[....] Starting enhanced syslogd: rsyslogd[ 17.425392] audit: type=1400 audit(1520381299.300:5): 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: [ 23.514392] audit: type=1400 audit(1520381305.389:6): avc: denied { map } for pid=4223 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 '10.128.0.34' (ECDSA) to the list of known hosts. [ 29.838792] audit: type=1400 audit(1520381311.713:7): avc: denied { map } for pid=4237 comm="syzkaller248290" path="/root/syzkaller248290414" 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 [ 29.850604] IPVS: ftp: loaded support on port[0] = 21 net.ipv6.conf.syz_tun.accept_dad = 0 net.ipv6.conf.syz_tun.router_solicitations = 0 [ 29.864794] audit: type=1400 audit(1520381311.713:8): avc: denied { sys_admin } for pid=4237 comm="syzkaller248290" 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 [ 29.897733] audit: type=1400 audit(1520381311.772:9): avc: denied { net_admin } for pid=4238 comm="syzkaller248290" 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 [ 30.108078] ip (4283) used greatest stack depth: 16312 bytes left [ 30.142876] 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 [ 30.504873] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.510993] 8021q: adding VLAN 0 to HW filter on device bond0 executing program [ 30.550167] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.590061] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.604392] audit: type=1400 audit(1520381312.479:10): avc: denied { sys_chroot } for pid=4238 comm="syzkaller248290" 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 [ 30.608800] ================================================================== [ 30.636405] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.642869] Read of size 8 at addr ffff8801aff89718 by task syzkaller248290/4238 [ 30.650369] [ 30.651972] CPU: 1 PID: 4238 Comm: syzkaller248290 Not tainted 4.16.0-rc4+ #254 [ 30.659384] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.668708] Call Trace: [ 30.671271] dump_stack+0x194/0x24d [ 30.674882] ? arch_local_irq_restore+0x53/0x53 [ 30.679525] ? show_regs_print_info+0x18/0x18 [ 30.683996] ? ip6_xmit+0x1f76/0x2260 [ 30.687771] print_address_description+0x73/0x250 [ 30.692586] ? ip6_xmit+0x1f76/0x2260 [ 30.696358] kasan_report+0x23c/0x360 [ 30.700148] __asan_report_load8_noabort+0x14/0x20 [ 30.705048] ip6_xmit+0x1f76/0x2260 [ 30.708662] ? ip6_finish_output2+0x23d0/0x23d0 [ 30.713304] ? fl6_update_dst+0x127/0x2b0 [ 30.717429] ? inet6_csk_route_socket+0x691/0xe80 [ 30.722245] ? trace_hardirqs_off+0x10/0x10 [ 30.726537] ? lock_acquire+0x1d5/0x580 [ 30.730484] ? lock_acquire+0x1d5/0x580 [ 30.734429] ? inet6_csk_xmit+0x114/0x580 [ 30.738553] ? trace_hardirqs_off+0x10/0x10 [ 30.742848] ? lock_release+0xa40/0xa40 [ 30.746811] inet6_csk_xmit+0x2fc/0x580 [ 30.750761] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.755491] ? __sk_dst_check+0x1a5/0x380 [ 30.759611] ? sock_kzfree_s+0x60/0x60 [ 30.763485] l2tp_xmit_skb+0x105f/0x1410 [ 30.767529] ? l2tp_session_create+0xb80/0xb80 [ 30.772082] ? sock_wmalloc+0x15d/0x1d0 [ 30.776035] ? iov_iter_advance+0x13f0/0x13f0 [ 30.780507] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.784803] pppol2tp_sendmsg+0x470/0x670 [ 30.788933] ? selinux_socket_sendmsg+0x36/0x40 [ 30.793575] ? pppol2tp_getsockopt+0x900/0x900 [ 30.798131] sock_sendmsg+0xca/0x110 [ 30.801816] ___sys_sendmsg+0x767/0x8b0 [ 