Resolves: #1252570
Revert upstream commit 2212c1420c92a33b0e0bd9a34938c9814a56c0f7.
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408
glibc-rh1252570.patch
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408
glibc-rh1252570.patch
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@ -0,0 +1,408 @@
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Revert this upstream commit:
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commit 2212c1420c92a33b0e0bd9a34938c9814a56c0f7
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Author: Andreas Schwab <schwab@suse.de>
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Date: Thu Feb 19 15:52:08 2015 +0100
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Simplify handling of nameserver configuration in resolver
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Remove use of ext.nsmap member of struct __res_state and always use
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an identity mapping betwen the nsaddr_list array and the ext.nsaddrs
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array. The fact that a nameserver has an IPv6 address is signalled by
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setting nsaddr_list[].sin_family to zero.
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reverted:
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Index: b/resolv/res_init.c
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===================================================================
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--- a/resolv/res_init.c
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+++ b/resolv/res_init.c
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@@ -153,8 +153,10 @@ __res_vinit(res_state statp, int preinit
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char *cp, **pp;
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int n;
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char buf[BUFSIZ];
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- int nserv = 0; /* number of nameservers read from file */
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- int have_serv6 = 0;
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+ int nserv = 0; /* number of IPv4 nameservers read from file */
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+#ifdef _LIBC
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+ int nservall = 0; /* number of (IPv4 + IPV6) nameservers read from file */
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+#endif
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int haveenv = 0;
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int havesearch = 0;
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#ifdef RESOLVSORT
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@@ -183,9 +185,15 @@ __res_vinit(res_state statp, int preinit
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statp->_flags = 0;
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statp->qhook = NULL;
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statp->rhook = NULL;
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+ statp->_u._ext.nsinit = 0;
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statp->_u._ext.nscount = 0;
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- for (n = 0; n < MAXNS; n++)
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- statp->_u._ext.nsaddrs[n] = NULL;
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+#ifdef _LIBC
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+ statp->_u._ext.nscount6 = 0;
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+ for (n = 0; n < MAXNS; n++) {
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+ statp->_u._ext.nsaddrs[n] = NULL;
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+ statp->_u._ext.nsmap[n] = MAXNS;
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+ }
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+#endif
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/* Allow user to override the local domain definition */
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if ((cp = getenv("LOCALDOMAIN")) != NULL) {
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@@ -289,7 +297,11 @@ __res_vinit(res_state statp, int preinit
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continue;
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}
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/* read nameservers to query */
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+#ifdef _LIBC
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+ if (MATCH(buf, "nameserver") && nservall < MAXNS) {
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+#else
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if (MATCH(buf, "nameserver") && nserv < MAXNS) {
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+#endif
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struct in_addr a;
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cp = buf + sizeof("nameserver") - 1;
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@@ -297,12 +309,13 @@ __res_vinit(res_state statp, int preinit
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cp++;
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if ((*cp != '\0') && (*cp != '\n')
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&& __inet_aton(cp, &a)) {
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- statp->nsaddr_list[nserv].sin_addr = a;
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- statp->nsaddr_list[nserv].sin_family = AF_INET;
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- statp->nsaddr_list[nserv].sin_port =
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+ statp->nsaddr_list[nservall].sin_addr = a;
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+ statp->nsaddr_list[nservall].sin_family = AF_INET;
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+ statp->nsaddr_list[nservall].sin_port =
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htons(NAMESERVER_PORT);
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nserv++;
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#ifdef _LIBC
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+ nservall++;
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} else {
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struct in6_addr a6;
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char *el;
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@@ -344,11 +357,10 @@ __res_vinit(res_state statp, int preinit
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}
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}
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- statp->nsaddr_list[nserv].sin_family = 0;
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- statp->_u._ext.nsaddrs[nserv] = sa6;
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- statp->_u._ext.nssocks[nserv] = -1;
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- have_serv6 = 1;
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- nserv++;
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+ statp->_u._ext.nsaddrs[nservall] = sa6;
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+ statp->_u._ext.nssocks[nservall] = -1;
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+ statp->_u._ext.nsmap[nservall] = MAXNS + 1;
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+ nservall++;
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}
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}
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#endif
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@@ -403,9 +415,10 @@ __res_vinit(res_state statp, int preinit
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continue;
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}
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}
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- statp->nscount = nserv;
