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);
     }