[Qemu-devel] [PATCH] Fix qemu_malloc.

[Qemu-devel] [PATCH] Fix qemu_malloc.

[Gerd Hoffmann]

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bug spotted by malc.

please apply,
  Gerd

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>From 42105a6e8e4969c8f8b683d541a38c4de0e4631f Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 26 Jan 2009 11:40:03 +0100
Subject: [PATCH] Fix qemu_malloc.

make linux-user qemu_realloc handle ptr == NULL correctly.
spotted by malc.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 linux-user/mmap.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index d0fc3e3..888b491 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -128,6 +128,8 @@ void *qemu_realloc(void *ptr, size_t size)
     size_t old_size, copy;
     void *new_ptr;
 
+    if (!ptr)
+        return qemu_malloc(size);
     old_size = *(size_t *)((char *)ptr - 16);
     copy = old_size < size ? old_size : size;
     new_ptr = qemu_malloc(size);
-- 
1.6.1