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+ statp->nscount = nservall;
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#ifdef _LIBC
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- if (have_serv6) {
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+ if (nservall - nserv > 0) {
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+ statp->_u._ext.nscount6 = nservall - nserv;
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/* We try IPv6 servers again. */
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statp->ipv6_unavail = false;
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}
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@@ -594,7 +607,11 @@ __res_iclose(res_state statp, bool free_
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statp->_vcsock = -1;
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statp->_flags &= ~(RES_F_VC | RES_F_CONN);
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}
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+#ifdef _LIBC
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+ for (ns = 0; ns < MAXNS; ns++)
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+#else
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for (ns = 0; ns < statp->_u._ext.nscount; ns++)
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+#endif
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if (statp->_u._ext.nsaddrs[ns]) {
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if (statp->_u._ext.nssocks[ns] != -1) {
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close_not_cancel_no_status(statp->_u._ext.nssocks[ns]);
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@@ -605,6 +622,8 @@ __res_iclose(res_state statp, bool free_
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statp->_u._ext.nsaddrs[ns] = NULL;
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}
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}
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+ if (free_addr)
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+ statp->_u._ext.nsinit = 0;
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}
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libc_hidden_def (__res_iclose)
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Index: b/resolv/res_send.c
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===================================================================
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--- a/resolv/res_send.c
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+++ b/resolv/res_send.c
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@@ -176,7 +176,6 @@ evNowTime(struct timespec *res) {
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/* Forward. */
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-static struct sockaddr *get_nsaddr (res_state, int);
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static int send_vc(res_state, const u_char *, int,
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const u_char *, int,
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u_char **, int *, int *, int, u_char **,
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@@ -214,21 +213,20 @@ res_ourserver_p(const res_state statp, c
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in_port_t port = in4p->sin_port;
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in_addr_t addr = in4p->sin_addr.s_addr;
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- for (ns = 0; ns < statp->nscount; ns++) {
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+ for (ns = 0; ns < MAXNS; ns++) {
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const struct sockaddr_in *srv =
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- (struct sockaddr_in *) get_nsaddr (statp, ns);
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+ (struct sockaddr_in *)EXT(statp).nsaddrs[ns];
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- if ((srv->sin_family == AF_INET) &&
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+ if ((srv != NULL) && (srv->sin_family == AF_INET) &&
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(srv->sin_port == port) &&
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(srv->sin_addr.s_addr == INADDR_ANY ||
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srv->sin_addr.s_addr == addr))
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return (1);
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}
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} else if (inp->sin6_family == AF_INET6) {
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- for (ns = 0; ns < statp->nscount; ns++) {
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- const struct sockaddr_in6 *srv
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- = (struct sockaddr_in6 *) get_nsaddr (statp, ns);
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- if ((srv->sin6_family == AF_INET6) &&
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+ for (ns = 0; ns < MAXNS; ns++) {
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+ const struct sockaddr_in6 *srv = EXT(statp).nsaddrs[ns];
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+ if ((srv != NULL) && (srv->sin6_family == AF_INET6) &&
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(srv->sin6_port == inp->sin6_port) &&
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!(memcmp(&srv->sin6_addr, &in6addr_any,
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sizeof (struct in6_addr)) &&
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@@ -378,48 +376,80 @@ __libc_res_nsend(res_state statp, const
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* If the ns_addr_list in the resolver context has changed, then
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* invalidate our cached copy and the associated timing data.
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*/
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- if (EXT(statp).nscount != 0) {
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+ if (EXT(statp).nsinit) {
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int needclose = 0;
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if (EXT(statp).nscount != statp->nscount)
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needclose++;
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else
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- for (ns = 0; ns < statp->nscount; ns++) {
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- if (statp->nsaddr_list[ns].sin_family != 0
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+ for (ns = 0; ns < MAXNS; ns++) {
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+ unsigned int map = EXT(statp).nsmap[ns];
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+ if (map < MAXNS
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&& !sock_eq((struct sockaddr_in6 *)
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- &statp->nsaddr_list[ns],
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+ &statp->nsaddr_list[map],
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EXT(statp).nsaddrs[ns]))
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{
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needclose++;
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break;
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}
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}
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- if (needclose) {
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+ if (needclose)
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__res_iclose(statp, false);
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- EXT(statp).nscount = 0;
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- }
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}
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/*
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* Maybe initialize our private copy of the ns_addr_list.
