[....] Starting enhanced syslogd: rsyslogd[ 17.146000] audit: type=1400 audit(1520771885.907:5): avc: denied { syslog } for pid=4099 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: [ 23.173426] audit: type=1400 audit(1520771891.935:6): avc: denied { map } for pid=4240 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 '10.128.0.22' (ECDSA) to the list of known hosts. [ 29.518401] audit: type=1400 audit(1520771898.280:7): avc: denied { map } for pid=4254 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 12:38:18 parsed 1 programs 2018/03/11 12:38:18 executed programs: 0 [ 29.746486] audit: type=1400 audit(1520771898.508:8): avc: denied { map } for pid=4254 comm="syz-execprog" path="/root/syzkaller-shm124967107" 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 [ 29.757567] IPVS: ftp: loaded support on port[0] = 21 [ 29.772092] audit: type=1400 audit(1520771898.515:9): avc: denied { sys_admin } for pid=4259 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 [ 29.801458] audit: type=1400 audit(1520771898.556:10): avc: denied { net_admin } for pid=4262 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 [ 30.012203] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 30.345912] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 30.352030] 8021q: adding VLAN 0 to HW filter on device bond0 [ 30.387099] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 30.423576] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 30.437348] audit: type=1400 audit(1520771899.199:11): avc: denied { sys_chroot } for pid=4262 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 [ 30.445715] ================================================================== [ 30.469106] BUG: KASAN: slab-out-of-bounds in ip6_xmit+0x1f76/0x2260 [ 30.475572] Read of size 8 at addr ffff8801cabe3118 by task syz-executor0/4420 [ 30.482900] [ 30.484501] CPU: 1 PID: 4420 Comm: syz-executor0 Not tainted 4.16.0-rc4+ #259 [ 30.491744] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.501066] Call Trace: [ 30.503628] dump_stack+0x194/0x24d [ 30.507226] ? arch_local_irq_restore+0x53/0x53 [ 30.511866] ? show_regs_print_info+0x18/0x18 [ 30.516339] ? ip6_xmit+0x1f76/0x2260 [ 30.520114] print_address_description+0x73/0x250 [ 30.524927] ? ip6_xmit+0x1f76/0x2260 [ 30.528698] kasan_report+0x23c/0x360 [ 30.532477] __asan_report_load8_noabort+0x14/0x20 [ 30.537376] ip6_xmit+0x1f76/0x2260 [ 30.540985] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.545627] ? fl6_update_dst+0x127/0x2b0 [ 30.549748] ? inet6_csk_route_socket+0x691/0xe80 [ 30.554563] ? trace_hardirqs_off+0x10/0x10 [ 30.558855] ? lock_acquire+0x1d5/0x580 [ 30.562799] ? lock_acquire+0x1d5/0x580 [ 30.566746] ? inet6_csk_xmit+0x114/0x580 [ 30.570863] ? trace_hardirqs_off+0x10/0x10 [ 30.575157] ? lock_release+0xa40/0xa40 [ 30.579116] inet6_csk_xmit+0x2fc/0x580 [ 30.583063] ? inet6_csk_update_pmtu+0x160/0x160 [ 30.587789] ? __sk_dst_check+0x1a5/0x380 [ 30.591996] ? sock_kfree_s+0x60/0x60 [ 30.595783] l2tp_xmit_skb+0x105f/0x1410 [ 30.599822] ? l2tp_session_create+0xb80/0xb80 [ 30.604373] ? sock_wmalloc+0x15d/0x1d0 [ 30.608319] ? iov_iter_advance+0x13f0/0x13f0 [ 30.612788] ? pppol2tp_sendmsg+0x41b/0x670 [ 30.617082] pppol2tp_sendmsg+0x470/0x670 [ 30.621203] ? selinux_socket_sendmsg+0x36/0x40 [ 30.625840] ? pppol2tp_getsockopt+0x900/0x900 [ 30.630392] sock_sendmsg+0xca/0x110 [ 30.634077] SYSC_sendto+0x361/0x5c0 [ 30.637761] ? SYSC_connect+0x4a0/0x4a0 [ 30.641708] ? find_held_lock+0x35/0x1d0 [ 30.645747] ? lock_downgrade+0x980/0x980 [ 30.649888] ? __do_page_fault+0x3d6/0xc90 [ 30.654089] ? compat_writev+0x420/0x420 [ 30.658124] SyS_sendto+0x40/0x50 [ 30.661548] ? SyS_getpeername+0x30/0x30 [ 30.665583] do_fast_syscall_32+0x3ec/0xf9f [ 30.669879] ? do_int80_syscall_32+0x9c0/0x9c0 [ 30.674429] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.679158] ? syscall_return_slowpath+0x2ac/0x550 [ 30.684057] ? prepare_exit_to_usermode+0x350/0x350 [ 30.689045] ? sysret32_from_system_call+0x5/0x3c [ 30.693860] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.698676] entry_SYSENTER_compat+0x70/0x7f [ 30.703052] RIP: 0023:0xf7f77c99 [ 30.706386] RSP: 002b:000000000844e9cc EFLAGS: 00000202 ORIG_RAX: 0000000000000171 [ 30.714063] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 30.721305] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 30.728543] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 30.735780] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 30.743020] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 30.750275] [ 30.751874] Allocated by task 0: [ 