[....] Starting enhanced syslogd: rsyslogd[ 17.190092] audit: type=1400 audit(1520369041.855:5): avc: denied { syslog } for pid=4084 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: [ 23.290438] audit: type=1400 audit(1520369047.956:6): avc: denied { map } for pid=4224 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 '10.128.0.37' (ECDSA) to the list of known hosts. [ 29.580601] audit: type=1400 audit(1520369054.246:7): avc: denied { map } for pid=4238 comm="syzkaller310860" path="/root/syzkaller310860870" 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 [ 29.592566] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 29.606745] audit: type=1400 audit(1520369054.246:8): avc: denied { sys_admin } for pid=4238 comm="syzkaller310860" 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 [ 29.639312] audit: type=1400 audit(1520369054.304:9): avc: denied { net_admin } for pid=4239 comm="syzkaller310860" 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 [ 29.881211] 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 [ 30.238799] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.244900] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 30.282174] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.319755] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.331513] audit: type=1400 audit(1520369054.997:10): avc: denied { sys_chroot } for pid=4239 comm="syzkaller310860" 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 [ 30.336030] ================================================================== [ 30.363456] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.369919] Read of size 8 at addr ffff8801d6d78118 by task syzkaller310860/4239 [ 30.377420] [ 30.379024] CPU: 0 PID: 4239 Comm: syzkaller310860 Not tainted 4.16.0-rc4+ #343 [ 30.386439] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.395764] Call Trace: [ 30.398325] dump_stack+0x194/0x24d [ 30.401925] ? arch_local_irq_restore+0x53/0x53 [ 30.406578] ? show_regs_print_info+0x18/0x18 [ 30.411050] ? ip6_xmit+0x1f76/0x2260 [ 30.414826] print_address_description+0x73/0x250 [ 30.419650] ? ip6_xmit+0x1f76/0x2260 [ 30.423423] kasan_report+0x23c/0x360 [ 30.427198] __asan_report_load8_noabort+0x14/0x20 [ 30.432096] ip6_xmit+0x1f76/0x2260 [ 30.435706] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.440349] ? fl6_update_dst+0x127/0x2b0 [ 30.444472] ? inet6_csk_route_socket+0x691/0xe80 [ 30.449287] ? trace_hardirqs_off+0x10/0x10 [ 30.453578] ? lock_acquire+0x1d5/0x580 [ 30.457525] ? lock_acquire+0x1d5/0x580 [ 30.461472] ? inet6_csk_xmit+0x114/0x580 [ 30.465591] ? trace_hardirqs_off+0x10/0x10 [ 30.469889] ? lock_release+0xa40/0xa40 [ 30.473850] inet6_csk_xmit+0x2fc/0x580 [ 30.477798] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.482528] ? __sk_dst_check+0x1a5/0x380 [ 30.486651] ? sock_kfree_s+0x60/0x60 [ 30.490439] l2tp_xmit_skb+0x105f/0x1410 [ 30.494492] ? l2tp_session_create+0xb80/0xb80 [ 30.499050] ? sock_wmalloc+0x15d/0x1d0 [ 30.502999] ? iov_iter_advance+0x13f0/0x13f0 [ 30.507474] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.511769] pppol2tp_sendmsg+0x470/0x670 [ 30.515893] ? selinux_socket_sendmsg+0x36/0x40 [ 30.520533] ? pppol2tp_getsockopt+0x900/0x900 [ 30.525088] sock_sendmsg+0xca/0x110 [ 30.528777] ___sys_sendmsg+0x767/0x8b0 [ 30.532728] ? copy_msghdr_from_user+0x590/0x590 [ 30.537463] ? __pmd_alloc+0x4e0/0x4e0 [ 30.541323] ? selinux_socket_connect+0x311/0x730 [ 30.546140] ? trace_hardirqs_off+0x10/0x10 [ 30.550435] ? find_held_lock+0x35/0x1d0 [ 30.554475] ? __fget_light+0x2b2/0x3c0 [ 30.558425] ? fget_raw+0x20/0x20 [ 30.561865] ? __do_page_fault+0x5f7/0xc90 [ 30.566072] ? lock_downgrade+0x980/0x980 [ 30.570199] __sys_sendmsg+0xe5/0x210 [ 30.573969] ? __sys_sendmsg+0xe5/0x210 [ 30.577915] ? SyS_shutdown+0x290/0x290 [ 30.581868] ? __do_page_fault+0x3d6/0xc90 [ 30.586085] ? move_addr_to_kernel+0x60/0x60 [ 30.590480] SyS_sendmsg+0x2d/0x50 [ 30.593991] ? __sys_sendmsg+0x210/0x210 [ 30.598034] do_syscall_64+0x281/0x940 [ 30.601892] ? __do_page_fault+0xc90/0xc90 [ 30.606095] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.610590] ? finish_task_switch+0x1c1/0x7e0 [ 30.615066] ? syscall_return_slowpath+0x550/0x550 [ 30.619967] ? syscall_return_slowpath+0x2ac/0x550 [ 30.624874] ? prepare_exit_to_usermode+0x350/0x350 [ 30.629868] ? retint_user+0x18/0x18 [ 30.633558] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.638380] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.643539] RIP: 0033:0x441fc9 [ 30.646700] RSP: 002b:00000000007dfe98 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 30.654377] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441fc9 [ 30.661622] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 30.668862] RBP: 00000000004a3fe6 R08: 0000000000000000 R09: 0000000000000000 [ 30.676101] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000007dff70 [ 30.683341] R13: 0000000000403000 R14: 0000000000000000 R15: 0000000000000000 [ 30.690596] [ 30.692198] Allocated by task 0: [ 30.695530] (stack is not available) [ 30.699207] [ 30.700806] Freed by task 0: [ 30.703793] (stack is not available) [ 30.707473] [ 30.709071] The buggy address belongs to the object at ffff8801d6d78100 [ 30.709071] which belongs to the cache ip_dst_cache of size 168 [ 30.721783] The buggy address is located 24 bytes inside of [ 30.721783] 168-byte region [ffff8801d6d78100, ffff8801d6d781a8) [ 30.733539] The buggy address belongs to the page: [ 30.738437] page:ffffea00075b5e00 count:1 mapcount:0 mapping:ffff8801d6d78000 index:0x0 [ 30.746547] flags: 0x2fffc0000000100(slab) [ 30.750752] raw: 02fffc0000000100 ffff8801d6d78000 0000000000000000 0000000100000010 [ 30.758608] raw: ffff8801d5b8d948 ffff8801d5b8d948 ffff8801d6bee040 0000000000000000 [ 30.766461] page dumped because: kasan: bad access detected [ 30.772138] [ 30.773736] Memory state around the buggy address: [ 30.778635] ffff8801d6d78000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.785964] ffff8801d6d78080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.793293] >ffff8801d6d78100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.800619] ^ [ 30.804735] ffff8801d6d78180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.812064] ffff8801d6d78200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.819395] ================================================================== [ 30.826720] Disabling lock debugging due to kernel taint [ 30.832167] Kernel panic - not syncing: panic_on_warn set ... [ 30.832167] [ 30.839506] CPU: 0 PID: 4239 Comm: syzkaller310860 Tainted: G B 4.16.0-rc4+ #343 [ 30.848223] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.857543] Call Trace: [ 30.860102] dump_stack+0x194/0x24d [ 30.863700] ? arch_local_irq_restore+0x53/0x53 [ 