[....] Starting enhanced syslogd: rsyslogd[ 15.781152] audit: type=1400 audit(1520805672.647:5): avc: denied { syslog } for pid=4075 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: [ 18.301642] audit: type=1400 audit(1520805675.167:6): avc: denied { map } for pid=4214 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 '10.128.0.15' (ECDSA) to the list of known hosts. [ 24.602411] audit: type=1400 audit(1520805681.468:7): avc: denied { map } for pid=4228 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 22:01:21 parsed 1 programs 2018/03/11 22:01:21 executed programs: 0 [ 24.855552] audit: type=1400 audit(1520805681.720:8): avc: denied { map } for pid=4228 comm="syz-execprog" path="/root/syzkaller-shm988893227" 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 [ 24.868263] IPVS: ftp: loaded support on port[0] = 21 [ 25.155645] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 25.533693] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 25.539813] 8021q: adding VLAN 0 to HW filter on device bond0 [ 25.580283] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 25.619306] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 25.647691] ================================================================== [ 25.655119] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 25.661585] Read of size 8 at addr ffff8801c56c3218 by task syz-executor0/4395 [ 25.668911] [ 25.670518] CPU: 1 PID: 4395 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #260 [ 25.677761] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.687086] Call Trace: [ 25.689647] dump_stack+0x194/0x24d [ 25.693258] ? arch_local_irq_restore+0x53/0x53 [ 25.697906] ? show_regs_print_info+0x18/0x18 [ 25.702389] ? ip6_xmit+0x1f76/0x2260 [ 25.706165] print_address_description+0x73/0x250 [ 25.710982] ? ip6_xmit+0x1f76/0x2260 [ 25.714756] kasan_report+0x23c/0x360 [ 25.718533] __asan_report_load8_noabort+0x14/0x20 [ 25.723433] ip6_xmit+0x1f76/0x2260 [ 25.727047] ? ip6_finish_output2+0x23a0/0x23a0 [ 25.731694] ? fl6_update_dst+0x127/0x2b0 [ 25.735821] ? inet6_csk_route_socket+0x691/0xe80 [ 25.740638] ? trace_hardirqs_off+0x10/0x10 [ 25.744933] ? lock_acquire+0x1d5/0x580 [ 25.748877] ? lock_acquire+0x1d5/0x580 [ 25.752831] ? inet6_csk_xmit+0x114/0x580 [ 25.756951] ? trace_hardirqs_off+0x10/0x10 [ 25.761247] ? lock_release+0xa40/0xa40 [ 25.765208] inet6_csk_xmit+0x2fc/0x580 [ 25.769155] ? inet6_csk_update_pmtu+0x160/0x160 [ 25.773884] ? __sk_dst_check+0x1a5/0x380 [ 25.778007] ? sock_kfree_s+0x60/0x60 [ 25.781807] l2tp_xmit_skb+0x105f/0x1410 [ 25.785852] ? l2tp_session_create+0xb80/0xb80 [ 25.790405] ? sock_wmalloc+0x15d/0x1d0 [ 25.794355] ? iov_iter_advance+0x13f0/0x13f0 [ 25.798835] ? pppol2tp_sendmsg+0x41b/0x670 [ 25.803134] pppol2tp_sendmsg+0x470/0x670 [ 25.807257] ? selinux_socket_sendmsg+0x36/0x40 [ 25.811911] ? pppol2tp_getsockopt+0x900/0x900 [ 25.816467] sock_sendmsg+0xca/0x110 [ 25.820159] SYSC_sendto+0x361/0x5c0 [ 25.823850] ? SYSC_connect+0x4a0/0x4a0 [ 25.827800] ? find_held_lock+0x35/0x1d0 [ 25.831845] ? lock_downgrade+0x980/0x980 [ 25.835990] ? __do_page_fault+0x3d6/0xc90 [ 25.840209] SyS_sendto+0x40/0x50 [ 25.843636] ? SyS_getpeername+0x30/0x30 [ 25.847673] do_fast_syscall_32+0x3ec/0xf9f [ 25.851974] ? do_int80_syscall_32+0x9c0/0x9c0 [ 25.856528] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 25.861261] ? syscall_return_slowpath+0x2ac/0x550 [ 25.866162] ? prepare_exit_to_usermode+0x350/0x350 [ 25.871152] ? sysret32_from_system_call+0x5/0x3c [ 25.875972] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 25.880793] entry_SYSENTER_compat+0x70/0x7f [ 25.885172] RIP: 0023:0xf7f8dc99 [ 25.888524] RSP: 002b:00000000ff9eb0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 25.896218] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 25.903464] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 25.910707] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 25.917959] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 25.925202] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.932462] [ 25.934066] Allocated by task 0: [ 25.937402] (stack is not available) [ 25.941085] [ 25.942688] Freed by task 0: [ 25.945684] (stack is not available) [ 25.949366] [ 25.950969] The buggy address belongs to the object at ffff8801c56c3200 [ 25.950969] which