Andreas Schwab
e7e38a09c4
- Update to glibc 2.24
* The minimum Linux kernel version that this version of the GNU C Library
can be used with is 3.2
* The pap_AN locale has been deleted
* The readdir_r and readdir64_r functions have been deprecated
* The type `union wait' has been removed
* A new NSS action is added to facilitate large distributed system
administration
* The deprecated __malloc_initialize_hook variable has been removed from
the API
* The long unused localedef --old-style option has been removed
* nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added
to libm
* An unnecessary stack copy in _nss_dns_getnetbyname_r was removed
(CVE-2016-3075)
* Previously, getaddrinfo copied large amounts of address data to the
stack, even after the fix for CVE-2013-4458 has been applied,
potentially resulting in a stack overflow. getaddrinfo now uses a
heap allocation instead (CVE-2016-3706)
* The glob function suffered from a stack-based buffer overflow when it
was called with the GLOB_ALTDIRFUNC flag and encountered a long file
name (CVE-2016-1234)
* The Sun RPC UDP client could exhaust all available stack space when
flooded with crafted ICMP and UDP messages (CVE-2016-4429)
* The IPv6 name server management code in libresolv could result in a
memory leak for each thread which is created, performs a failing
naming lookup, and exits (CVE-2016-5417)
- setcontext-unwind-info.patch: Add EABI unwind info for setcontext on arm
- Removed patches:
* 0001-Updated-translations-for-2.23.patch
OBS-URL: https://build.opensuse.org/request/show/417841
OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=444
122 lines
4.4 KiB
Diff
122 lines
4.4 KiB
Diff
From libc-alpha-return-22754-pasky=ucw.cz@sourceware.org Tue Mar 16 00:47:00 2010
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Message-ID: <4B9E6CFA.7020002@riot.org>
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Date: Mon, 15 Mar 2010 18:23:06 +0100
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From: Sebastian Kienzl <seb@riot.org>
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User-Agent: Thunderbird 2.0.0.23 (Windows/20090812)
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MIME-Version: 1.0
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To: libc-alpha@sourceware.org
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Subject: Reloading of /etc/resolv.conf
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Content-Type: multipart/mixed;
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boundary="------------060407080409020101000002"
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Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm
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This is a multi-part message in MIME format.
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--------------060407080409020101000002
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Content-Type: text/plain; charset=ISO-8859-15; format=flowed
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Content-Transfer-Encoding: 7bit
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Hello!
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There's a patch in the wild against the resolver which makes it reload
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/etc/resolv.conf on change, see
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http://sources.redhat.com/ml/libc-alpha/2004-09/msg00130.html
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However, this patch actually doesn't work properly for multi-threaded
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programs, as only one thread will notice the change and refresh its
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resolver state. I've attached a proper patch. It's for 2.5 but it should
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work with current versions, too.
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Even though the patch may not be interesting for upstream, I decided to
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let you know about this problem, since the mentioned patch seems to be
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used by at least Debian and Ubuntu.
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Regards,
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Seb.
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--------------060407080409020101000002
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Content-Type: text/plain;
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name="glibc-2.5-resolvconf.patch"
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Content-Transfer-Encoding: 7bit
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Content-Disposition: inline;
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filename="glibc-2.5-resolvconf.patch"
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Index: glibc-2.17.90/resolv/res_libc.c
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===================================================================
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--- glibc-2.17.90.orig/resolv/res_libc.c
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+++ glibc-2.17.90/resolv/res_libc.c
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@@ -22,6 +22,7 @@
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#include <arpa/nameser.h>
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#include <resolv.h>
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#include <libc-lock.h>
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+#include <sys/stat.h>
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extern unsigned long long int __res_initstamp attribute_hidden;
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/* We have atomic increment operations on 64-bit platforms. */
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@@ -89,12 +89,34 @@ res_init(void) {
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return (__res_vinit(&_res, 1));
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}
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+static time_t resconf_mtime;
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+__libc_lock_define_initialized (static, resconf_mtime_lock);
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+
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+/* Check if the modification time of resolv.conf has changed.
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+ If so, have all threads re-initialize their resolver states */
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+static void
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+__res_check_resconf (void)
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+{
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+ struct stat statbuf;
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+ if (stat (_PATH_RESCONF, &statbuf) == 0) {
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+ __libc_lock_lock (resconf_mtime_lock);
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+ if (statbuf.st_mtime != resconf_mtime) {
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+ resconf_mtime = statbuf.st_mtime;
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+ atomicinclock (lock);
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+ atomicinc (__res_initstamp);
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+ atomicincunlock (lock);
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+ }
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+ __libc_lock_unlock (resconf_mtime_lock);
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+ }
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+}
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+
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/* Initialize resp if RES_INIT is not yet set or if res_init in some other
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thread requested re-initializing. */
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int
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__res_maybe_init (res_state resp, int preinit)
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{
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if (resp->options & RES_INIT) {
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+ __res_check_resconf ();
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if (__res_initstamp != resp->_u._ext.initstamp) {
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if (resp->nscount > 0)
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__res_iclose (resp, true);
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