/0x360 [ 30.334210] __asan_report_load8_noabort+0x14/0x20 [ 30.339114] ip6_xmit+0x1f76/0x2260 [ 30.342724] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.347367] ? fl6_update_dst+0x127/0x2b0 [ 30.351491] ? inet6_csk_route_socket+0x691/0xe80 [ 30.356306] ? trace_hardirqs_off+0x10/0x10 [ 30.360600] ? lock_acquire+0x1d5/0x580 [ 30.364545] ? lock_acquire+0x1d5/0x580 [ 30.368490] ? inet6_csk_xmit+0x114/0x580 [ 30.372610] ? trace_hardirqs_off+0x10/0x10 [ 30.376906] ? lock_release+0xa40/0xa40 [ 30.380868] inet6_csk_xmit+0x2fc/0x580 [ 30.384816] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.389544] ? __sk_dst_check+0x1a5/0x380 [ 30.393665] ? sock_kfree_s+0x60/0x60 [ 30.397453] l2tp_xmit_skb+0x105f/0x1410 [ 30.401496] ? l2tp_session_create+0xb80/0xb80 [ 30.406050] ? sock_wmalloc+0x15d/0x1d0 [ 30.409998] ? iov_iter_advance+0x13f0/0x13f0 [ 30.414475] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.418772] pppol2tp_sendmsg+0x470/0x670 [ 30.422893] ? selinux_socket_sendmsg+0x36/0x40 [ 30.427537] ? pppol2tp_getsockopt+0x900/0x900 [ 30.432091] sock_sendmsg+0xca/0x110 [ 30.435791] ___sys_sendmsg+0x767/0x8b0 [ 30.439742] ? copy_msghdr_from_user+0x590/0x590 [ 30.444474] ? __pmd_alloc+0x4e0/0x4e0 [ 30.448335] ? selinux_socket_connect+0x311/0x730 [ 30.453150] ? trace_hardirqs_off+0x10/0x10 [ 30.457447] ? find_held_lock+0x35/0x1d0 [ 30.461483] ? __fget_light+0x2b2/0x3c0 [ 30.465432] ? fget_raw+0x20/0x20 [ 30.468874] ? __do_page_fault+0x5f7/0xc90 [ 30.473084] ? lock_downgrade+0x980/0x980 [ 30.477214] __sys_sendmsg+0xe5/0x210 [ 30.480987] ? __sys_sendmsg+0xe5/0x210 [ 30.484936] ? SyS_shutdown+0x290/0x290 [ 30.488893] ? __do_page_fault+0x3d6/0xc90 [ 30.493117] ? move_addr_to_kernel+0x60/0x60 [ 30.497504] SyS_sendmsg+0x2d/0x50 [ 30.501025] ? __sys_sendmsg+0x210/0x210 [ 30.505065] do_syscall_64+0x281/0x940 [ 30.508923] ? __do_page_fault+0xc90/0xc90 [ 30.513131] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.517611] ? finish_task_switch+0x1c1/0x7e0 [ 30.522081] ? syscall_return_slowpath+0x550/0x550 [ 30.526986] ? syscall_return_slowpath+0x2ac/0x550 [ 30.531888] ? prepare_exit_to_usermode+0x350/0x350 [ 30.536875] ? retint_user+0x18/0x18 [ 30.540566] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.545386] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.550551] RIP: 0033:0x441ef9 [ 30.553715] RSP: 002b:00000000007dfea8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 30.561394] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ef9 [ 30.568633] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 30.575876] RBP: 00000000004a3f26 R08: 0000000120080522 R09: 0000000120080522 [ 30.583122] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000007dff70 [ 30.590365] R13: 0000000000402f30 R14: 0000000000000000 R15: 0000000000000000 [ 30.597620] [ 30.599222] Allocated by task 0: [ 30.602554] (stack is not available) [ 30.606233] [ 30.607832] Freed by task 0: [ 30.610907] (stack is not available) [ 30.614586] [ 30.616188] The buggy address belongs to the object at ffff8801d8d6d100 [ 30.616188] which belongs to the cache ip_dst_cache of size 168 [ 30.628903] The buggy address is located 24 bytes inside of [ 30.628903] 168-byte region [ffff8801d8d6d100, ffff8801d8d6d1a8) [ 30.640664] The buggy address belongs to the page: [ 30.645563] page:ffffea0007635b40 count:1 mapcount:0 mapping:ffff8801d8d6d000 index:0x0 [ 30.653674] flags: 0x2fffc0000000100(slab) [ 30.657879] raw: 02fffc0000000100 ffff8801d8d6d000 0000000000000000 0000000100000010 [ 30.665733] raw: ffffea00076358e0 ffff8801d5bb2e48 ffff8801d6bf51c0 0000000000000000 [ 30.673585] page dumped because: kasan: bad access detected [ 30.679262] [ 30.680858] Memory state around the buggy address: [ 30.685759] ffff8801d8d6d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.693177] ffff8801d8d6d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.700507] >ffff8801d8d6d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.707834] ^ [ 