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getaddrinfo: Fix occasionally empty result due to nscd cache order (RHEL-16643)

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Resolves: RHEL-16643
This commit is contained in:
Arjun Shankar 2024-01-08 14:47:15 +01:00
parent 178dfa8115
commit b02eb10bf8
7 changed files with 975 additions and 1 deletions
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211
glibc-RHEL-16643-1.patch Normal file
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@ -0,0 +1,211 @@
commit 06890c7ba553e82393413c59bb3131db5815a337
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Tue Jul 27 22:49:53 2021 +0530
gaiconf_init: Refactor some bits for readability
Split out line processing for `label`, `precedence` and `scopev4` into
separate functions instead of the gotos.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: DJ Delorie <dj@redhat.com>
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index d6046a707f1d742a..3bf9a8bae16a5b02 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -1858,6 +1858,66 @@ scopecmp (const void *p1, const void *p2)
return 1;
}
+static bool
+add_prefixlist (struct prefixlist **listp, size_t *lenp, bool *nullbitsp,
+ char *val1, char *val2, char **pos)
+{
+ struct in6_addr prefix;
+ unsigned long int bits;
+ unsigned long int val;
+ char *endp;
+
+ bits = 128;
+ __set_errno (0);
+ char *cp = strchr (val1, '/');
+ if (cp != NULL)
+ *cp++ = '\0';
+ *pos = cp;
+ if (inet_pton (AF_INET6, val1, &prefix)
+ && (cp == NULL
+ || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX
+ || errno != ERANGE)
+ && *endp == '\0'
+ && bits <= 128
+ && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX
+ || errno != ERANGE)
+ && *endp == '\0'
+ && val <= INT_MAX)
+ {
+ struct prefixlist *newp = malloc (sizeof (*newp));
+ if (newp == NULL)
+ return false;
+
+ memcpy (&newp->entry.prefix, &prefix, sizeof (prefix));
+ newp->entry.bits = bits;
+ newp->entry.val = val;
+ newp->next = *listp;
+ *listp = newp;
+ ++*lenp;
+ *nullbitsp |= bits == 0;
+ }
+ return true;
+}
+
+static bool
+add_scopelist (struct scopelist **listp, size_t *lenp, bool *nullbitsp,
+ const struct in6_addr *prefixp, unsigned long int bits,
+ unsigned long int val)
+{
+ struct scopelist *newp = malloc (sizeof (*newp));
+ if (newp == NULL)
+ return false;
+
+ newp->entry.netmask = htonl (bits != 96 ? (0xffffffff << (128 - bits)) : 0);
+ newp->entry.addr32 = (prefixp->s6_addr32[3] & newp->entry.netmask);
+ newp->entry.scope = val;
+ newp->next = *listp;
+ *listp = newp;
+ ++*lenp;
+ *nullbitsp |= bits == 96;
+
+ return true;
+}
static void
gaiconf_init (void)
@@ -1933,55 +1993,17 @@ gaiconf_init (void)
/* Ignore the rest of the line. */
*cp = '\0';
- struct prefixlist **listp;
- size_t *lenp;
- bool *nullbitsp;
switch (cmdlen)
{
case 5:
if (strcmp (cmd, "label") == 0)
{
- struct in6_addr prefix;
- unsigned long int bits;
- unsigned long int val;
- char *endp;
-
- listp = &labellist;
- lenp = &nlabellist;
- nullbitsp = &labellist_nullbits;
-
- new_elem:
- bits = 128;
- __set_errno (0);
- cp = strchr (val1, '/');
- if (cp != NULL)
- *cp++ = '\0';
- if (inet_pton (AF_INET6, val1, &prefix)
- && (cp == NULL
- || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX
- || errno != ERANGE)
- && *endp == '\0'
- && bits <= 128
- && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX
- || errno != ERANGE)
- && *endp == '\0'
- && val <= INT_MAX)
+ if (!add_prefixlist (&labellist, &nlabellist,
+ &labellist_nullbits, val1, val2, &cp))
{