30.805764] ? copy_msghdr_from_user+0x590/0x590 [ 30.810503] ? __pmd_alloc+0x4e0/0x4e0 [ 30.814361] ? selinux_socket_connect+0x311/0x730 [ 30.819180] ? trace_hardirqs_off+0x10/0x10 [ 30.823472] ? find_held_lock+0x35/0x1d0 [ 30.827507] ? __fget_light+0x2b2/0x3c0 [ 30.831452] ? fget_raw+0x20/0x20 [ 30.834893] ? __do_page_fault+0x5f7/0xc90 [ 30.839103] ? lock_downgrade+0x980/0x980 [ 30.843231] __sys_sendmsg+0xe5/0x210 [ 30.847005] ? __sys_sendmsg+0xe5/0x210 [ 30.850966] ? SyS_shutdown+0x290/0x290 [ 30.854930] ? __do_page_fault+0x3d6/0xc90 [ 30.859143] ? move_addr_to_kernel+0x60/0x60 [ 30.863530] SyS_sendmsg+0x2d/0x50 [ 30.867040] ? __sys_sendmsg+0x210/0x210 [ 30.871075] do_syscall_64+0x281/0x940 [ 30.874931] ? __do_page_fault+0xc90/0xc90 [ 30.879135] ? _raw_spin_unlock_irq+0x27/0x70 [ 30.883603] ? finish_task_switch+0x1c1/0x7e0 [ 30.888069] ? syscall_return_slowpath+0x550/0x550 [ 30.892976] ? syscall_return_slowpath+0x2ac/0x550 [ 30.897876] ? prepare_exit_to_usermode+0x350/0x350 [ 30.902865] ? retint_user+0x18/0x18 [ 30.906553] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.911380] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 30.916539] RIP: 0033:0x441ef9 [ 30.919698] RSP: 002b:00000000007dfea8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 30.927381] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ef9 [ 30.934622] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 30.941865] RBP: 00000000004a3f26 R08: 0000000120080522 R09: 0000000120080522 [ 30.949106] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000007dff70 [ 30.956344] R13: 0000000000402f30 R14: 0000000000000000 R15: 0000000000000000 [ 30.963597] [ 30.965196] Allocated by task 0: [ 30.968526] (stack is not available) [ 30.972205] [ 30.973800] Freed by task 0: [ 30.976785] (stack is not available) [ 30.980463] [ 30.982060] The buggy address belongs to the object at ffff8801aff89700 [ 30.982060] which belongs to the cache ip_dst_cache of size 160 [ 30.994781] The buggy address is located 24 bytes inside of [ 30.994781] 160-byte region [ffff8801aff89700, ffff8801aff897a0) [ 31.006536] The buggy address belongs to the page: [ 31.011436] page:ffffea0006bfe240 count:1 mapcount:0 mapping:ffff8801aff89000 index:0x0 [ 31.019548] flags: 0x2fffc0000000100(slab) [ 31.023752] raw: 02fffc0000000100 ffff8801aff89000 0000000000000000 0000000100000010 [ 31.031603] raw: ffff8801d5b67d48 ffff8801d5b67d48 ffff8801d5b66680 0000000000000000 [ 31.039451] page dumped because: kasan: bad access detected [ 31.045129] [ 31.046726] Memory state around the buggy address: [ 31.051624] ffff8801aff89600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.058954] ffff8801aff89680: 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc [ 31.066283] >ffff8801aff89700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.073609] ^ [ 31.077724] ffff8801aff89780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.085052] ffff8801aff89800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.092377] ================================================================== [ 31.099703] Disabling lock debugging due to kernel taint [ 31.105159] Kernel panic - not syncing: panic_on_warn set ... [ 31.105159] [ 31.112508] CPU: 1 PID: 4238 Comm: syzkaller248290 Tainted: G B 4.16.0-rc4+ #254 [ 31.121223] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.130547] Call Trace: [ 31.133106] dump_stack+0x194/0x24d [ 