Hello,

while experimenting with BIND v9.10.2rc1 I found few Valgrind warnings about
operations with uninitialized memory:

$ valgrind --leak-check=full --track-origins=yes named -4 -g -u named -m
record -n 10 -d 10

==9645== Memcheck, a memory error detector
==9645== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==9645== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==9645== Command: named -4 -g -u named -m record -n 10 -d 10
==9645==
12-Feb-2015 15:10:49.935 starting BIND
9.10.2rc1-RedHat-9.10.2-0.1.rc1pspacekO0.fc21 -4 -g -u named -m record -n 10 -d 10
12-Feb-2015 15:10:49.968 built with '--build=x86_64-redhat-linux-gnu'
'--host=x86_64-redhat-linux-gnu' '--program-prefix='
'--disable-dependency-tracking' '--prefix=/usr' '--exec-prefix=/usr'
'--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc'
'--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib64'
'--libexecdir=/usr/libexec' '--sharedstatedir=/var/lib'
'--mandir=/usr/share/man' '--infodir=/usr/share/info' '--with-libtool'
'--localstatedir=/var' '--enable-threads' '--enable-ipv6'
'--enable-filter-aaaa' '--enable-rrl' '--with-pic' '--disable-static'
'--disable-openssl-version-check' '--enable-exportlib'
'--with-export-libdir=/usr/lib64' '--with-export-includedir=/usr/include'
'--includedir=/usr/include/bind9' '--enable-native-pkcs11'
'--with-pkcs11=/usr/lib64/pkcs11/libsofthsm2.so' '--with-dlopen=yes'
'--with-dlz-ldap=yes' '--with-dlz-postgres=yes' '--with-dlz-mysql=yes'
'--with-dlz-filesystem=yes' '--with-dlz-bdb=yes' '--with-gssapi=yes'
'--disable-isc-spnego' '--enable-fixed-rrset'
'--with-docbook-xsl=/usr/share/sgml/docbook/xsl-stylesheets'
'build_alias=x86_64-redhat-linux-gnu' 'host_alias=x86_64-redhat-linux-gnu'
'CFLAGS= -O0 -ggdb' 'LDFLAGS=-Wl,-z,relro ' 'CPPFLAGS= -DDIG_SIGCHASE'
12-Feb-2015 15:10:49.969 ----------------------------------------------------
12-Feb-2015 15:10:49.969 BIND 9 is maintained by Internet Systems Consortium,
12-Feb-2015 15:10:49.970 Inc. (ISC), a non-profit 501(c)(3) public-benefit
12-Feb-2015 15:10:49.970 corporation.  Support and training for BIND 9 are
12-Feb-2015 15:10:49.970 available at https://www.isc.org/support
12-Feb-2015 15:10:49.970 ----------------------------------------------------
12-Feb-2015 15:10:49.975 found 8 CPUs, using 10 worker threads
12-Feb-2015 15:10:49.976 using 4 UDP listeners per interface
12-Feb-2015 15:10:50.192 using up to 4096 sockets
12-Feb-2015 15:10:50.209 Registering DLZ_dlopen driver
12-Feb-2015 15:10:50.210 Registering SDLZ driver 'dlopen'
12-Feb-2015 15:10:50.212 Registering DLZ driver 'dlopen'
12-Feb-2015 15:10:50.827 decrement_reference: delete from rbt: 0x8c309c8 .
12-Feb-2015 15:10:51.174 loading configuration from '/etc/named.conf'
12-Feb-2015 15:10:51.294 set maximum stack size to 18446744073709551615: success
12-Feb-2015 15:10:51.296 set maximum data size to 18446744073709551615: success
12-Feb-2015 15:10:51.297 set maximum core size to 18446744073709551615: success
12-Feb-2015 15:10:51.297 set maximum open files to 18446744073709551615: success
12-Feb-2015 15:10:51.299 max open files (1024) is smaller than max sockets (4096)
12-Feb-2015 15:10:51.336 processing statistics channel 127.0.0.2#8053
12-Feb-2015 15:10:51.358 statistics channel listening on 127.0.0.2#8053
12-Feb-2015 15:10:51.396 using default UDP/IPv4 port range: [1024, 65535]
12-Feb-2015 15:10:51.551 listening on IPv4 interface lo, 127.0.0.2#53
12-Feb-2015 15:10:51.555 clientmgr @0x8c5a890: create
==9645== Thread 6:
==9645== Syscall param sendmsg(msg.msg_control) points to uninitialised byte(s)
==9645==    at 0x6CC571D: ??? (syscall-template.S:81)
==9645==    by 0x688493D: cmsgsend (net.c:555)
==9645==    by 0x6884D28: try_dscp_v4 (net.c:670)
==9645==    by 0x6884FA7: try_dscp (net.c:745)
==9645==    by 0x6CC3B2F: pthread_once (pthread_once.S:103)
==9645==    by 0x6884FC5: initialize_dscp (net.c:751)
==9645==    by 0x6884FEF: isc_net_probedscp (net.c:756)
==9645==    by 0x6889E0B: socket_create (socket.c:2928)
==9645==    by 0x688A155: isc__socket_create (socket.c:2996)
==9645==    by 0x6892DE5: isc_socket_create (socket_api.c:108)
==9645==    by 0x509E5C3: open_socket (dispatch.c:1881)
==9645==    by 0x50A1674: get_udpsocket (dispatch.c:2930)
==9645==  Address 0xbc19d71 is on thread 6's stack
==9645==  in frame #1, created by cmsgsend (net.c:491)
==9645==  Uninitialised value was created by a stack allocation
==9645==    at 0x688468D: cmsgsend (net.c:491)
==9645==
12-Feb-2015 15:10:51.585 sendmsg: Invalid argument
==9645== Syscall param sendmsg(msg.msg_control) points to uninitialised byte(s)
==9645==    at 0x6CC571D: ??? (syscall-template.S:81)
==9645==    by 0x688493D: cmsgsend (net.c:555)
==9645==    by 0x6884F70: try_dscp_v6 (net.c:731)
==9645==    by 0x6884FAC: try_dscp (net.c:746)
==9645==    by 0x6CC3B2F: pthread_once (pthread_once.S:103)
==9645==    by 0x6884FC5: initialize_dscp (net.c:751)
==9645==    by 0x6884FEF: isc_net_probedscp (net.c:756)
==9645==    by 0x6889E0B: socket_create (socket.c:2928)
==9645==    by 0x688A155: isc__socket_create (socket.c:2996)
==9645==    by 0x6892DE5: isc_socket_create (socket_api.c:108)
==9645==    by 0x509E5C3: open_socket (dispatch.c:1881)
==9645==    by 0x50A1674: get_udpsocket (dispatch.c:2930)
==9645==  Address 0xbc19d74 is on thread 6's stack
==9645==  in frame #1, created by cmsgsend (net.c:491)
==9645==  Uninitialised value was created by a stack allocation
==9645==    at 0x688468D: cmsgsend (net.c:491)
==9645==
12-Feb-2015 15:10:51.603 clientmgr @0x8c5a890: createclients

I'm attaching named.conf I use. Have a nice day!

-- 
Petr Spacek  @  Red Hat