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*/
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- if (EXT(statp).nscount == 0) {
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- for (ns = 0; ns < statp->nscount; ns++) {
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- EXT(statp).nssocks[ns] = -1;
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- if (statp->nsaddr_list[ns].sin_family == 0)
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- continue;
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- if (EXT(statp).nsaddrs[ns] == NULL)
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- EXT(statp).nsaddrs[ns] =
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+ if (EXT(statp).nsinit == 0) {
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+ unsigned char map[MAXNS];
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+
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+ memset (map, MAXNS, sizeof (map));
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+ for (n = 0; n < MAXNS; n++) {
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+ ns = EXT(statp).nsmap[n];
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+ if (ns < statp->nscount)
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+ map[ns] = n;
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+ else if (ns < MAXNS) {
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+ free(EXT(statp).nsaddrs[n]);
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+ EXT(statp).nsaddrs[n] = NULL;
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+ EXT(statp).nsmap[n] = MAXNS;
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+ }
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+ }
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+ n = statp->nscount;
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+ if (statp->nscount > EXT(statp).nscount)
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+ for (n = EXT(statp).nscount, ns = 0;
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+ n < statp->nscount; n++) {
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+ while (ns < MAXNS
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+ && EXT(statp).nsmap[ns] != MAXNS)
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+ ns++;
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+ if (ns == MAXNS)
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+ break;
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+ /* NS never exceeds MAXNS, but gcc 4.9 somehow
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+ does not see this. */
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+ DIAG_PUSH_NEEDS_COMMENT;
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+ DIAG_IGNORE_NEEDS_COMMENT (4.9,
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+ "-Warray-bounds");
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+ EXT(statp).nsmap[ns] = n;
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+ DIAG_POP_NEEDS_COMMENT;
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+ map[n] = ns++;
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+ }
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+ EXT(statp).nscount = n;
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+ for (ns = 0; ns < EXT(statp).nscount; ns++) {
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+ n = map[ns];
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+ if (EXT(statp).nsaddrs[n] == NULL)
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+ EXT(statp).nsaddrs[n] =
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malloc(sizeof (struct sockaddr_in6));
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- if (EXT(statp).nsaddrs[ns] != NULL)
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- memset (mempcpy(EXT(statp).nsaddrs[ns],
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+ if (EXT(statp).nsaddrs[n] != NULL) {
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+ memset (mempcpy(EXT(statp).nsaddrs[n],
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&statp->nsaddr_list[ns],
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sizeof (struct sockaddr_in)),
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'\0',
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sizeof (struct sockaddr_in6)
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- sizeof (struct sockaddr_in));
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+ EXT(statp).nssocks[n] = -1;
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+ n++;
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+ }
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}
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- EXT(statp).nscount = statp->nscount;
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+ EXT(statp).nsinit = 1;
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}
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/*
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@@ -428,37 +458,44 @@ __libc_res_nsend(res_state statp, const
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*/
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if (__builtin_expect ((statp->options & RES_ROTATE) != 0, 0) &&
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(statp->options & RES_BLAST) == 0) {
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- struct sockaddr_in ina;
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- struct sockaddr_in6 *inp;
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- int lastns = statp->nscount - 1;
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- int fd;
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-
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- inp = EXT(statp).nsaddrs[0];
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- ina = statp->nsaddr_list[0];
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- fd = EXT(statp).nssocks[0];
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- for (ns = 0; ns < lastns; ns++) {
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- EXT(statp).nsaddrs[ns] = EXT(statp).nsaddrs[ns + 1];
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- statp->nsaddr_list[ns] = statp->nsaddr_list[ns + 1];
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- EXT(statp).nssocks[ns] = EXT(statp).nssocks[ns + 1];
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- }
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- EXT(statp).nsaddrs[lastns] = inp;
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- statp->nsaddr_list[lastns] = ina;
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- EXT(statp).nssocks[lastns] = fd;
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+ struct sockaddr_in6 *ina;
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+ unsigned int map;
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+
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+ n = 0;
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+ while (n < MAXNS && EXT(statp).nsmap[n] == MAXNS)
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+ n++;
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+ if (n < MAXNS) {
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+ ina = EXT(statp).nsaddrs[n];
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+ map = EXT(statp).nsmap[n];
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+ for (;;) {
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+ ns = n + 1;
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+ while (ns < MAXNS
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+ && EXT(statp).nsmap[ns] == MAXNS)
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+ ns++;
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+ if (ns == MAXNS)
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+ break;
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+ EXT(statp).nsaddrs[n] = EXT(statp).nsaddrs[ns];
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+ EXT(statp).nsmap[n] = EXT(statp).nsmap[ns];
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+ n = ns;
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+ }
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+ EXT(statp).nsaddrs[n] = ina;
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+ EXT(statp).nsmap[n] = map;
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+ }
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}
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/*
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* Send request, RETRY times, or until successful.
