From abcf8db7fa46b73fd5b8193ce11f9312301b84c7 Mon Sep 17 00:00:00 2001

From: Andreas Schwab <schwab@suse.de>

Date: Wed, 7 Jun 2023 11:21:48 +0200

Subject: 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 bd5890773b..8bc9edc634 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);

     }