[....] Starting enhanced syslogd: rsyslogd[ 17.481379] audit: type=1400 audit(1520725038.832:5): avc: denied { syslog } for pid=4080 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: [ 23.053123] audit: type=1400 audit(1520725044.403:6): avc: denied { map } for pid=4219 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 '10.128.0.41' (ECDSA) to the list of known hosts. [ 29.347621] audit: type=1400 audit(1520725050.698:7): avc: denied { map } for pid=4233 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/03/10 23:37:30 parsed 1 programs 2018/03/10 23:37:30 executed programs: 0 [ 29.586780] audit: type=1400 audit(1520725050.937:8): avc: denied { map } for pid=4233 comm="syz-execprog" path="/root/syzkaller-shm051157765" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 29.598626] IPVS: ftp: loaded support on port[0] = 21 [ 29.612394] audit: type=1400 audit(1520725050.944:9): avc: denied { sys_admin } for pid=4238 comm="syz-executor0" 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 [ 29.641874] audit: type=1400 audit(1520725050.987:10): avc: denied { net_admin } for pid=4241 comm="syz-executor0" 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 [ 29.875554] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 30.242805] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.248916] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.287432] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.326914] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.338454] audit: type=1400 audit(1520725051.689:11): avc: denied { sys_chroot } for pid=4241 comm="syz-executor0" 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 [ 30.348807] ================================================================== [ 30.370373] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.376837] Read of size 8 at addr ffff8801b80ee418 by task syz-executor0/4399 [ 30.384165] [ 30.385768] CPU: 1 PID: 4399 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #259 [ 30.393019] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.402350] Call Trace: [ 30.404912] dump_stack+0x194/0x24d [ 30.408512] ? arch_local_irq_restore+0x53/0x53 [ 30.413151] ? show_regs_print_info+0x18/0x18 [ 30.417802] ? ip6_xmit+0x1f76/0x2260 [ 30.421580] print_address_description+0x73/0x250 [ 30.426408] ? ip6_xmit+0x1f76/0x2260 [ 30.430184] kasan_report+0x23c/0x360 [ 30.433966] __asan_report_load8_noabort+0x14/0x20 [ 30.438866] ip6_xmit+0x1f76/0x2260 [ 30.442480] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.447126] ? fl6_update_dst+0x127/0x2b0 [ 30.451250] ? inet6_csk_route_socket+0x691/0xe80 [ 30.456066] ? trace_hardirqs_off+0x10/0x10 [ 30.460361] ? lock_acquire+0x1d5/0x580 [ 30.464304] ? lock_acquire+0x1d5/0x580 [ 30.468248] ? inet6_csk_xmit+0x114/0x580 [ 30.472366] ? trace_hardirqs_off+0x10/0x10 [ 30.476660] ? lock_release+0xa40/0xa40 [ 30.480621] inet6_csk_xmit+0x2fc/0x580 [ 30.484564] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.489292] ? __sk_dst_check+0x1a5/0x380 [ 30.493416] ? sock_kfree_s+0x60/0x60 [ 30.497204] l2tp_xmit_skb+0x105f/0x1410 [ 30.501248] ? l2tp_session_create+0xb80/0xb80 [ 30.505805] ? sock_wmalloc+0x15d/0x1d0 [ 30.509755] ? iov_iter_advance+0x13f0/0x13f0 [ 30.514228] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.518537] pppol2tp_sendmsg+0x470/0x670 [ 30.522660] ? selinux_socket_sendmsg+0x36/0x40 [ 30.527302] ? pppol2tp_getsockopt+0x900/0x900 [ 30.531867] sock_sendmsg+0xca/0x110 [ 30.535557] SYSC_sendto+0x361/0x5c0 [ 30.539245] ? SYSC_connect+0x4a0/0x4a0 [ 30.543199] ? find_held_lock+0x35/0x1d0 [ 30.547244] ? lock_downgrade+0x980/0x980 [ 30.551477] ? __do_page_fault+0x3d6/0xc90 [ 30.555706] SyS_sendto+0x40/0x50 [ 30.559130] ? SyS_getpeername+0x30/0x30 [ 30.563167] do_fast_syscall_32+0x3ec/0xf9f [ 30.567468] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.572026] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.576766] ? syscall_return_slowpath+0x2ac/0x550 [ 30.581674] ? prepare_exit_to_usermode+0x350/0x350 [ 30.586669] ? sysret32_from_system_call+0x5/0x3c [ 30.591488] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.596321] entry_SYSENTER_compat+0x70/0x7f [ 30.600706] RIP: 0023:0xf7fb7c99 [ 30.604048] RSP: 002b:000000000844e9cc EFLAGS: 00000202 ORIG_RAX: 0000000000000171 [ 30.611728] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.618969] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.626216] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.633458] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.640703] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.647970] [ 