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*/
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for (try = 0; try < statp->retry; try++) {
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- for (ns = 0; ns < statp->nscount; ns++)
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+ for (ns = 0; ns < MAXNS; ns++)
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{
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#ifdef DEBUG
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char tmpbuf[40];
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#endif
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-#if defined USE_HOOKS || defined DEBUG
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- struct sockaddr *nsap = get_nsaddr (statp, ns);
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-#endif
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+ struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
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+ if (nsap == NULL)
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+ goto next_ns;
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same_ns:
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#ifdef USE_HOOKS
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if (__glibc_unlikely (statp->qhook != NULL)) {
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@@ -615,21 +652,6 @@ libresolv_hidden_def (res_nsend)
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/* Private */
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-static struct sockaddr *
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-get_nsaddr (res_state statp, int n)
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-{
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-
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- if (statp->nsaddr_list[n].sin_family == 0 && EXT(statp).nsaddrs[n] != NULL)
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- /* EXT(statp).nsaddrs[n] holds an address that is larger than
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- struct sockaddr, and user code did not update
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- statp->nsaddr_list[n]. */
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- return (struct sockaddr *) EXT(statp).nsaddrs[n];
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- else
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- /* User code updated statp->nsaddr_list[n], or statp->nsaddr_list[n]
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- has the same content as EXT(statp).nsaddrs[n]. */
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- return (struct sockaddr *) (void *) &statp->nsaddr_list[n];
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-}
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-
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static int
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send_vc(res_state statp,
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const u_char *buf, int buflen, const u_char *buf2, int buflen2,
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@@ -644,7 +666,7 @@ send_vc(res_state statp,
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// XXX REMOVE
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// int anssiz = *anssizp;
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HEADER *anhp = (HEADER *) ans;
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- struct sockaddr *nsap = get_nsaddr (statp, ns);
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+ struct sockaddr_in6 *nsap = EXT(statp).nsaddrs[ns];
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int truncating, connreset, n;
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/* On some architectures compiler might emit a warning indicating
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'resplen' may be used uninitialized. However if buf2 == NULL
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@@ -677,8 +699,8 @@ send_vc(res_state statp,
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if (getpeername(statp->_vcsock,
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(struct sockaddr *)&peer, &size) < 0 ||
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- !sock_eq(&peer, (struct sockaddr_in6 *) nsap)) {
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- __res_iclose(statp, false);
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+ !sock_eq(&peer, nsap)) {
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+ __res_iclose(statp, false);
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statp->_flags &= ~RES_F_VC;
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}
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}
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@@ -687,19 +709,20 @@ send_vc(res_state statp,
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if (statp->_vcsock >= 0)
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__res_iclose(statp, false);
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- statp->_vcsock = socket(nsap->sa_family, SOCK_STREAM, 0);
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+ statp->_vcsock = socket(nsap->sin6_family, SOCK_STREAM, 0);
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if (statp->_vcsock < 0) {
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*terrno = errno;
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Perror(statp, stderr, "socket(vc)", errno);
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return (-1);
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}
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__set_errno (0);
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- if (connect(statp->_vcsock, nsap,
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- nsap->sa_family == AF_INET
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+ if (connect(statp->_vcsock, (struct sockaddr *)nsap,
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+ nsap->sin6_family == AF_INET
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? sizeof (struct sockaddr_in)
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: sizeof (struct sockaddr_in6)) < 0) {
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*terrno = errno;
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- Aerror(statp, stderr, "connect/vc", errno, nsap);
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+ Aerror(statp, stderr, "connect/vc", errno,
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+ (struct sockaddr *) nsap);
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__res_iclose(statp, false);
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return (0);
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}
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@@ -906,7 +929,8 @@ static int
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reopen (res_state statp, int *terrno, int ns)
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{
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if (EXT(statp).nssocks[ns] == -1) {
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- struct sockaddr *nsap = get_nsaddr (statp, ns);
|
||||
+ struct sockaddr *nsap
|
||||
+ = (struct sockaddr *) EXT(statp).nsaddrs[ns];
|
||||
socklen_t slen;
|
||||
|
||||
/* only try IPv6 if IPv6 NS and if not failed before */
|
@ -295,6 +295,9 @@ Patch2035: glibc-nsswitch-Add-group-merging-support.patch
|
||||
Patch2036: glibc-gcc-PR69537.patch
|
||||
Patch2037: glibc-isinf-cxx11.patch
|
||||
|
||||
# Upstream BZ 19573, patch reverts problematic commit
|
||||
Patch2099: glibc-rh1252570.patch
|
||||
|
||||
##############################################################################
|
||||
#
|
||||
# Benchmark comparison patches.
|
||||
@ -690,6 +693,8 @@ cat /proc/meminfo
|
||||
%patch2036 -p1
|
||||
%patch2037 -p1
|
||||
|
||||
%patch2099 -p1
|
||||
|
||||
##############################################################################
|
||||
# %%prep - Additional prep required...
|
||||
##############################################################################
|
||||
@ -1957,6 +1962,7 @@ rm -f *.filelist*
|
||||
%changelog
|
||||
* Mon Feb 15 2016 Florian Weimer <fweimer@redhat.com> - 2.22.90-35
|
||||
- Revert may_alias attribute for struct sockaddr (#1306511).
|
||||
- Revert upstream commit 2212c1420c92a33b0e0bd9a34938c9814a56c0f7 (#1252570).
|
||||
|
||||
* Sat Feb 13 2016 Florian Weimer <fweimer@redhat.com> - 2.22.90-34
|
||||
- Auto-sync with upstream master.
|
||||
|
Loading…
Reference in New Issue
Block a user