- struct prefixlist *newp = malloc (sizeof (*newp));
- if (newp == NULL)
- {
- free (line);
- fclose (fp);
- goto no_file;
- }
-
- memcpy (&newp->entry.prefix, &prefix, sizeof (prefix));
- newp->entry.bits = bits;
- newp->entry.val = val;
- newp->next = *listp;
- *listp = newp;
- ++*lenp;
- *nullbitsp |= bits == 0;
+ free (line);
+ fclose (fp);
+ goto no_file;
}
}
break;
@@ -2023,27 +2045,14 @@ gaiconf_init (void)
&& *endp == '\0'
&& val <= INT_MAX)
{
- struct scopelist *newp;
- new_scope:
- newp = malloc (sizeof (*newp));
- if (newp == NULL)
+ if (!add_scopelist (&scopelist, &nscopelist,
+ &scopelist_nullbits, &prefix,
+ bits, val))
{
free (line);
fclose (fp);
goto no_file;
}
-
- newp->entry.netmask = htonl (bits != 96
- ? (0xffffffff
- << (128 - bits))
- : 0);
- newp->entry.addr32 = (prefix.s6_addr32[3]
- & newp->entry.netmask);
- newp->entry.scope = val;
- newp->next = scopelist;
- scopelist = newp;
- ++nscopelist;
- scopelist_nullbits |= bits == 96;
}
}
else if (inet_pton (AF_INET, val1, &prefix.s6_addr32[3])
@@ -2057,8 +2066,14 @@ gaiconf_init (void)
&& *endp == '\0'
&& val <= INT_MAX)
{
- bits += 96;
- goto new_scope;
+ if (!add_scopelist (&scopelist, &nscopelist,
+ &scopelist_nullbits, &prefix,
+ bits + 96, val))
+ {
+ free (line);
+ fclose (fp);
+ goto no_file;
+ }
}
}
break;
@@ -2066,10 +2081,14 @@ gaiconf_init (void)
case 10:
if (strcmp (cmd, "precedence") == 0)
{
- listp = &precedencelist;
- lenp = &nprecedencelist;
- nullbitsp = &precedencelist_nullbits;
- goto new_elem;
+ if (!add_prefixlist (&precedencelist, &nprecedencelist,
+ &precedencelist_nullbits, val1, val2,
+ &cp))
+ {
+ free (line);
+ fclose (fp);
+ goto no_file;
+ }
}
break;
}

584
glibc-RHEL-16643-2.patch Normal file
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@ -0,0 +1,584 @@
commit bc0d18d873abf2cda6842ad8bb4df2a31dc0fbac
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Tue Aug 3 21:29:23 2021 +0530
gai_init: Avoid jumping from if condition to its else counterpart
Clean up another antipattern where code flows from an if condition to
its else counterpart with a goto.
Most of the change in this patch is whitespace-only; a `git diff -b`
ought to show the actual logic changes.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: DJ Delorie <dj@redhat.com>
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 3bf9a8bae16a5b02..1635a09837351068 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -1933,142 +1933,122 @@ gaiconf_init (void)
bool scopelist_nullbits = false;
FILE *fp = fopen (GAICONF_FNAME, "rce");
- if (fp != NULL)
+ if (fp == NULL)
+ goto no_file;
+
+ struct __stat64_t64 st;
+ if (__fstat64_time64 (fileno (fp), &st) != 0)
{
- struct __stat64_t64 st;
- if (__fstat64_time64 (fileno (fp), &st) != 0)
- {
- fclose (fp);
- goto no_file;
- }
+ fclose (fp);
+ goto no_file;
+ }
- char *line = NULL;
- size_t linelen = 0;
+ char *line = NULL;
+ size_t linelen = 0;
- __fsetlocking (fp, FSETLOCKING_BYCALLER);
+ __fsetlocking (fp, FSETLOCKING_BYCALLER);
- while (!feof_unlocked (fp))
- {
- ssize_t n = __getline (&line, &linelen, fp);
- if (n <= 0)
- break;
+ while (!feof_unlocked (fp))
+ {
+ ssize_t n = __getline (&line, &linelen, fp);
+ if (n <= 0)
+ break;
- /* Handle comments. No escaping possible so this is easy. */
- char *cp = strchr (line, '#');
- if (cp != NULL)
- *cp = '\0';
+ /* Handle comments. No escaping possible so this is easy. */
+ char *cp = strchr (line, '#');
+ if (cp != NULL)
+ *cp = '\0';
- cp = line;
- while (isspace (*cp))
- ++cp;
+ cp = line;
+ while (isspace (*cp))
+ ++cp;
- char *cmd = cp;