30.649572] Allocated by task 0: [ 30.652909] (stack is not available) [ 30.656590] [ 30.658189] Freed by task 0: [ 30.661176] (stack is not available) [ 30.664860] [ 30.666460] The buggy address belongs to the object at ffff8801b80ee400 [ 30.666460] which belongs to the cache ip_dst_cache of size 168 [ 30.679266] The buggy address is located 24 bytes inside of [ 30.679266] 168-byte region [ffff8801b80ee400, ffff8801b80ee4a8) [ 30.691025] The buggy address belongs to the page: [ 30.695928] page:ffffea0006e03b80 count:1 mapcount:0 mapping:ffff8801b80ee000 index:0xffff8801b80ee600 [ 30.705349] flags: 0x2fffc0000000100(slab) [ 30.709562] raw: 02fffc0000000100 ffff8801b80ee000 ffff8801b80ee600 000000010000000d [ 30.717414] raw: ffff8801d6be0538 ffffea0006c3e0a0 ffff8801d5bf1b00 0000000000000000 [ 30.725265] page dumped because: kasan: bad access detected [ 30.730944] [ 30.732541] Memory state around the buggy address: [ 30.737440] ffff8801b80ee300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.744772] ffff8801b80ee380: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.752104] >ffff8801b80ee400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.759434] ^ [ 30.763565] ffff8801b80ee480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.770896] ffff8801b80ee500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.778222] ================================================================== [ 30.785558] Disabling lock debugging due to kernel taint [ 30.791021] Kernel panic - not syncing: panic_on_warn set ... [ 30.791021] [ 30.798362] CPU: 1 PID: 4399 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #259 [ 30.806916] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.816241] Call Trace: [ 30.818799] dump_stack+0x194/0x24d [ 30.822397] ? arch_local_irq_restore+0x53/0x53 [ 30.827037] ? kasan_end_report+0x32/0x50 [ 30.831169] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.835895] ? vsnprintf+0x1ed/0x1900 [ 30.839666] ? ip6_xmit+0x1f30/0x2260 [ 30.843436] panic+0x1e4/0x41c [ 30.846600] ? refcount_error_report+0x214/0x214 [ 30.851331] ? add_taint+0x1c/0x50 [ 30.855296] ? add_taint+0x1c/0x50 [ 30.858808] ? ip6_xmit+0x1f76/0x2260 [ 30.862577] kasan_end_report+0x50/0x50 [ 30.866527] kasan_report+0x149/0x360 [ 30.870303] __asan_report_load8_noabort+0x14/0x20 [ 30.875201] ip6_xmit+0x1f76/0x2260 [ 30.878804] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.883445] ? fl6_update_dst+0x127/0x2b0 [ 30.887565] ? inet6_csk_route_socket+0x691/0xe80 [ 30.892379] ? trace_hardirqs_off+0x10/0x10 [ 30.896669] ? lock_acquire+0x1d5/0x580 [ 30.900609] ? lock_acquire+0x1d5/0x580 [ 30.904562] ? inet6_csk_xmit+0x114/0x580 [ 30.908692] ? trace_hardirqs_off+0x10/0x10 [ 30.912985] ? lock_release+0xa40/0xa40 [ 30.916939] inet6_csk_xmit+0x2fc/0x580 [ 30.920882] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.925608] ? __sk_dst_check+0x1a5/0x380 [ 30.929726] ? sock_kfree_s+0x60/0x60 [ 30.933506] l2tp_xmit_skb+0x105f/0x1410 [ 30.937544] ? l2tp_session_create+0xb80/0xb80 [ 30.942101] ? sock_wmalloc+0x15d/0x1d0 [ 30.946046] ? iov_iter_advance+0x13f0/0x13f0 [ 30.950515] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.954810] pppol2tp_sendmsg+0x470/0x670 [ 30.958932] ? selinux_socket_sendmsg+0x36/0x40 [ 30.963576] ? pppol2tp_getsockopt+0x900/0x900 [ 30.968139] sock_sendmsg+0xca/0x110 [ 30.971827] SYSC_sendto+0x361/0x5c0 [ 30.975522] ? SYSC_connect+0x4a0/0x4a0 [ 30.979473] ? find_held_lock+0x35/0x1d0 [ 30.983510] ? lock_downgrade+0x980/0x980 [ 30.987649] ? __do_page_fault+0x3d6/0xc90 [ 30.991867] SyS_sendto+0x40/0x50 [ 30.995296] ? SyS_getpeername+0x30/0x30 [ 30.999328] do_fast_syscall_32+0x3ec/0xf9f [ 31.003623] ? do_int80_syscall_32+0x9c0/0x9c0 [ 31.008174] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.012903] ? syscall_return_slowpath+0x2ac/0x550 [ 31.017803] ? prepare_exit_to_usermode+0x350/0x350 [ 31.022790] ? sysret32_from_system_call+0x5/0x3c [ 31.027605] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.032427] entry_SYSENTER_compat+0x70/0x7f [ 31.036806] RIP: 0023:0xf7fb7c99 [ 31.040139] RSP: 002b:000000000844e9cc EFLAGS: 00000202 ORIG_RAX: 0000000000000171 [ 31.047817] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 31.055058] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 31.062298] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 31.069539] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.076788] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.084513] Dumping ftrace buffer: [ 31.088034] (ftrace buffer empty) [ 31.091716] Kernel Offset: disabled [ 31.095319] Rebooting in 86400 seconds..