[....] Starting enhanced syslogd: rsyslogd[ 17.501838] audit: type=1400 audit(1520759234.566:5): avc: denied { syslog } for pid=4083 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: [ 22.806785] audit: type=1400 audit(1520759239.871:6): avc: denied { map } for pid=4225 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 '10.128.0.36' (ECDSA) to the list of known hosts. [ 29.073270] audit: type=1400 audit(1520759246.138:7): avc: denied { map } for pid=4239 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 2018/03/11 09:07:26 parsed 1 programs 2018/03/11 09:07:26 executed programs: 0 [ 29.327773] audit: type=1400 audit(1520759246.392:8): avc: denied { map } for pid=4239 comm="syz-execprog" path="/root/syzkaller-shm759159407" 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 [ 29.344119] IPVS: ftp: loaded support on port[0] = 21 [ 29.606540] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 29.960301] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 29.966407] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.004621] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.042145] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.058777] ================================================================== [ 30.066212] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.072716] Read of size 8 at addr ffff8801af4fe518 by task syz-executor0/4405 [ 30.080047] [ 30.081650] CPU: 1 PID: 4405 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #259 [ 30.088893] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.098219] Call Trace: [ 30.100788] dump_stack+0x194/0x24d [ 30.104392] ? arch_local_irq_restore+0x53/0x53 [ 30.109041] ? show_regs_print_info+0x18/0x18 [ 30.113518] ? ip6_xmit+0x1f76/0x2260 [ 30.117297] print_address_description+0x73/0x250 [ 30.122112] ? ip6_xmit+0x1f76/0x2260 [ 30.125887] kasan_report+0x23c/0x360 [ 30.130053] __asan_report_load8_noabort+0x14/0x20 [ 30.134959] ip6_xmit+0x1f76/0x2260 [ 30.138572] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.143220] ? fl6_update_dst+0x127/0x2b0 [ 30.147348] ? inet6_csk_route_socket+0x691/0xe80 [ 30.152167] ? trace_hardirqs_off+0x10/0x10 [ 30.156469] ? lock_acquire+0x1d5/0x580 [ 30.160417] ? lock_acquire+0x1d5/0x580 [ 30.164365] ? inet6_csk_xmit+0x114/0x580 [ 30.168489] ? trace_hardirqs_off+0x10/0x10 [ 30.172796] ? lock_release+0xa40/0xa40 [ 30.176762] inet6_csk_xmit+0x2fc/0x580 [ 30.180713] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.185446] ? __sk_dst_check+0x1a5/0x380 [ 30.189569] ? sock_kfree_s+0x60/0x60 [ 30.193378] l2tp_xmit_skb+0x105f/0x1410 [ 30.197429] ? l2tp_session_create+0xb80/0xb80 [ 30.201987] ? sock_wmalloc+0x15d/0x1d0 [ 30.205939] ? iov_iter_advance+0x13f0/0x13f0 [ 30.210411] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.214709] pppol2tp_sendmsg+0x470/0x670 [ 30.218835] ? selinux_socket_sendmsg+0x36/0x40 [ 30.223480] ? pppol2tp_getsockopt+0x900/0x900 [ 30.228047] sock_sendmsg+0xca/0x110 [ 30.231738] SYSC_sendto+0x361/0x5c0 [ 30.235430] ? SYSC_connect+0x4a0/0x4a0 [ 30.239383] ? find_held_lock+0x35/0x1d0 [ 30.243429] ? lock_downgrade+0x980/0x980 [ 30.247584] ? __do_page_fault+0x3d6/0xc90 [ 30.251803] SyS_sendto+0x40/0x50 [ 30.255245] ? SyS_getpeername+0x30/0x30 [ 30.259292] do_fast_syscall_32+0x3ec/0xf9f [ 30.263593] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.268151] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.272886] ? syscall_return_slowpath+0x2ac/0x550 [ 30.277790] ? prepare_exit_to_usermode+0x350/0x350 [ 30.282783] ? sysret32_from_system_call+0x5/0x3c [ 30.287613] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.292460] entry_SYSENTER_compat+0x70/0x7f [ 30.296857] RIP: 0023:0xf7f3fc99 [ 30.300195] RSP: 002b:00000000fff674dc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 30.307876] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.315119] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.322363] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.329622] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.336866] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.344146] [ 30.345752] Allocated by task 0: [ 30.349089] (stack is not available) [ 30.352776] [ 30.354384] Freed by task 0: [ 30.357372] (stack is not available) [ 30.361056] [ 30.362658] The buggy address belongs to the object at ffff8801af4fe500 [ 30.362658] which