- while (*cp != '\0' && !isspace (*cp))
- ++cp;
- size_t cmdlen = cp - cmd;
+ char *cmd = cp;
+ while (*cp != '\0' && !isspace (*cp))
+ ++cp;
+ size_t cmdlen = cp - cmd;
- if (*cp != '\0')
- *cp++ = '\0';
- while (isspace (*cp))
- ++cp;
+ if (*cp != '\0')
+ *cp++ = '\0';
+ while (isspace (*cp))
+ ++cp;
- char *val1 = cp;
- while (*cp != '\0' && !isspace (*cp))
- ++cp;
- size_t val1len = cp - cmd;
+ char *val1 = cp;
+ while (*cp != '\0' && !isspace (*cp))
+ ++cp;
+ size_t val1len = cp - cmd;
- /* We always need at least two values. */
- if (val1len == 0)
- continue;
+ /* We always need at least two values. */
+ if (val1len == 0)
+ continue;
- if (*cp != '\0')
- *cp++ = '\0';
- while (isspace (*cp))
- ++cp;
+ if (*cp != '\0')
+ *cp++ = '\0';
+ while (isspace (*cp))
+ ++cp;
- char *val2 = cp;
- while (*cp != '\0' && !isspace (*cp))
- ++cp;
+ char *val2 = cp;
+ while (*cp != '\0' && !isspace (*cp))
+ ++cp;
- /* Ignore the rest of the line. */
- *cp = '\0';
+ /* Ignore the rest of the line. */
+ *cp = '\0';
- switch (cmdlen)
+ switch (cmdlen)
+ {
+ case 5:
+ if (strcmp (cmd, "label") == 0)
{
- case 5:
- if (strcmp (cmd, "label") == 0)
+ if (!add_prefixlist (&labellist, &nlabellist,
+ &labellist_nullbits, val1, val2, &cp))
{
- if (!add_prefixlist (&labellist, &nlabellist,
- &labellist_nullbits, val1, val2, &cp))
- {
- free (line);
- fclose (fp);
- goto no_file;
- }
+ free (line);
+ fclose (fp);
+ goto no_file;
}
- break;
+ }
+ break;
- case 6:
- if (strcmp (cmd, "reload") == 0)
- {
- gaiconf_reload_flag = strcmp (val1, "yes") == 0;
- if (gaiconf_reload_flag)
- gaiconf_reload_flag_ever_set = 1;
- }
- break;
+ case 6:
+ if (strcmp (cmd, "reload") == 0)
+ {
+ gaiconf_reload_flag = strcmp (val1, "yes") == 0;
+ if (gaiconf_reload_flag)
+ gaiconf_reload_flag_ever_set = 1;
+ }
+ break;
- case 7:
- if (strcmp (cmd, "scopev4") == 0)
+ case 7:
+ if (strcmp (cmd, "scopev4") == 0)
+ {
+ struct in6_addr prefix;
+ unsigned long int bits;
+ unsigned long int val;
+ char *endp;
+
+ bits = 32;
+ __set_errno (0);
+ cp = strchr (val1, '/');
+ if (cp != NULL)
+ *cp++ = '\0';
+ if (inet_pton (AF_INET6, val1, &prefix))
{
- struct in6_addr prefix;
- unsigned long int bits;
- unsigned long int val;
- char *endp;
-
- bits = 32;
- __set_errno (0);
- cp = strchr (val1, '/');
- if (cp != NULL)
- *cp++ = '\0';
- if (inet_pton (AF_INET6, val1, &prefix))
- {
- bits = 128;
- if (IN6_IS_ADDR_V4MAPPED (&prefix)
- && (cp == NULL
- || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX
- || errno != ERANGE)
- && *endp == '\0'
- && bits >= 96
- && bits <= 128
- && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX
- || errno != ERANGE)
- && *endp == '\0'
- && val <= INT_MAX)
- {
- if (!add_scopelist (&scopelist, &nscopelist,
- &scopelist_nullbits, &prefix,
- bits, val))
- {
- free (line);
- fclose (fp);
- goto no_file;
- }
- }
- }
- else if (inet_pton (AF_INET, val1, &prefix.s6_addr32[3])
- && (cp == NULL
- || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX
- || errno != ERANGE)
- && *endp == '\0'
- && bits <= 32
- && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX
- || errno != ERANGE)
- && *endp == '\0'
- && val <= INT_MAX)
+ bits = 128;
+ if (IN6_IS_ADDR_V4MAPPED (&prefix)
+ && (cp == NULL
+ || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX
+ || errno != ERANGE)
+ && *endp == '\0'
+ && bits >= 96
+ && bits <= 128
+ && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX
+ || errno != ERANGE)
+ && *endp == '\0'
+ && val <= INT_MAX)
{
if (!add_scopelist (&scopelist, &nscopelist,