31.136705] ? arch_local_irq_restore+0x53/0x53 [ 31.141342] ? kasan_end_report+0x32/0x50 [ 31.145459] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.150187] ? vsnprintf+0x1ed/0x1900 [ 31.153958] ? ip6_xmit+0x1ec0/0x2260 [ 31.157726] panic+0x1e4/0x41c [ 31.160892] ? refcount_error_report+0x214/0x214 [ 31.165630] ? add_taint+0x1c/0x50 [ 31.169141] ? add_taint+0x1c/0x50 [ 31.172650] ? ip6_xmit+0x1f76/0x2260 [ 31.176419] kasan_end_report+0x50/0x50 [ 31.180362] kasan_report+0x149/0x360 [ 31.184134] __asan_report_load8_noabort+0x14/0x20 [ 31.189034] ip6_xmit+0x1f76/0x2260 [ 31.192636] ? ip6_finish_output2+0x23d0/0x23d0 [ 31.197274] ? fl6_update_dst+0x127/0x2b0 [ 31.201393] ? inet6_csk_route_socket+0x691/0xe80 [ 31.206206] ? trace_hardirqs_off+0x10/0x10 [ 31.210497] ? lock_acquire+0x1d5/0x580 [ 31.214441] ? lock_acquire+0x1d5/0x580 [ 31.218382] ? inet6_csk_xmit+0x114/0x580 [ 31.222499] ? trace_hardirqs_off+0x10/0x10 [ 31.226788] ? lock_release+0xa40/0xa40 [ 31.230739] inet6_csk_xmit+0x2fc/0x580 [ 31.234682] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.239410] ? __sk_dst_check+0x1a5/0x380 [ 31.243528] ? sock_kzfree_s+0x60/0x60 [ 31.247395] l2tp_xmit_skb+0x105f/0x1410 [ 31.251431] ? l2tp_session_create+0xb80/0xb80 [ 31.255981] ? sock_wmalloc+0x15d/0x1d0 [ 31.259926] ? iov_iter_advance+0x13f0/0x13f0 [ 31.264392] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.268684] pppol2tp_sendmsg+0x470/0x670 [ 31.272803] ? selinux_socket_sendmsg+0x36/0x40 [ 31.277440] ? pppol2tp_getsockopt+0x900/0x900 [ 31.282338] sock_sendmsg+0xca/0x110 [ 31.286025] ___sys_sendmsg+0x767/0x8b0 [ 31.289971] ? copy_msghdr_from_user+0x590/0x590 [ 31.294697] ? __pmd_alloc+0x4e0/0x4e0 [ 31.298555] ? selinux_socket_connect+0x311/0x730 [ 31.303370] ? trace_hardirqs_off+0x10/0x10 [ 31.307662] ? find_held_lock+0x35/0x1d0 [ 31.311696] ? __fget_light+0x2b2/0x3c0 [ 31.315638] ? fget_raw+0x20/0x20 [ 31.319066] ? __do_page_fault+0x5f7/0xc90 [ 31.323271] ? lock_downgrade+0x980/0x980 [ 31.327393] __sys_sendmsg+0xe5/0x210 [ 31.331161] ? __sys_sendmsg+0xe5/0x210 [ 31.335107] ? SyS_shutdown+0x290/0x290 [ 31.339055] ? __do_page_fault+0x3d6/0xc90 [ 31.343263] ? move_addr_to_kernel+0x60/0x60 [ 31.347650] SyS_sendmsg+0x2d/0x50 [ 31.351159] ? __sys_sendmsg+0x210/0x210 [ 31.355189] do_syscall_64+0x281/0x940 [ 31.359044] ? __do_page_fault+0xc90/0xc90 [ 31.363248] ? _raw_spin_unlock_irq+0x27/0x70 [ 31.367710] ? finish_task_switch+0x1c1/0x7e0 [ 31.372172] ? syscall_return_slowpath+0x550/0x550 [ 31.377069] ? syscall_return_slowpath+0x2ac/0x550 [ 31.381968] ? prepare_exit_to_usermode+0x350/0x350 [ 31.386955] ? retint_user+0x18/0x18 [ 31.390641] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.395453] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 31.400612] RIP: 0033:0x441ef9 [ 31.403779] RSP: 002b:00000000007dfea8 EFLAGS: 00000217 ORIG_RAX: 000000000000002e [ 31.411453] RAX: ffffffffffffffda RBX: 000000000000001a RCX: 0000000000441ef9 [ 31.418698] RDX: 0000000000000081 RSI: 000000002037ffc8 RDI: 0000000000000004 [ 31.425948] RBP: 00000000004a3f26 R08: 0000000120080522 R09: 0000000120080522 [ 31.433193] R10: 0000000120080522 R11: 0000000000000217 R12: 00000000007dff70 [ 31.440433] R13: 0000000000402f30 R14: 0000000000000000 R15: 0000000000000000 [ 31.448140] Dumping ftrace buffer: [ 31.451650] (ftrace buffer empty) [ 31.455504] Kernel Offset: disabled [ 31.459102] Rebooting in 86400 seconds..