commit 547ff6618fe75fb04cb5e3deb10163e50d63117c
author Manuel Pégourié-Gonnard <mpg@elzevir.fr> Wed Nov 26 15:42:16 2014 +0100
committer Paul Bakker <p.j.bakker@polarssl.org> Tue Jan 13 14:58:01 2015 +0100
tree 78d67bce047d08856d91a294e8aca2841a06179e
parent 765bb31d242eaa7106010461503b72170c5fc784

Fix NULL dereference in buffer-based allocator

library/memory_buffer_alloc.c

diff --git a/library/memory_buffer_alloc.c b/library/memory_buffer_alloc.c
index 4f96018..9cae251 100644
--- a/library/memory_buffer_alloc.c
+++ b/library/memory_buffer_alloc.c
@@ -484,7 +484,8 @@
     if( old == NULL )
     {
         hdr->next_free = heap.first_free;
-        heap.first_free->prev_free = hdr;
+        if( heap.first_free != NULL )
+            heap.first_free->prev_free = hdr;
         heap.first_free = hdr;
     }