[....] Starting enhanced syslogd: rsyslogd[ 17.266236] audit: type=1400 audit(1520604883.671:5): avc: denied { syslog } for pid=4074 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: [ 23.440610] audit: type=1400 audit(1520604889.846:6): avc: denied { map } for pid=4215 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 '10.128.0.38' (ECDSA) to the list of known hosts. [ 29.697697] audit: type=1400 audit(1520604896.103:7): avc: denied { map } for pid=4229 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 2018/03/09 14:14:56 parsed 1 programs 2018/03/09 14:14:56 executed programs: 0 [ 29.934507] audit: type=1400 audit(1520604896.340:8): avc: denied { map } for pid=4229 comm="syz-execprog" path="/root/syzkaller-shm415894941" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 29.944458] IPVS: ftp: loaded support on port[0] = 21 [ 30.211501] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 30.605238] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.611369] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.648864] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.685488] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.700618] ================================================================== [ 30.708059] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.714528] Read of size 8 at addr ffff8801c8674618 by task syz-executor0/4395 [ 30.721856] [ 30.723456] CPU: 0 PID: 4395 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #256 [ 30.730697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.740029] Call Trace: [ 30.742599] dump_stack+0x194/0x24d [ 30.746201] ? arch_local_irq_restore+0x53/0x53 [ 30.750843] ? show_regs_print_info+0x18/0x18 [ 30.755321] ? ip6_xmit+0x1f76/0x2260 [ 30.759096] print_address_description+0x73/0x250 [ 30.763916] ? ip6_xmit+0x1f76/0x2260 [ 30.767690] kasan_report+0x23c/0x360 [ 30.771470] __asan_report_load8_noabort+0x14/0x20 [ 30.776374] ip6_xmit+0x1f76/0x2260 [ 30.779989] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.784638] ? fl6_update_dst+0x127/0x2b0 [ 30.788777] ? inet6_csk_route_socket+0x691/0xe80 [ 30.793606] ? trace_hardirqs_off+0x10/0x10 [ 30.797903] ? lock_acquire+0x1d5/0x580 [ 30.801847] ? lock_acquire+0x1d5/0x580 [ 30.805795] ? inet6_csk_xmit+0x114/0x580 [ 30.809930] ? trace_hardirqs_off+0x10/0x10 [ 30.814242] ? lock_release+0xa40/0xa40 [ 30.818210] inet6_csk_xmit+0x2fc/0x580 [ 30.822166] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.826901] ? __sk_dst_check+0x1a5/0x380 [ 30.831043] ? sock_kfree_s+0x60/0x60 [ 30.834844] l2tp_xmit_skb+0x105f/0x1410 [ 30.838887] ? l2tp_session_create+0xb80/0xb80 [ 30.843441] ? sock_wmalloc+0x15d/0x1d0 [ 30.847394] ? iov_iter_advance+0x13f0/0x13f0 [ 30.851875] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.856182] pppol2tp_sendmsg+0x470/0x670 [ 30.860313] ? selinux_socket_sendmsg+0x36/0x40 [ 30.864965] ? pppol2tp_getsockopt+0x900/0x900 [ 30.869526] sock_sendmsg+0xca/0x110 [ 30.873213] ___sys_sendmsg+0x767/0x8b0 [ 30.877161] ? copy_msghdr_from_user+0x590/0x590 [ 30.881889] ? _raw_spin_unlock+0x22/0x30 [ 30.886013] ? __handle_mm_fault+0x5ba/0x38c0 [ 30.890484] ? __pmd_alloc+0x4e0/0x4e0 [ 30.894344] ? trace_hardirqs_off+0x10/0x10 [ 30.898642] ? release_sock+0x1d4/0x2a0 [ 30.902589] ? trace_hardirqs_on+0xd/0x10 [ 30.906713] ? __fget_light+0x2b2/0x3c0 [ 30.910658] ? fget_raw+0x20/0x20 [ 30.914102] ? find_held_lock+0x35/0x1d0 [ 30.918153] __sys_sendmsg+0xe5/0x210 [ 30.921926] ? __sys_sendmsg+0xe5/0x210 [ 30.925874] ? SyS_shutdown+0x290/0x290 [ 30.929827] ? compat_SyS_futex+0x288/0x380 [ 30.934139] compat_SyS_sendmsg+0x2a/0x40 [ 30.938258] ? compat_SyS_getsockopt+0x420/0x420 [ 30.942990] do_fast_syscall_32+0x3ec/0xf9f [ 30.947292] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.951855] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.956608] ? syscall_return_slowpath+0x2ac/0x550 [ 30.961524] ? prepare_exit_to_usermode+0x350/0x350 [ 30.966514] ? sysret32_from_system_call+0x5/0x3c [ 30.971340] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.976167] entry_SYSENTER_compat+0x70/0x7f [ 30.980545] RIP: 0023:0xf7feac99 [ 30.983882] RSP: 002b:00000000ff81a32c EFLAGS: 00000286 ORIG_RAX: 0000000000000172 [ 30.991560] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000002037ffc8 [ 30.998802] RDX: 0000000000000081 RSI: 0000000000000000 RDI: 0000000000000000 [ 31.006040] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.013281] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.020522] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.027782] [ 31.029385] Allocated by task 0: [ 31.032727] (stack is not available) [ 31.036413] [ 31.038014] Freed by task 0: [ 31.041001] (stack is not available) [ 31.044681] [ 31.046281] The buggy address belongs to the object at ffff8801c8674600 [ 