30.868340] ? kasan_end_report+0x32/0x50 [ 30.872634] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.877357] ? vsnprintf+0x1ed/0x1900 [ 30.881131] ? ip6_xmit+0x1f30/0x2260 [ 30.884916] panic+0x1e4/0x41c [ 30.888077] ? refcount_error_report+0x214/0x214 [ 30.892803] ? add_taint+0x1c/0x50 [ 30.896312] ? add_taint+0x1c/0x50 [ 30.899819] ? ip6_xmit+0x1f76/0x2260 [ 30.903592] kasan_end_report+0x50/0x50 [ 30.907536] kasan_report+0x149/0x360 [ 30.911308] __asan_report_load8_noabort+0x14/0x20 [ 30.916207] ip6_xmit+0x1f76/0x2260 [ 30.919807] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.924696] ? fl6_update_dst+0x127/0x2b0 [ 30.928817] ? inet6_csk_route_socket+0x691/0xe80 [ 30.933631] ? trace_hardirqs_off+0x10/0x10 [ 30.937920] ? lock_acquire+0x1d5/0x580 [ 30.941861] ? lock_acquire+0x1d5/0x580 [ 30.945805] ? inet6_csk_xmit+0x114/0x580 [ 30.949924] ? trace_hardirqs_off+0x10/0x10 [ 30.954213] ? lock_release+0xa40/0xa40 [ 30.958165] inet6_csk_xmit+0x2fc/0x580 [ 30.962110] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.966833] ? __sk_dst_check+0x1a5/0x380 [ 30.970951] ? sock_kfree_s+0x60/0x60 [ 30.974732] l2tp_xmit_skb+0x105f/0x1410 [ 30.978768] ? l2tp_session_create+0xb80/0xb80 [ 30.983320] ? sock_wmalloc+0x15d/0x1d0 [ 30.987267] ? iov_iter_advance+0x13f0/0x13f0 [ 30.991734] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.996030] pppol2tp_sendmsg+0x470/0x670 [ 31.000154] ? selinux_socket_sendmsg+0x36/0x40 [ 31.004792] ? pppol2tp_getsockopt+0x900/0x900 [ 31.009342] sock_sendmsg+0xca/0x110 [ 31.013031] ___sys_sendmsg+0x767/0x8b0 [ 31.016976] ? copy_msghdr_from_user+0x590/0x590 [ 31.021702] ? __pmd_alloc+0x4e0/0x4e0 [ 31.025559] ? selinux_socket_connect+0x311/0x730 [ 31.030378] ? trace_hardirqs_off+0x10/0x10 [ 31.034669] ? find_held_lock+0x35/0x1d0 [ 31.038700] ? __fget_light+0x2b2/0x3c0 [ 31.042645] ? fget_raw+0x20/0x20 [ 31.046075] ? __do_page_fault+0x5f7/0xc90 [ 31.050280] ? lock_downgrade+0x980/0x980 [ 31.054401] __sys_sendmsg+0xe5/0x210 [ 31.058178] ? __sys_sendmsg+0xe5/0x210 [ 31.062124] ? SyS_shutdown+0x290/0x290 [ 31.066071] ? __do_page_fault+0x3d6/0xc90 [ 31.070280] ? move_addr_to_kernel+0x60/0x60 [ 31.074660] SyS_sendmsg+0x2d/0x50 [ 31.078169] ? __sys_sendmsg+0x210/0x210 [ 31.082199] do_syscall_64+0x281/0x940 [ 31.086053] ? __do_page_fault+0xc90/0xc90 [ 31.090256] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.094724] ? finish_task_switch+0x1c1/0x7e0 [ 31.099188] ? syscall_return_slowpath+0x550/0x550 [ 31.104095] ? syscall_return_slowpath+0x2ac/0x550 [ 31.108992] ? prepare_exit_to_usermode+0x350/0x350 [ 31.113980] ? retint_user+0x18/0x18 [ 31.117665] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.122478] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.127636] RIP: 0033:0x441fc9 [ 31.130794] RSP: 002b:00000000007dfe98 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 31.138470] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441fc9 [ 31.145710] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 31.152948] RBP: 00000000004a3fe6 R08: 0000000000000000 R09: 0000000000000000 [ 31.160185] R10: 0000000000000000 R11: 0000000000000217 R12: 00000000007dff70 [ 31.167422] R13: 0000000000403000 R14: 0000000000000000 R15: 0000000000000000 [ 31.175105] Dumping ftrace buffer: [ 31.178616] (ftrace buffer empty) [ 31.182293] Kernel Offset: disabled [ 31.185890] Rebooting in 86400 seconds..