[....] Starting enhanced syslogd: rsyslogd[ 16.682538] audit: type=1400 audit(1520835178.515:5): avc: denied { syslog } for pid=4092 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: [ 22.918979] audit: type=1400 audit(1520835184.751:6): avc: denied { map } for pid=4232 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 '10.128.0.53' (ECDSA) to the list of known hosts. [ 29.239319] audit: type=1400 audit(1520835191.072:7): avc: denied { map } for pid=4246 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 2018/03/12 06:13:11 parsed 1 programs 2018/03/12 06:13:11 executed programs: 0 [ 29.482353] audit: type=1400 audit(1520835191.315:8): avc: denied { map } for pid=4246 comm="syz-execprog" path="/root/syzkaller-shm730615138" 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 [ 29.496626] IPVS: ftp: loaded support on port[0] = 21 [ 29.754408] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 30.092315] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.098419] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.134660] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.173353] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.189359] ================================================================== [ 30.196779] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.203243] Read of size 8 at addr ffff8801ae94f818 by task syz-executor0/4412 [ 30.210577] [ 30.212178] CPU: 0 PID: 4412 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #260 [ 30.219436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.228763] Call Trace: [ 30.231324] dump_stack+0x194/0x24d [ 30.234924] ? arch_local_irq_restore+0x53/0x53 [ 30.239565] ? show_regs_print_info+0x18/0x18 [ 30.244052] ? ip6_xmit+0x1f76/0x2260 [ 30.247832] print_address_description+0x73/0x250 [ 30.252658] ? ip6_xmit+0x1f76/0x2260 [ 30.256433] kasan_report+0x23c/0x360 [ 30.260209] __asan_report_load8_noabort+0x14/0x20 [ 30.265110] ip6_xmit+0x1f76/0x2260 [ 30.268724] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.273368] ? fl6_update_dst+0x127/0x2b0 [ 30.277498] ? inet6_csk_route_socket+0x691/0xe80 [ 30.282317] ? trace_hardirqs_off+0x10/0x10 [ 30.286614] ? lock_acquire+0x1d5/0x580 [ 30.290561] ? lock_acquire+0x1d5/0x580 [ 30.294506] ? inet6_csk_xmit+0x114/0x580 [ 30.298628] ? trace_hardirqs_off+0x10/0x10 [ 30.302925] ? lock_release+0xa40/0xa40 [ 30.306905] inet6_csk_xmit+0x2fc/0x580 [ 30.310856] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.315583] ? __sk_dst_check+0x1a5/0x380 [ 30.319706] ? sock_kfree_s+0x60/0x60 [ 30.323494] l2tp_xmit_skb+0x105f/0x1410 [ 30.327540] ? l2tp_session_create+0xb80/0xb80 [ 30.332098] ? sock_wmalloc+0x15d/0x1d0 [ 30.336051] ? iov_iter_advance+0x13f0/0x13f0 [ 30.340525] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.344830] pppol2tp_sendmsg+0x470/0x670 [ 30.348957] ? selinux_socket_sendmsg+0x36/0x40 [ 30.353602] ? pppol2tp_getsockopt+0x900/0x900 [ 30.358158] sock_sendmsg+0xca/0x110 [ 30.361844] SYSC_sendto+0x361/0x5c0 [ 30.365534] ? SYSC_connect+0x4a0/0x4a0 [ 30.369483] ? find_held_lock+0x35/0x1d0 [ 30.373527] ? lock_downgrade+0x980/0x980 [ 30.377673] ? __do_page_fault+0x3d6/0xc90 [ 30.381880] ? compat_writev+0x420/0x420 [ 30.385920] SyS_sendto+0x40/0x50 [ 30.389350] ? SyS_getpeername+0x30/0x30 [ 30.393386] do_fast_syscall_32+0x3ec/0xf9f [ 30.397684] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.402240] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.406972] ? syscall_return_slowpath+0x2ac/0x550 [ 30.411872] ? prepare_exit_to_usermode+0x350/0x350 [ 30.416861] ? sysret32_from_system_call+0x5/0x3c [ 30.421714] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.426544] entry_SYSENTER_compat+0x70/0x7f [ 30.430924] RIP: 0023:0xf7f41c99 [ 30.434261] RSP: 002b:00000000ff9bdd3c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 30.441941] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.449185] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.456427] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.463666] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.470907] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.478162] [ 30.479764] Allocated by task 0: [ 30.483103] (stack is not available) [ 30.486781] [ 30.488378] Freed by task 0: [ 30.491364] (stack is not available) [ 30.495048] [ 30.496654] The buggy address belongs to the object at ffff8801ae94f800 [ 30.496654] which