30.755203] (stack is not available) [ 30.758879] [ 30.760478] Freed by task 0: [ 30.763465] (stack is not available) [ 30.767143] [ 30.768742] The buggy address belongs to the object at ffff8801cabe3100 [ 30.768742] which belongs to the cache ip_dst_cache of size 168 [ 30.781454] The buggy address is located 24 bytes inside of [ 30.781454] 168-byte region [ffff8801cabe3100, ffff8801cabe31a8) [ 30.793208] The buggy address belongs to the page: [ 30.798106] page:ffffea00072af8c0 count:1 mapcount:0 mapping:ffff8801cabe3000 index:0x0 [ 30.806218] flags: 0x2fffc0000000100(slab) [ 30.810422] raw: 02fffc0000000100 ffff8801cabe3000 0000000000000000 0000000100000010 [ 30.818272] raw: ffffea0006db7d20 ffff8801d5bb9c48 ffff8801d5bb8980 0000000000000000 [ 30.826118] page dumped because: kasan: bad access detected [ 30.831791] [ 30.833386] Memory state around the buggy address: [ 30.838286] ffff8801cabe3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.845611] ffff8801cabe3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 30.852958] >ffff8801cabe3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.860285] ^ [ 30.864397] ffff8801cabe3180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.871725] ffff8801cabe3200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.879047] ================================================================== [ 30.886370] Disabling lock debugging due to kernel taint [ 30.891829] Kernel panic - not syncing: panic_on_warn set ... [ 30.891829] [ 30.899159] CPU: 1 PID: 4420 Comm: syz-executor0 Tainted: G B 4.16.0-rc4+ #259 [ 30.907697] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.917017] Call Trace: [ 30.919574] dump_stack+0x194/0x24d [ 30.923170] ? arch_local_irq_restore+0x53/0x53 [ 30.927807] ? kasan_end_report+0x32/0x50 [ 30.931924] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.936647] ? vsnprintf+0x1ed/0x1900 [ 30.940416] ? ip6_xmit+0x1f30/0x2260 [ 30.944184] panic+0x1e4/0x41c [ 30.947343] ? refcount_error_report+0x214/0x214 [ 30.952066] ? add_taint+0x1c/0x50 [ 30.955571] ? add_taint+0x1c/0x50 [ 30.959080] ? ip6_xmit+0x1f76/0x2260 [ 30.962847] kasan_end_report+0x50/0x50 [ 30.966789] kasan_report+0x149/0x360 [ 30.970557] __asan_report_load8_noabort+0x14/0x20 [ 30.975455] ip6_xmit+0x1f76/0x2260 [ 30.979058] ? ip6_finish_output2+0x23a0/0x23a0 [ 30.983695] ? fl6_update_dst+0x127/0x2b0 [ 30.987810] ? inet6_csk_route_socket+0x691/0xe80 [ 30.992623] ? trace_hardirqs_off+0x10/0x10 [ 30.996913] ? lock_acquire+0x1d5/0x580 [ 31.000853] ? lock_acquire+0x1d5/0x580 [ 31.004792] ? inet6_csk_xmit+0x114/0x580 [ 31.008907] ? trace_hardirqs_off+0x10/0x10 [ 31.013199] ? lock_release+0xa40/0xa40 [ 31.017147] inet6_csk_xmit+0x2fc/0x580 [ 31.021089] ? inet6_csk_update_pmtu+0x160/0x160 [ 31.025818] ? __sk_dst_check+0x1a5/0x380 [ 31.029933] ? sock_kfree_s+0x60/0x60 [ 31.033712] l2tp_xmit_skb+0x105f/0x1410 [ 31.037744] ? l2tp_session_create+0xb80/0xb80 [ 31.042293] ? sock_wmalloc+0x15d/0x1d0 [ 31.046233] ? iov_iter_advance+0x13f0/0x13f0 [ 31.051069] ? pppol2tp_sendmsg+0x41b/0x670 [ 31.055363] pppol2tp_sendmsg+0x470/0x670 [ 31.059482] ? selinux_socket_sendmsg+0x36/0x40 [ 31.064117] ? pppol2tp_getsockopt+0x900/0x900 [ 31.068666] sock_sendmsg+0xca/0x110 [ 31.072346] SYSC_sendto+0x361/0x5c0 [ 31.076027] ? SYSC_connect+0x4a0/0x4a0 [ 31.079972] ? find_held_lock+0x35/0x1d0 [ 31.084004] ? lock_downgrade+0x980/0x980 [ 31.088134] ? __do_page_fault+0x3d6/0xc90 [ 31.092334] ? compat_writev+0x420/0x420 [ 31.096368] SyS_sendto+0x40/0x50 [ 31.099790] ? SyS_getpeername+0x30/0x30 [ 31.103817] do_fast_syscall_32+0x3ec/0xf9f [ 31.108107] ? do_int80_syscall_32+0x9c0/0x9c0 [ 31.112655] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.117380] ? syscall_return_slowpath+0x2ac/0x550 [ 31.122277] ? prepare_exit_to_usermode+0x350/0x350 [ 31.127263] ? sysret32_from_system_call+0x5/0x3c [ 31.132076] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.136887] entry_SYSENTER_compat+0x70/0x7f [ 31.141261] RIP: 0023:0xf7f77c99 [ 31.144591] RSP: 002b:000000000844e9cc EFLAGS: 00000202 ORIG_RAX: 0000000000000171 [ 31.152266] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000020001180 [ 31.159506] RDX: 0000000000000000 RSI: 0000000000040001 RDI: 00000000200021c0 [ 31.166743] RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000000 [ 31.173980] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 31.181215] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 31.188975] Dumping ftrace buffer: [ 31.192484] (ftrace buffer empty) [ 31.196162] Kernel Offset: disabled [ 31.199757] Rebooting in 86400 seconds..