&scopelist_nullbits, &prefix,
- bits + 96, val))
+ bits, val))
{
free (line);
fclose (fp);
@@ -2076,173 +2056,191 @@ gaiconf_init (void)
}
}
}
- break;
-
- case 10:
- if (strcmp (cmd, "precedence") == 0)
+ else if (inet_pton (AF_INET, val1, &prefix.s6_addr32[3])
+ && (cp == NULL
+ || (bits = strtoul (cp, &endp, 10)) != ULONG_MAX
+ || errno != ERANGE)
+ && *endp == '\0'
+ && bits <= 32
+ && ((val = strtoul (val2, &endp, 10)) != ULONG_MAX
+ || errno != ERANGE)
+ && *endp == '\0'
+ && val <= INT_MAX)
{
- if (!add_prefixlist (&precedencelist, &nprecedencelist,
- &precedencelist_nullbits, val1, val2,
- &cp))
+ if (!add_scopelist (&scopelist, &nscopelist,
+ &scopelist_nullbits, &prefix,
+ bits + 96, val))
{
free (line);
fclose (fp);
goto no_file;
}
}
- break;
- }
- }
-
- free (line);
-
- fclose (fp);
-
- /* Create the array for the labels. */
- struct prefixentry *new_labels;
- if (nlabellist > 0)
- {
- if (!labellist_nullbits)
- ++nlabellist;
- new_labels = malloc (nlabellist * sizeof (*new_labels));
- if (new_labels == NULL)
- goto no_file;
-
- int i = nlabellist;
- if (!labellist_nullbits)
- {
- --i;
- memset (&new_labels[i].prefix, '\0', sizeof (struct in6_addr));
- new_labels[i].bits = 0;
- new_labels[i].val = 1;
}
+ break;
- struct prefixlist *l = labellist;
- while (i-- > 0)
+ case 10:
+ if (strcmp (cmd, "precedence") == 0)
{
- new_labels[i] = l->entry;
- l = l->next;
+ if (!add_prefixlist (&precedencelist, &nprecedencelist,
+ &precedencelist_nullbits, val1, val2,
+ &cp))
+ {
+ free (line);
+ fclose (fp);
+ goto no_file;
+ }
}
- free_prefixlist (labellist);
- labellist = NULL;
-
- /* Sort the entries so that the most specific ones are at
- the beginning. */
- qsort (new_labels, nlabellist, sizeof (*new_labels), prefixcmp);
+ break;
}
- else
- new_labels = (struct prefixentry *) default_labels;
-
- struct prefixentry *new_precedence;
- if (nprecedencelist > 0)
- {
- if (!precedencelist_nullbits)
- ++nprecedencelist;
- new_precedence = malloc (nprecedencelist * sizeof (*new_precedence));
- if (new_precedence == NULL)
- {
- if (new_labels != default_labels)
- free (new_labels);
- goto no_file;
- }
+ }
- int i = nprecedencelist;
- if (!precedencelist_nullbits)
- {
- --i;
- memset (&new_precedence[i].prefix, '\0',
- sizeof (struct in6_addr));
- new_precedence[i].bits = 0;
- new_precedence[i].val = 40;
- }
+ free (line);
- struct prefixlist *l = precedencelist;
- while (i-- > 0)
- {
- new_precedence[i] = l->entry;
- l = l->next;
- }
- free_prefixlist (precedencelist);
- precedencelist = NULL;
+ fclose (fp);
- /* Sort the entries so that the most specific ones are at
- the beginning. */
- qsort (new_precedence, nprecedencelist, sizeof (*new_precedence),
- prefixcmp);
+ /* Create the array for the labels. */
+ struct prefixentry *new_labels;
+ if (nlabellist > 0)
+ {
+ if (!labellist_nullbits)
+ ++nlabellist;
+ new_labels = malloc (nlabellist * sizeof (*new_labels));
+ if (new_labels == NULL)
+ goto no_file;
+
+ int i = nlabellist;
+ if (!labellist_nullbits)
+ {
+ --i;
+ memset (&new_labels[i].prefix, '\0', sizeof (struct in6_addr));
+ new_labels[i].bits = 0;
+ new_labels[i].val = 1;
}
- else
- new_precedence = (struct prefixentry *) default_precedence;
- struct scopeentry *new_scopes;
- if (nscopelist > 0)
+ struct prefixlist *l = labellist;
+ while (i-- > 0)
{
- if (!scopelist_nullbits)
- ++nscopelist;
- new_scopes = malloc (nscopelist * sizeof (*new_scopes));
- if (new_scopes == NULL)
- {
- if (new_labels != default_labels)
- free (new_labels);
- if (new_precedence != default_precedence)
