[....] Starting enhanced syslogd: rsyslogd[ 16.202515] audit: type=1400 audit(1517932515.372:5): avc: denied { syslog } for pid=4018 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 mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] 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: [ 18.481539] audit: type=1400 audit(1517932517.651:6): avc: denied { map } for pid=4158 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 '10.128.0.32' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 41.257926] audit: type=1400 audit(1517932540.427:7): avc: denied { map } for pid=4176 comm="syzkaller502931" path="/root/syzkaller502931984" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 41.546782] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Operation not supported RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument RTNETLINK answers: Invalid argument executing program [ 41.887376] ------------[ cut here ]------------ [ 41.892238] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLAB object 'skbuff_head_cache' (offset 64, size 16)! [ 41.905503] WARNING: CPU: 1 PID: 4176 at mm/usercopy.c:81 usercopy_warn+0xdb/0x100 [ 41.913190] Kernel panic - not syncing: panic_on_warn set ... [ 41.913190] [ 41.920535] CPU: 1 PID: 4176 Comm: syzkaller502931 Not tainted 4.15.0+ #299 [ 41.927610] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.936939] Call Trace: [ 41.939509] dump_stack+0x194/0x257 [ 41.943118] ? arch_local_irq_restore+0x53/0x53 [ 41.947765] ? vsnprintf+0x1ed/0x1900 [ 41.951546] panic+0x1e4/0x41c [ 41.954710] ? refcount_error_report+0x214/0x214 [ 41.959437] ? show_regs_print_info+0x18/0x18 [ 41.963913] ? __warn+0x1c1/0x200 [ 41.967342] ? usercopy_warn+0xdb/0x100 [ 41.971290] __warn+0x1dc/0x200 [ 41.974556] ? usercopy_warn+0xdb/0x100 [ 41.978507] report_bug+0x211/0x2d0 [ 41.982123] fixup_bug.part.11+0x37/0x80 [ 41.986162] do_error_trap+0x2d7/0x3e0 [ 41.990024] ? vprintk_default+0x28/0x30 [ 41.994065] ? math_error+0x400/0x400 [ 41.997844] ? printk+0xaa/0xca [ 42.001099] ? show_regs_print_info+0x18/0x18 [ 42.005578] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.010401] do_invalid_op+0x1b/0x20 [ 42.014090] invalid_op+0x22/0x40 [ 42.017525] RIP: 0010:usercopy_warn+0xdb/0x100 [ 42.022074] RSP: 0018:ffff8801b2bc7598 EFLAGS: 00010286 [ 42.027410] RAX: dffffc0000000008 RBX: ffffffff86801907 RCX: ffffffff815a585e [ 42.034655] RDX: 0000000000000000 RSI: 1ffff10036578e63 RDI: 1ffff10036578e38 [ 42.041916] RBP: ffff8801b2bc75f0 R08: 0000000000000000 R09: 0000000000000000 [ 42.049157] R10: 00000000000007a6 R11: 0000000000000000 R12: ffffffff86403180 [ 42.056399] R13: ffffffff85f2d4c0 R14: 0000000000000040 R15: 0000000000000010 [ 42.063656] ? vprintk_func+0x5e/0xc0 [ 42.067438] ? usercopy_warn+0xdb/0x100 [ 42.071402] __check_heap_object+0x89/0xc0 [ 42.075620] __check_object_size+0x272/0x530 [ 42.080010] ? usercopy_abort+0xd0/0xd0 [ 42.083968] ? copy_user_generic_unrolled+0x89/0xc0 [ 42.088964] ? _copy_to_user+0xa2/0xc0 [ 42.092833] put_cmsg+0x233/0x3f0 [ 42.096263] ? __scm_send+0x11a0/0x11a0 [ 42.100208] ? trace_hardirqs_on+0xd/0x10 [ 42.104333] ? sock_dequeue_err_skb+0x2b1/0x420 [ 42.108985] sock_recv_errqueue+0x200/0x3e0 [ 42.113281] ? rw_copy_check_uvector+0x1be/0x280 [ 42.118017] packet_recvmsg+0xb2e/0x17a0 [ 42.122059] ? packet_getname_spkt+0x2b0/0x2b0 [ 42.126624] ? copy_msghdr_from_user+0x3a6/0x590 [ 42.131361] ? selinux_socket_recvmsg+0x36/0x40 [ 42.136006] ? security_socket_recvmsg+0x91/0xc0 [ 42.140741] ? packet_getname_spkt+0x2b0/0x2b0 [ 42.145296] sock_recvmsg+0xc9/0x110 [ 42.148985] ? __sock_recv_wifi_status+0x210/0x210 [ 42.153893] ___sys_recvmsg+0x2a4/0x640 [ 42.157851] ? ___sys_sendmsg+0x8b0/0x8b0 [ 42.161978] ? __pmd_alloc+0x4e0/0x4e0 [ 42.165838] ? check_noncircular+0x20/0x20 [ 42.170047] ? sock_write_iter+0x3f4/0x5d0 [ 42.174255] ? check_noncircular+0x20/0x20 [ 42.178463] ? find_held_lock+0x35/0x1d0 [ 42.182500] ? __fget_light+0x2b2/0x3c0 [ 42.186485] ? fget_raw+0x20/0x20 [ 42.189926] ? find_held_lock+0x35/0x1d0 [ 42.193977] ? __do_page_fault+0x5f7/0xc90 [ 42.198185] ? lock_downgrade+0x980/0x980 [ 42.202318] __sys_recvmsg+0xe2/0x210 [ 42.206090] ? __sys_recvmsg+0xe2/0x210 [ 42.210036] ? SyS_sendmmsg+0x60/0x60 [ 42.213816] ? __do_page_fault+0x3d6/0xc90 [ 42.218035] ? SyS_read+0x220/0x220 [ 42.221638] SyS_recvmsg+0x2d/0x50 [ 42.225150] ? __sys_recvmsg+0x210/0x210 [ 42.229186] do_syscall_64+0x282/0x940 [ 42.233044] ? __do_page_fault+0xc90/0xc90 [ 42.237247] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 42.241975] ? syscall_return_slowpath+0x550/0x550 [ 42.246875] ? syscall_return_slowpath+0x2ac/0x550 [ 42.251778] ? prepare_exit_to_usermode+0x350/0x350 [ 42.256771] ? retint_user+0x18/0x18 [ 42.260462] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 42.265279] entry_SYSCALL_64_after_hwframe+0x26/0x9b [ 42.270438] RIP: 0033:0x445399 [ 42.273599] RSP: 002b:00007ffdfb47d4d8 EFLAGS: 00000217 ORIG_RAX: 000000000000002f [ 42.281278] RAX: ffffffffffffffda RBX: 0000000000000066 RCX: 0000000000445399 [ 42.288518] RDX: 0000000000002000 RSI: 0000000020006fc8 RDI: 0000000000000004 [ 42.295761] RBP: 00007ffdfb47d5e8 R08: 000000000000a1fd R09: 000000000000a1fd [ 42.303000] R10: 000000000000a1fd R11: 0000000000000217 R12: 00007ffdfb47d5e8 [ 42.310245] R13: 0000000000402860 R14: 0000000000000000 R15: 0000000000000000 [ 42.318045] Dumping ftrace buffer: [ 42.321702] (ftrace buffer empty) [ 42.325384] Kernel Offset: disabled [ 42.328984] Rebooting in 86400 seconds..