belongs to the cache ip_dst_cache of size 168 [ 30.375371] The buggy address is located 24 bytes inside of [ 30.375371] 168-byte region [ffff8801af4fe500, ffff8801af4fe5a8) [ 30.387133] The buggy address belongs to the page: [ 30.392040] page:ffffea0006bd3f80 count:1 mapcount:0 mapping:ffff8801af4fe000 index:0xffff8801af4fe000 [ 30.401459] flags: 0x2fffc0000000100(slab) [ 30.405669] raw: 02fffc0000000100 ffff8801af4fe000 ffff8801af4fe000 000000010000000d [ 30.413524] raw: ffff8801d5bedf38 ffff8801d5bedf38 ffff8801d5be5800 0000000000000000 [ 30.421373] page dumped because: kasan: bad access detected [ 30.427056] [ 30.428662] Memory state around the buggy address: [ 30.433582] ffff8801af4fe400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.440912] ffff8801af4fe480: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.448255] >ffff8801af4fe500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.455585] ^ [ 30.459721] ffff8801af4fe580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.467057] ffff8801af4fe600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.474387] ================================================================== [ 30.481721] Disabling lock debugging due to kernel taint [ 30.487182] Kernel panic - not syncing: panic_on_warn set ... [ 30.487182] [ 30.494533] CPU: 1 PID: 4405 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #259 [ 30.503080] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.512407] Call Trace: [ 30.514976] dump_stack+0x194/0x24d [ 30.518578] ? arch_local_irq_restore+0x53/0x53 [ 30.523222] ? kasan_end_report+0x32/0x50 [ 30.527347] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.532073] ? vsnprintf+0x1ed/0x1900 [ 30.535858] ? ip6_xmit+0x1f30/0x2260 [ 30.539633] panic+0x1e4/0x41c [ 30.542797] ? refcount_error_report+0x214/0x214 [ 30.547527] ? add_taint+0x1c/0x50 [ 30.551041] ? add_taint+0x1c/0x50 [ 30.554563] ? ip6_xmit+0x1f76/0x2260 [ 30.558337] kasan_end_report+0x50/0x50 [ 30.562290] kasan_report+0x149/0x360 [ 30.566073] __asan_report_load8_noabort+0x14/0x20 [ 30.570971] ip6_xmit+0x1f76/0x2260 [ 30.574576] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.579219] ? fl6_update_dst+0x127/0x2b0 [ 30.583338] ? inet6_csk_route_socket+0x691/0xe80 [ 30.588155] ? trace_hardirqs_off+0x10/0x10 [ 30.592445] ? lock_acquire+0x1d5/0x580 [ 30.596389] ? lock_acquire+0x1d5/0x580 [ 30.600333] ? inet6_csk_xmit+0x114/0x580 [ 30.604454] ? trace_hardirqs_off+0x10/0x10 [ 30.608748] ? lock_release+0xa40/0xa40 [ 30.612701] inet6_csk_xmit+0x2fc/0x580 [ 30.616655] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.621382] ? __sk_dst_check+0x1a5/0x380 [ 30.625502] ? sock_kfree_s+0x60/0x60 [ 30.629284] l2tp_xmit_skb+0x105f/0x1410 [ 30.633321] ? l2tp_session_create+0xb80/0xb80 [ 30.637875] ? sock_wmalloc+0x15d/0x1d0 [ 30.641823] ? iov_iter_advance+0x13f0/0x13f0 [ 30.646290] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.650581] pppol2tp_sendmsg+0x470/0x670 [ 30.654703] ? selinux_socket_sendmsg+0x36/0x40 [ 30.659353] ? pppol2tp_getsockopt+0x900/0x900 [ 30.663907] sock_sendmsg+0xca/0x110 [ 30.667589] SYSC_sendto+0x361/0x5c0 [ 30.671283] ? SYSC_connect+0x4a0/0x4a0 [ 30.675241] ? find_held_lock+0x35/0x1d0 [ 30.679287] ? lock_downgrade+0x980/0x980 [ 30.683422] ? __do_page_fault+0x3d6/0xc90 [ 30.687632] SyS_sendto+0x40/0x50 [ 30.691058] ? SyS_getpeername+0x30/0x30 [ 30.695091] do_fast_syscall_32+0x3ec/0xf9f [ 30.699386] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.703941] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.708679] ? syscall_return_slowpath+0x2ac/0x550 [ 30.713578] ? prepare_exit_to_usermode+0x350/0x350 [ 30.718566] ? sysret32_from_system_call+0x5/0x3c [ 30.723381] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.728201] entry_SYSENTER_compat+0x70/0x7f [ 30.732582] RIP: 0023:0xf7f3fc99 [ 30.735920] RSP: 002b:00000000fff674dc EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 30.743597] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.750839] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.758090] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.765330] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.772570] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.780276] Dumping ftrace buffer: [ 30.783800] (ftrace buffer empty) [ 30.787481] Kernel Offset: disabled [ 30.791081] Rebooting in 86400 seconds..