- free (new_precedence);
- goto no_file;
- }
-
- int i = nscopelist;
- if (!scopelist_nullbits)
- {
- --i;
- new_scopes[i].addr32 = 0;
- new_scopes[i].netmask = 0;
- new_scopes[i].scope = 14;
- }
+ new_labels[i] = l->entry;
+ l = l->next;
+ }
+ free_prefixlist (labellist);
+ labellist = NULL;
- struct scopelist *l = scopelist;
- while (i-- > 0)
- {
- new_scopes[i] = l->entry;
- l = l->next;
- }
- free_scopelist (scopelist);
+ /* Sort the entries so that the most specific ones are at
+ the beginning. */
+ qsort (new_labels, nlabellist, sizeof (*new_labels), prefixcmp);
+ }
+ else
+ new_labels = (struct prefixentry *) default_labels;
- /* Sort the entries so that the most specific ones are at
- the beginning. */
- qsort (new_scopes, nscopelist, sizeof (*new_scopes),
- scopecmp);
+ struct prefixentry *new_precedence;
+ if (nprecedencelist > 0)
+ {
+ if (!precedencelist_nullbits)
+ ++nprecedencelist;
+ new_precedence = malloc (nprecedencelist * sizeof (*new_precedence));
+ if (new_precedence == NULL)
+ {
+ if (new_labels != default_labels)
+ free (new_labels);
+ goto no_file;
}
- else
- new_scopes = (struct scopeentry *) default_scopes;
-
- /* Now we are ready to replace the values. */
- const struct prefixentry *old = labels;
- labels = new_labels;
- if (old != default_labels)
- free ((void *) old);
- old = precedence;
- precedence = new_precedence;
- if (old != default_precedence)
- free ((void *) old);
+ int i = nprecedencelist;
+ if (!precedencelist_nullbits)
+ {
+ --i;
+ memset (&new_precedence[i].prefix, '\0',
+ sizeof (struct in6_addr));
+ new_precedence[i].bits = 0;
+ new_precedence[i].val = 40;
+ }
- const struct scopeentry *oldscope = scopes;
- scopes = new_scopes;
- if (oldscope != default_scopes)
- free ((void *) oldscope);
+ struct prefixlist *l = precedencelist;
+ while (i-- > 0)
+ {
+ new_precedence[i] = l->entry;
+ l = l->next;
+ }
+ free_prefixlist (precedencelist);
+ precedencelist = NULL;
- save_gaiconf_mtime (&st);
+ /* Sort the entries so that the most specific ones are at
+ the beginning. */
+ qsort (new_precedence, nprecedencelist, sizeof (*new_precedence),
+ prefixcmp);
}
else
+ new_precedence = (struct prefixentry *) default_precedence;
+
+ struct scopeentry *new_scopes;
+ if (nscopelist > 0)
{
- no_file:
- free_prefixlist (labellist);
- free_prefixlist (precedencelist);
+ if (!scopelist_nullbits)
+ ++nscopelist;
+ new_scopes = malloc (nscopelist * sizeof (*new_scopes));
+ if (new_scopes == NULL)
+ {
+ if (new_labels != default_labels)
+ free (new_labels);
+ if (new_precedence != default_precedence)
+ free (new_precedence);
+ goto no_file;
+ }
+
+ int i = nscopelist;
+ if (!scopelist_nullbits)
+ {
+ --i;
+ new_scopes[i].addr32 = 0;
+ new_scopes[i].netmask = 0;
+ new_scopes[i].scope = 14;
+ }
+
+ struct scopelist *l = scopelist;
+ while (i-- > 0)
+ {
+ new_scopes[i] = l->entry;
+ l = l->next;
+ }
free_scopelist (scopelist);
- /* If we previously read the file but it is gone now, free the
- old data and use the builtin one. Leave the reload flag
- alone. */
- fini ();
+ /* Sort the entries so that the most specific ones are at
+ the beginning. */
+ qsort (new_scopes, nscopelist, sizeof (*new_scopes),
+ scopecmp);
}
+ else
+ new_scopes = (struct scopeentry *) default_scopes;
+
+ /* Now we are ready to replace the values. */
+ const struct prefixentry *old = labels;
+ labels = new_labels;
+ if (old != default_labels)
+ free ((void *) old);
+
+ old = precedence;
+ precedence = new_precedence;
+ if (old != default_precedence)
+ free ((void *) old);
+
