[....] Starting enhanced syslogd: rsyslogd[ 16.891991] audit: type=1400 audit(1517931378.462:5): avc: denied { syslog } for pid=3924 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: [ 21.483387] audit: type=1400 audit(1517931383.054:6): avc: denied { map } for pid=4064 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 '10.128.15.225' (ECDSA) to the list of known hosts. net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 65.178695] audit: type=1400 audit(1517931426.749:7): avc: denied { map } for pid=4081 comm="syzkaller609474" path="/root/syzkaller609474252" 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 [ 65.183939] IPVS: ftp: loaded support on port[0] = 21 RTNETLINK answers: Operation not supported RTNETLINK answers: No buffer space available RTNETLINK answers: Operation not supported [ 65.418664] 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 [ 65.754334] ------------[ cut here ]------------ [ 65.759158] Bad or missing usercopy whitelist? Kernel memory exposure attempt detected from SLAB object 'skbuff_head_cache' (offset 64, size 16)! [ 65.772740] WARNING: CPU: 1 PID: 4082 at mm/usercopy.c:81 usercopy_warn+0xdb/0x100 [ 65.780444] Kernel panic - not syncing: panic_on_warn set ... [ 65.780444] [ 65.787794] CPU: 1 PID: 4082 Comm: syzkaller609474 Not tainted 4.15.0+ #221 [ 65.794885] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.804224] Call Trace: [ 65.806802] dump_stack+0x194/0x257 [ 65.810418] ? arch_local_irq_restore+0x53/0x53 [ 65.815072] ? vsnprintf+0x1ed/0x1900 [ 65.818855] panic+0x1e4/0x41c [ 65.822025] ? refcount_error_report+0x214/0x214 [ 65.826766] ? show_regs_print_info+0x18/0x18 [ 65.831265] ? __warn+0x1c1/0x200 [ 65.834716] ? usercopy_warn+0xdb/0x100 [ 65.838680] __warn+0x1dc/0x200 [ 65.841947] ? usercopy_warn+0xdb/0x100 [ 65.845902] report_bug+0x211/0x2d0 [ 65.849515] fixup_bug.part.11+0x37/0x80 [ 65.853565] do_error_trap+0x2d7/0x3e0 [ 65.857445] ? vprintk_default+0x28/0x30 [ 65.861498] ? math_error+0x400/0x400 [ 65.865293] ? printk+0xaa/0xca [ 65.868569] ? show_regs_print_info+0x18/0x18 [ 65.873053] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 65.877880] do_invalid_op+0x1b/0x20 [ 65.881576] invalid_op+0x22/0x40 [ 65.885009] RIP: 0010:usercopy_warn+0xdb/0x100 [ 65.889565] RSP: 0018:ffff8801c523f6e8 EFLAGS: 00010282 [ 65.894925] RAX: dffffc0000000008 RBX: ffffffff86800b47 RCX: ffffffff815a57ae [ 65.902180] RDX: 0000000000000000 RSI: 1ffff10038a47e8d RDI: 1ffff10038a47e62 [ 65.909440] RBP: ffff8801c523f740 R08: 0000000000000000 R09: 0000000000000000 [ 65.916704] R10: 00000000000000e6 R11: 0000000000000000 R12: ffffffff86402580 [ 65.923955] R13: ffffffff85f2d440 R14: 0000000000000040 R15: 0000000000000010 [ 65.931227] ? vprintk_func+0x5e/0xc0 [ 65.935028] ? usercopy_warn+0xdb/0x100 [ 65.938995] __check_heap_object+0x89/0xc0 [ 65.943214] __check_object_size+0x272/0x530 [ 65.947632] ? usercopy_abort+0xd0/0xd0 [ 65.951603] ? copy_user_generic_unrolled+0x89/0xc0 [ 65.956618] ? _copy_to_user+0xa2/0xc0 [ 65.960500] put_cmsg+0x233/0x3f0 [ 65.963946] ? __scm_send+0x11a0/0x11a0 [ 65.967900] ? trace_hardirqs_on+0xd/0x10 [ 65.972028] ? sock_dequeue_err_skb+0x2b1/0x420 [ 65.976679] sock_recv_errqueue+0x200/0x3e0 [ 65.980977] ? rw_copy_check_uvector+0x1be/0x280 [ 65.985718] packet_recvmsg+0xb2e/0x17a0 [ 65.989764] ? packet_getname_spkt+0x2b0/0x2b0 [ 65.994343] ? copy_msghdr_from_user+0x3a6/0x590 [ 65.999090] ? selinux_socket_recvmsg+0x36/0x40 [ 66.003740] ? security_socket_recvmsg+0x91/0xc0 [ 66.008484] ? packet_getname_spkt+0x2b0/0x2b0 [ 66.013049] sock_recvmsg+0xc9/0x110 [ 66.016739] ? __sock_recv_wifi_status+0x210/0x210 [ 66.021659] ___sys_recvmsg+0x2a4/0x640 [ 66.025645] ? ___sys_sendmsg+0x8b0/0x8b0 [ 66.029784] ? __do_page_fault+0x5f7/0xc90 [ 66.033998] ? lock_downgrade+0x980/0x980 [ 66.038140] ? __fget_light+0x297/0x380 [ 66.042099] ? fget_raw+0x20/0x20 [ 66.045547] ? __handle_mm_fault+0x3ce0/0x3ce0 [ 66.050119] ? vmacache_find+0x5f/0x280 [ 66.054078] ? vmacache_update+0xfe/0x130 [ 66.058209] ? up_read+0x1a/0x40 [ 66.061565] ? __do_page_fault+0x3d6/0xc90 [ 66.065782] ? kernel_read+0x120/0x120 [ 66.069644] ? bpf_fd_pass+0x280/0x280 [ 66.073524] ? __fdget+0x18/0x20 [ 66.076880] __sys_recvmsg+0xe2/0x210 [ 66.080674] ? __sys_recvmsg+0xe2/0x210 [ 66.084629] ? SyS_sendmmsg+0x60/0x60 [ 66.088415] ? fget_raw+0x20/0x20 [ 66.091854] ? __do_page_fault+0xc90/0xc90 [ 66.096065] ? __fdget_raw+0x20/0x20 [ 66.099756] ? vfs_write+0x224/0x510 [ 66.103473] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 66.108478] SyS_recvmsg+0x2d/0x50 [ 66.112002] entry_SYSCALL_64_fastpath+0x29/0xa0 [ 66.116731] RIP: 0033:0x4458e9 [ 66.119904] RSP: 002b:00007ffc9c7e5e88 EFLAGS: 00000286 ORIG_RAX: 000000000000002f [ 66.127589] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00000000004458e9 [ 66.134840] RDX: 0000000000002000 RSI: 0000000020006fc8 RDI: 0000000000000004 [ 66.142086] RBP: 00000000004a7493 R08: 00007ffc0000a1fd R09: 00007ffc0000a1fd [ 66.149353] R10: 00007ffc0000a1fd R11: 0000000000000286 R12: 0000000000402a20 [ 66.156609] R13: 0000000000402ab0 R14: 0000000000000000 R15: 0000000000000000 [ 66.164420] Dumping ftrace buffer: [ 66.168069] (ftrace buffer empty) [ 66.171759] Kernel Offset: disabled [ 66.175377] Rebooting in 86400 seconds..