31.046281] which belongs to the cache ip_dst_cache of size 168 [ 31.058992] The buggy address is located 24 bytes inside of [ 31.058992] 168-byte region [ffff8801c8674600, ffff8801c86746a8) [ 31.070754] The buggy address belongs to the page: [ 31.075661] page:ffffea0007219d00 count:1 mapcount:0 mapping:ffff8801c8674000 index:0x0 [ 31.083778] flags: 0x2fffc0000000100(slab) [ 31.087982] raw: 02fffc0000000100 ffff8801c8674000 0000000000000000 0000000100000010 [ 31.095842] raw: ffffea0006d7cb20 ffff8801d5baed48 ffff8801d9bec080 0000000000000000 [ 31.103691] page dumped because: kasan: bad access detected [ 31.109366] [ 31.110963] Memory state around the buggy address: [ 31.115862] ffff8801c8674500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.123190] ffff8801c8674580: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 31.130528] >ffff8801c8674600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.137854] ^ [ 31.141970] ffff8801c8674680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.149303] ffff8801c8674700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.156630] ================================================================== [ 31.163958] Disabling lock debugging due to kernel taint [ 31.169428] Kernel panic - not syncing: panic_on_warn set ... [ 31.169428] [ 31.176766] CPU: 0 PID: 4395 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #256 [ 31.185307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.194628] Call Trace: [ 31.197188] dump_stack+0x194/0x24d [ 31.200787] ? arch_local_irq_restore+0x53/0x53 [ 31.205425] ? kasan_end_report+0x32/0x50 [ 31.209542] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.214264] ? vsnprintf+0x1ed/0x1900 [ 31.218052] ? ip6_xmit+0x1f30/0x2260 [ 31.221832] panic+0x1e4/0x41c [ 31.224999] ? refcount_error_report+0x214/0x214 [ 31.229728] ? add_taint+0x1c/0x50 [ 31.233239] ? add_taint+0x1c/0x50 [ 31.236751] ? ip6_xmit+0x1f76/0x2260 [ 31.240522] kasan_end_report+0x50/0x50 [ 31.244469] kasan_report+0x149/0x360 [ 31.248241] __asan_report_load8_noabort+0x14/0x20 [ 31.253138] ip6_xmit+0x1f76/0x2260 [ 31.256740] ? ip6_finish_output2+0x23a0/0x23a0 [ 31.261378] ? fl6_update_dst+0x127/0x2b0 [ 31.265497] ? inet6_csk_route_socket+0x691/0xe80 [ 31.270309] ? trace_hardirqs_off+0x10/0x10 [ 31.274614] ? lock_acquire+0x1d5/0x580 [ 31.278573] ? lock_acquire+0x1d5/0x580 [ 31.282528] ? inet6_csk_xmit+0x114/0x580 [ 31.286645] ? trace_hardirqs_off+0x10/0x10 [ 31.290937] ? lock_release+0xa40/0xa40 [ 31.294889] inet6_csk_xmit+0x2fc/0x580 [ 31.298842] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.303574] ? __sk_dst_check+0x1a5/0x380 [ 31.307694] ? sock_kfree_s+0x60/0x60 [ 31.311478] l2tp_xmit_skb+0x105f/0x1410 [ 31.315515] ? l2tp_session_create+0xb80/0xb80 [ 31.320082] ? sock_wmalloc+0x15d/0x1d0 [ 31.324029] ? iov_iter_advance+0x13f0/0x13f0 [ 31.328497] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.332790] pppol2tp_sendmsg+0x470/0x670 [ 31.336909] ? selinux_socket_sendmsg+0x36/0x40 [ 31.341546] ? pppol2tp_getsockopt+0x900/0x900 [ 31.346096] sock_sendmsg+0xca/0x110 [ 31.349780] ___sys_sendmsg+0x767/0x8b0 [ 31.353725] ? copy_msghdr_from_user+0x590/0x590 [ 31.358453] ? _raw_spin_unlock+0x22/0x30 [ 31.362572] ? __handle_mm_fault+0x5ba/0x38c0 [ 31.367039] ? __pmd_alloc+0x4e0/0x4e0 [ 31.370894] ? trace_hardirqs_off+0x10/0x10 [ 31.375184] ? release_sock+0x1d4/0x2a0 [ 31.379127] ? trace_hardirqs_on+0xd/0x10 [ 31.383259] ? __fget_light+0x2b2/0x3c0 [ 31.387224] ? fget_raw+0x20/0x20 [ 31.390656] ? find_held_lock+0x35/0x1d0 [ 31.394694] __sys_sendmsg+0xe5/0x210 [ 31.398463] ? __sys_sendmsg+0xe5/0x210 [ 31.402406] ? SyS_shutdown+0x290/0x290 [ 31.406352] ? compat_SyS_futex+0x288/0x380 [ 31.410670] compat_SyS_sendmsg+0x2a/0x40 [ 31.414801] ? compat_SyS_getsockopt+0x420/0x420 [ 31.419528] do_fast_syscall_32+0x3ec/0xf9f [ 31.423824] ? do_int80_syscall_32+0x9c0/0x9c0 [ 31.428381] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.433108] ? syscall_return_slowpath+0x2ac/0x550 [ 31.438006] ? prepare_exit_to_usermode+0x350/0x350 [ 31.442993] ? sysret32_from_system_call+0x5/0x3c [ 31.447806] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.452622] entry_SYSENTER_compat+0x70/0x7f [ 31.456998] RIP: 0023:0xf7feac99 [ 31.460329] RSP: 002b:00000000ff81a32c EFLAGS: 00000286 ORIG_RAX: 0000000000000172 [ 31.468007] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000002037ffc8 [ 31.475244] RDX: 0000000000000081 RSI: 0000000000000000 RDI: 0000000000000000 [ 31.482486] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 31.489733] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.496973] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.504539] Dumping ftrace buffer: [ 31.508045] (ftrace buffer empty) [ 31.511723] Kernel Offset: disabled [ 31.515321] Rebooting in 86400 seconds..