+ const struct scopeentry *oldscope = scopes;
+ scopes = new_scopes;
+ if (oldscope != default_scopes)
+ free ((void *) oldscope);
+
+ save_gaiconf_mtime (&st);
+ return;
+
+no_file:
+ free_prefixlist (labellist);
+ free_prefixlist (precedencelist);
+ free_scopelist (scopelist);
+
+ /* If we previously read the file but it is gone now, free the old data and
+ use the builtin one. Leave the reload flag alone. */
+ fini ();
}

90
glibc-RHEL-16643-3.patch Normal file
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@ -0,0 +1,90 @@
commit d3f2c2c8b57bdf9d963db8fa2372d6c1b86a337e
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Tue Mar 22 22:40:05 2022 +0530
getaddrinfo: Refactor code for readability
The close_retry goto jump is confusing and clumsy to read, so refactor
the code a bit to make it easier to follow.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: DJ Delorie <dj@redhat.com>
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 1635a09837351068..5e9bd17eb949974c 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -2253,6 +2253,36 @@ gaiconf_reload (void)
gaiconf_init ();
}
+static bool
+try_connect (int *fdp, int *afp, struct sockaddr_in6 *source_addrp,
+ const struct sockaddr *addr, socklen_t addrlen, int family)
+{
+ int fd = *fdp;
+ int af = *afp;
+ socklen_t sl = sizeof (*source_addrp);
+
+ while (true)
+ {
+ if (fd != -1 && __connect (fd, addr, addrlen) == 0
+ && __getsockname (fd, (struct sockaddr *) source_addrp, &sl) == 0)
+ return true;
+
+ if (errno == EAFNOSUPPORT && af == AF_INET6 && family == AF_INET)
+ {
+ /* This could mean IPv6 sockets are IPv6-only. */
+ if (fd != -1)
+ __close_nocancel_nostatus (fd);
+ *afp = af = AF_INET;
+ *fdp = fd = __socket (AF_INET, SOCK_DGRAM | SOCK_CLOEXEC,
+ IPPROTO_IP);
+ continue;
+ }
+
+ return false;
+ }
+
+ __builtin_unreachable ();
+}
int
getaddrinfo (const char *name, const char *service,
@@ -2443,7 +2473,6 @@ getaddrinfo (const char *name, const char *service,
if (fd == -1 || (af == AF_INET && q->ai_family == AF_INET6))
{
if (fd != -1)
- close_retry:
__close_nocancel_nostatus (fd);
af = q->ai_family;
fd = __socket (af, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_IP);
@@ -2455,14 +2484,10 @@ getaddrinfo (const char *name, const char *service,
__connect (fd, &sa, sizeof (sa));
}
- socklen_t sl = sizeof (results[i].source_addr);
- if (fd != -1
- && __connect (fd, q->ai_addr, q->ai_addrlen) == 0
- && __getsockname (fd,
- (struct sockaddr *) &results[i].source_addr,
- &sl) == 0)
+ if (try_connect (&fd, &af, &results[i].source_addr, q->ai_addr,
+ q->ai_addrlen, q->ai_family))
{
- results[i].source_addr_len = sl;
+ results[i].source_addr_len = sizeof (results[i].source_addr);
results[i].got_source_addr = true;
if (in6ai != NULL)
@@ -2527,10 +2552,6 @@ getaddrinfo (const char *name, const char *service,
results[i].source_addr_len = sizeof (struct sockaddr_in);
}
}
- else if (errno == EAFNOSUPPORT && af == AF_INET6
- && q->ai_family == AF_INET)
- /* This could mean IPv6 sockets are IPv6-only. */
- goto close_retry;
else
/* Just make sure that if we have to process the same
address again we do not copy any memory. */

32
glibc-RHEL-16643-4.patch Normal file
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@ -0,0 +1,32 @@
commit c9226c03da0276593a0918eaa9a14835183343e8
Author: Jörg Sonnenberger <joerg@bec.de>
Date: Mon Sep 26 13:59:16 2022 -0400
get_nscd_addresses: Fix subscript typos [BZ #29605]
Fix the subscript on air->family, which was accidentally set to COUNT
when it should have remained as I.