belongs to the cache ip_dst_cache of size 168 [ 30.509370] The buggy address is located 24 bytes inside of [ 30.509370] 168-byte region [ffff8801ae94f800, ffff8801ae94f8a8) [ 30.521125] The buggy address belongs to the page: [ 30.526031] page:ffffea0006ba53c0 count:1 mapcount:0 mapping:ffff8801ae94f000 index:0x0 [ 30.534144] flags: 0x2fffc0000000100(slab) [ 30.538351] raw: 02fffc0000000100 ffff8801ae94f000 0000000000000000 0000000100000010 [ 30.546201] raw: ffffea0006b923a0 ffff8801d5b5ec48 ffff8801d5439e00 0000000000000000 [ 30.554054] page dumped because: kasan: bad access detected [ 30.559731] [ 30.561327] Memory state around the buggy address: [ 30.566224] ffff8801ae94f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.573555] ffff8801ae94f780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.580882] >ffff8801ae94f800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.588209] ^ [ 30.592325] ffff8801ae94f880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.599656] ffff8801ae94f900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.606987] ================================================================== [ 30.614314] Disabling lock debugging due to kernel taint [ 30.619755] Kernel panic - not syncing: panic_on_warn set ... [ 30.619755] [ 30.627100] CPU: 0 PID: 4412 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #260 [ 30.635643] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.644967] Call Trace: [ 30.647525] dump_stack+0x194/0x24d [ 30.651123] ? arch_local_irq_restore+0x53/0x53 [ 30.655762] ? kasan_end_report+0x32/0x50 [ 30.659880] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.664606] ? vsnprintf+0x1ed/0x1900 [ 30.668379] ? ip6_xmit+0x1f30/0x2260 [ 30.672151] panic+0x1e4/0x41c [ 30.675317] ? refcount_error_report+0x214/0x214 [ 30.680044] ? add_taint+0x1c/0x50 [ 30.683554] ? add_taint+0x1c/0x50 [ 30.687067] ? ip6_xmit+0x1f76/0x2260 [ 30.690841] kasan_end_report+0x50/0x50 [ 30.694783] kasan_report+0x149/0x360 [ 30.698556] __asan_report_load8_noabort+0x14/0x20 [ 30.703455] ip6_xmit+0x1f76/0x2260 [ 30.707060] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.711702] ? fl6_update_dst+0x127/0x2b0 [ 30.715818] ? inet6_csk_route_socket+0x691/0xe80 [ 30.720630] ? trace_hardirqs_off+0x10/0x10 [ 30.724920] ? lock_acquire+0x1d5/0x580 [ 30.728865] ? lock_acquire+0x1d5/0x580 [ 30.732806] ? inet6_csk_xmit+0x114/0x580 [ 30.736926] ? trace_hardirqs_off+0x10/0x10 [ 30.741216] ? lock_release+0xa40/0xa40 [ 30.745174] inet6_csk_xmit+0x2fc/0x580 [ 30.749120] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.753850] ? __sk_dst_check+0x1a5/0x380 [ 30.757968] ? sock_kfree_s+0x60/0x60 [ 30.761748] l2tp_xmit_skb+0x105f/0x1410 [ 30.765787] ? l2tp_session_create+0xb80/0xb80 [ 30.770338] ? sock_wmalloc+0x15d/0x1d0 [ 30.774281] ? iov_iter_advance+0x13f0/0x13f0 [ 30.778749] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.783044] pppol2tp_sendmsg+0x470/0x670 [ 30.787164] ? selinux_socket_sendmsg+0x36/0x40 [ 30.791800] ? pppol2tp_getsockopt+0x900/0x900 [ 30.796353] sock_sendmsg+0xca/0x110 [ 30.800036] SYSC_sendto+0x361/0x5c0 [ 30.803723] ? SYSC_connect+0x4a0/0x4a0 [ 30.807670] ? find_held_lock+0x35/0x1d0 [ 30.811707] ? lock_downgrade+0x980/0x980 [ 30.815838] ? __do_page_fault+0x3d6/0xc90 [ 30.820044] ? compat_writev+0x420/0x420 [ 30.824080] SyS_sendto+0x40/0x50 [ 30.827508] ? SyS_getpeername+0x30/0x30 [ 30.831539] do_fast_syscall_32+0x3ec/0xf9f [ 30.835833] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.840383] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.845109] ? syscall_return_slowpath+0x2ac/0x550 [ 30.850013] ? prepare_exit_to_usermode+0x350/0x350 [ 30.855009] ? sysret32_from_system_call+0x5/0x3c [ 30.859831] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.864647] entry_SYSENTER_compat+0x70/0x7f [ 30.869029] RIP: 0023:0xf7f41c99 [ 30.872360] RSP: 002b:00000000ff9bdd3c EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 30.880035] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.887272] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.894512] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.901752] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.908992] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.916669] Dumping ftrace buffer: [ 30.920179] (ftrace buffer empty) [ 30.923863] Kernel Offset: disabled [ 30.927460] Rebooting in 86400 seconds..