belongs to the cache ip_dst_cache of size 168 [ 25.963692] The buggy address is located 24 bytes inside of [ 25.963692] 168-byte region [ffff8801c56c3200, ffff8801c56c32a8) [ 25.975447] The buggy address belongs to the page: [ 25.980346] page:ffffea000715b0c0 count:1 mapcount:0 mapping:ffff8801c56c3000 index:0x0 [ 25.988462] flags: 0x2fffc0000000100(slab) [ 25.992669] raw: 02fffc0000000100 ffff8801c56c3000 0000000000000000 0000000100000010 [ 26.000521] raw: ffffea00072ce220 ffff8801d5bc6848 ffff8801d5bcb4c0 0000000000000000 [ 26.008372] page dumped because: kasan: bad access detected [ 26.014050] [ 26.015647] Memory state around the buggy address: [ 26.020548] ffff8801c56c3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.027879] ffff8801c56c3180: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 26.035211] >ffff8801c56c3200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.042539] ^ [ 26.046657] ffff8801c56c3280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.053987] ffff8801c56c3300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.061318] ================================================================== [ 26.068647] Disabling lock debugging due to kernel taint [ 26.074112] Kernel panic - not syncing: panic_on_warn set ... [ 26.074112] [ 26.081456] CPU: 1 PID: 4395 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #260 [ 26.090002] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.099332] Call Trace: [ 26.101895] dump_stack+0x194/0x24d [ 26.105499] ? arch_local_irq_restore+0x53/0x53 [ 26.110140] ? kasan_end_report+0x32/0x50 [ 26.114259] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.118985] ? vsnprintf+0x1ed/0x1900 [ 26.122757] ? ip6_xmit+0x1f30/0x2260 [ 26.126531] panic+0x1e4/0x41c [ 26.129693] ? refcount_error_report+0x214/0x214 [ 26.134420] ? add_taint+0x1c/0x50 [ 26.137930] ? add_taint+0x1c/0x50 [ 26.141442] ? ip6_xmit+0x1f76/0x2260 [ 26.145215] kasan_end_report+0x50/0x50 [ 26.149159] kasan_report+0x149/0x360 [ 26.152934] __asan_report_load8_noabort+0x14/0x20 [ 26.157834] ip6_xmit+0x1f76/0x2260 [ 26.161435] ? ip6_finish_output2+0x23a0/0x23a0 [ 26.166076] ? fl6_update_dst+0x127/0x2b0 [ 26.170199] ? inet6_csk_route_socket+0x691/0xe80 [ 26.175016] ? trace_hardirqs_off+0x10/0x10 [ 26.179310] ? lock_acquire+0x1d5/0x580 [ 26.183254] ? lock_acquire+0x1d5/0x580 [ 26.187195] ? inet6_csk_xmit+0x114/0x580 [ 26.191313] ? trace_hardirqs_off+0x10/0x10 [ 26.195605] ? lock_release+0xa40/0xa40 [ 26.199556] inet6_csk_xmit+0x2fc/0x580 [ 26.203503] ? inet6_csk_update_pmtu+0x160/0x160 [ 26.208230] ? __sk_dst_check+0x1a5/0x380 [ 26.212347] ? sock_kfree_s+0x60/0x60 [ 26.216464] l2tp_xmit_skb+0x105f/0x1410 [ 26.220504] ? l2tp_session_create+0xb80/0xb80 [ 26.225057] ? sock_wmalloc+0x15d/0x1d0 [ 26.229004] ? iov_iter_advance+0x13f0/0x13f0 [ 26.233478] ? pppol2tp_sendmsg+0x41b/0x670 [ 26.237770] pppol2tp_sendmsg+0x470/0x670 [ 26.241889] ? selinux_socket_sendmsg+0x36/0x40 [ 26.246527] ? pppol2tp_getsockopt+0x900/0x900 [ 26.251081] sock_sendmsg+0xca/0x110 [ 26.254766] SYSC_sendto+0x361/0x5c0 [ 26.258450] ? SYSC_connect+0x4a0/0x4a0 [ 26.262397] ? find_held_lock+0x35/0x1d0 [ 26.266432] ? lock_downgrade+0x980/0x980 [ 26.270565] ? __do_page_fault+0x3d6/0xc90 [ 26.274774] SyS_sendto+0x40/0x50 [ 26.278197] ? SyS_getpeername+0x30/0x30 [ 26.282229] do_fast_syscall_32+0x3ec/0xf9f [ 26.286522] ? do_int80_syscall_32+0x9c0/0x9c0 [ 26.291084] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 26.295814] ? syscall_return_slowpath+0x2ac/0x550 [ 26.300711] ? prepare_exit_to_usermode+0x350/0x350 [ 26.305699] ? sysret32_from_system_call+0x5/0x3c [ 26.310513] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 26.315326] entry_SYSENTER_compat+0x70/0x7f [ 26.319703] RIP: 0023:0xf7f8dc99 [ 26.323036] RSP: 002b:00000000ff9eb0ac EFLAGS: 00000282 ORIG_RAX: 0000000000000171 [ 26.330710] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 26.337949] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 26.345189] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 26.352428] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 26.359667] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.367339] Dumping ftrace buffer: [ 26.370846] (ftrace buffer empty) [ 26.374531] Kernel Offset: disabled [ 26.378129] Rebooting in 86400 seconds..