resolv_conf: release lock on allocation failure (#2213908)

Resolves: #2213908

glibc-rh2213908.patch

@@ -0,0 +1,27 @@
+commit abcf8db7fa46b73fd5b8193ce11f9312301b84c7
+Author: Andreas Schwab <schwab@suse.de>
+Date:   Wed Jun 7 11:21:48 2023 +0200
+
+    resolv_conf: release lock on allocation failure (bug 30527)
+    
+    When the initial allocation of global fails, the local lock is left
+    locked.
+    
+    Reported by Steffen Lammel of SAP HANA development.
+
+diff --git a/resolv/resolv_conf.c b/resolv/resolv_conf.c
+index 9010bf0ea4d84557..aab79e9f4e323df9 100644
+--- a/resolv/resolv_conf.c
++++ b/resolv/resolv_conf.c
+@@ -93,7 +93,10 @@ get_locked_global (void)
+     {
+       global_copy = calloc (1, sizeof (*global));
+       if (global_copy == NULL)
+-        return NULL;
++	{
++	  __libc_lock_unlock (lock);
++	  return NULL;
++	}
+       atomic_store_relaxed (&global, global_copy);
+       resolv_conf_array_init (&global_copy->array);
+     }

glibc.spec

@@ -155,7 +155,7 @@ end \
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 69%{?dist}
+Release: 70%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -723,6 +723,7 @@ Patch484: glibc-upstream-2.34-397.patch
 # All future backports need maintain CentOS 9 Stream and RHEL 9 only.
 
 Patch485: glibc-rh2215368.patch
+Patch486: glibc-rh2213908.patch
 
 ##############################################################################
 # Continued list of core "glibc" package information:
@@ -2880,6 +2881,9 @@ update_gconv_modules_cache ()
 %endif
 
 %changelog
+* Mon Jun 26 2023 Arjun Shankar <arjun@redhat.com> - 2.34-70
+- resolv_conf: release lock on allocation failure (#2213908)
+
 * Mon Jun 26 2023 Arjun Shankar <arjun@redhat.com> - 2.34-69
 - strerror must not return NULL (#2215368)