Resolves: BZ #29605
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 5e9bd17eb949974c..40a32a3de30cb294 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -549,11 +549,11 @@ get_nscd_addresses (const char *name, const struct addrinfo *req,
at[count].addr[2] = htonl (0xffff);
}
else if (req->ai_family == AF_UNSPEC
- || air->family[count] == req->ai_family)
+ || air->family[i] == req->ai_family)
{
- at[count].family = air->family[count];
+ at[count].family = air->family[i];
memcpy (at[count].addr, addrs, size);
- if (air->family[count] == AF_INET6)
+ if (air->family[i] == AF_INET6)
res->got_ipv6 = true;
}
at[count].next = at + count + 1;

25
glibc-RHEL-16643-5.patch Normal file
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@ -0,0 +1,25 @@
commit 3bf7bab88b0da01d4f5ef20afbbb45203185501e
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
Date: Tue Sep 5 17:04:05 2023 -0400
getcanonname: Fix a typo
This code is generally unused in practice since there don't seem to be
any NSS modules that only implement _nss_MOD_gethostbyname2_r and not
_nss_MOD_gethostbyname3_r.
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index 40a32a3de30cb294..e9f47aea358a3351 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -346,7 +346,7 @@ getcanonname (nss_action_list nip, const char *hname, const char *name)
string. */
s = (char *) name;
}
- return __strdup (name);
+ return __strdup (s);
}
/* Process looked up canonical name and if necessary, decode to IDNA. Result

23
glibc-RHEL-16643-6.patch Normal file
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@ -0,0 +1,23 @@
commit 61bac1a9d2ab80ebcbc51484722e6ea43414bec7
Author: Florian Weimer <fweimer@redhat.com>
Date: Wed Dec 20 16:14:33 2023 +0100
nss: Remove unused allocation from get_nscd_addresses in getaddrinfo
No bug because this is not visible if glibc is built with
optimization. Otherwise this would be a critical resource leak.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index e9f47aea358a3351..321a6679d46494a3 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -514,7 +514,6 @@ get_nscd_addresses (const char *name, const struct addrinfo *req,
int result = 0;
char *addrs = air->addrs;
- struct gaih_addrtuple *addrfree = calloc (air->naddrs, sizeof (*addrfree));
struct gaih_addrtuple *at = calloc (air->naddrs, sizeof (*at));
if (at == NULL)
{

11
glibc.spec
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@ -155,7 +155,7 @@ end \
Summary: The GNU libc libraries
Name: glibc
Version: %{glibcversion}
Release: 97%{?dist}
Release: 98%{?dist}
# In general, GPLv2+ is used by programs, LGPLv2+ is used for
# libraries.
@ -800,6 +800,12 @@ Patch563: glibc-RHEL-17319-4.patch
Patch564: glibc-RHEL-17465-1.patch
Patch565: glibc-RHEL-17465-2.patch
Patch566: glibc-RHEL-19862.patch
Patch567: glibc-RHEL-16643-1.patch
Patch568: glibc-RHEL-16643-2.patch
Patch569: glibc-RHEL-16643-3.patch
Patch570: glibc-RHEL-16643-4.patch
Patch571: glibc-RHEL-16643-5.patch
Patch572: glibc-RHEL-16643-6.patch
##############################################################################
# Continued list of core "glibc" package information:
@ -2958,6 +2964,9 @@ update_gconv_modules_cache ()
%endif
%changelog
* Mon Jan 8 2024 Arjun Shankar <arjun@redhat.com> - 2.34-98
- getaddrinfo: Fix occasionally empty result due to nscd cache order (RHEL-16643)
* Tue Jan 2 2024 Florian Weimer <fweimer@redhat.com> - 2.34-97
- Re-enable output buffering for wide stdio streams (RHEL-19862)