From 5898f4548efdcd7c0fd437a74eeb80facc51a117 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Wed, 30 Aug 2017 20:10:56 +0200
Subject: dynarray: Set errno on overflow-induced allocation failure

This allows the caller to return directly on such an error, with an
appropriate errno value.
---
 malloc/dynarray_emplace_enlarge.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'malloc/dynarray_emplace_enlarge.c')

diff --git a/malloc/dynarray_emplace_enlarge.c b/malloc/dynarray_emplace_enlarge.c
index dfc70017ce..0fb032765c 100644
--- a/malloc/dynarray_emplace_enlarge.c
+++ b/malloc/dynarray_emplace_enlarge.c
@@ -17,6 +17,7 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <dynarray.h>
+#include <errno.h>
 #include <malloc-internal.h>
 #include <stdlib.h>
 #include <string.h>
@@ -43,8 +44,11 @@ __libc_dynarray_emplace_enlarge (struct dynarray_header *list,
     {
       new_allocated = list->allocated + list->allocated / 2 + 1;
       if (new_allocated <= list->allocated)
-        /* Overflow.  */
-        return false;
+        {
+          /* Overflow.  */
+          __set_errno (ENOMEM);
+          return false;
+        }
     }
 
   size_t new_size;
-- 
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