30.711951] ffff8801d8d6d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.719286] ffff8801d8d6d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.726623] ================================================================== [ 30.733956] Disabling lock debugging due to kernel taint [ 30.739422] Kernel panic - not syncing: panic_on_warn set ... [ 30.739422] [ 30.746761] CPU: 0 PID: 4028 Comm: syzkaller543566 Tainted: G B 4.16.0-rc4+ #343 [ 30.755478] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.764801] Call Trace: [ 30.767358] dump_stack+0x194/0x24d [ 30.770957] ? arch_local_irq_restore+0x53/0x53 [ 30.775593] ? kasan_end_report+0x32/0x50 [ 30.779710] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.784434] ? vsnprintf+0x1ed/0x1900 [ 30.788205] ? ip6_xmit+0x1f30/0x2260 [ 30.791976] panic+0x1e4/0x41c [ 30.795137] ? refcount_error_report+0x214/0x214 [ 30.799861] ? add_taint+0x1c/0x50 [ 30.803367] ? add_taint+0x1c/0x50 [ 30.806877] ? ip6_xmit+0x1f76/0x2260 [ 30.810647] kasan_end_report+0x50/0x50 [ 30.814590] kasan_report+0x149/0x360 [ 30.818360] __asan_report_load8_noabort+0x14/0x20 [ 30.823259] ip6_xmit+0x1f76/0x2260 [ 30.826870] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.831510] ? fl6_update_dst+0x127/0x2b0 [ 30.835628] ? inet6_csk_route_socket+0x691/0xe80 [ 30.840444] ? trace_hardirqs_off+0x10/0x10 [ 30.844733] ? lock_acquire+0x1d5/0x580 [ 30.848676] ? lock_acquire+0x1d5/0x580 [ 30.852618] ? inet6_csk_xmit+0x114/0x580 [ 30.856734] ? trace_hardirqs_off+0x10/0x10 [ 30.861027] ? lock_release+0xa40/0xa40 [ 30.864977] inet6_csk_xmit+0x2fc/0x580 [ 30.868921] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.873645] ? __sk_dst_check+0x1a5/0x380 [ 30.877762] ? sock_kfree_s+0x60/0x60 [ 30.881541] l2tp_xmit_skb+0x105f/0x1410 [ 30.885577] ? l2tp_session_create+0xb80/0xb80 [ 30.890130] ? sock_wmalloc+0x15d/0x1d0 [ 30.894079] ? iov_iter_advance+0x13f0/0x13f0 [ 30.898549] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.902842] pppol2tp_sendmsg+0x470/0x670 [ 30.906959] ? selinux_socket_sendmsg+0x36/0x40 [ 30.911600] ? pppol2tp_getsockopt+0x900/0x900 [ 30.916160] sock_sendmsg+0xca/0x110 [ 30.919843] ___sys_sendmsg+0x767/0x8b0 [ 30.923786] ? copy_msghdr_from_user+0x590/0x590 [ 30.928512] ? __pmd_alloc+0x4e0/0x4e0 [ 30.932370] ? selinux_socket_connect+0x311/0x730 [ 30.937183] ? trace_hardirqs_off+0x10/0x10 [ 30.941471] ? find_held_lock+0x35/0x1d0 [ 30.945502] ? __fget_light+0x2b2/0x3c0 [ 30.949446] ? fget_raw+0x20/0x20 [ 30.952876] ? __do_page_fault+0x5f7/0xc90 [ 30.957077] ? lock_downgrade+0x980/0x980 [ 30.961206] __sys_sendmsg+0xe5/0x210 [ 30.964975] ? __sys_sendmsg+0xe5/0x210 [ 30.968927] ? SyS_shutdown+0x290/0x290 [ 30.972873] ? __do_page_fault+0x3d6/0xc90 [ 30.977083] ? move_addr_to_kernel+0x60/0x60 [ 30.981471] SyS_sendmsg+0x2d/0x50 [ 30.984986] ? __sys_sendmsg+0x210/0x210 [ 30.989017] do_syscall_64+0x281/0x940 [ 30.992874] ? __do_page_fault+0xc90/0xc90 [ 30.997082] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.001547] ? finish_task_switch+0x1c1/0x7e0 [ 31.006014] ? syscall_return_slowpath+0x550/0x550 [ 31.010913] ? syscall_return_slowpath+0x2ac/0x550 [ 31.015812] ? prepare_exit_to_usermode+0x350/0x350 [ 31.020799] ? retint_user+0x18/0x18 [ 31.024482] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.029296] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.034460] RIP: 0033:0x441ef9 [ 31.037618] RSP: 002b:00000000007dfea8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 31.045294] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ef9 [ 31.052531] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 31.059770] RBP: 00000000004a3f26 R08: 0000000120080522 R09: 0000000120080522 [ 31.067006] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000007dff70 [ 31.074243] R13: 0000000000402f30 R14: 0000000000000000 R15: 0000000000000000 [ 31.081810] Dumping ftrace buffer: [ 31.085318] (ftrace buffer empty) [ 31.088995] Kernel Offset: disabled [ 31.092589] Rebooting in 86400 seconds..