abuf: Correct a corner case with abuf_realloc()
If the buffer is empty and not allocated, then abuf_realloc() tries to
copy invalid data. This happens because an incorrect change to use
memdup() was added after the original code was written.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/abuf.c b/lib/abuf.c
index 4b17e0b..1635d58 100644
--- a/lib/abuf.c
+++ b/lib/abuf.c
@@ -51,9 +51,11 @@
/* not currently allocated and new size is larger. Alloc and
* copy in data. The new space is not inited.
*/
- ptr = memdup(abuf->data, new_size);
+ ptr = malloc(new_size);
if (!ptr)
return false;
+ if (abuf->size)
+ memcpy(ptr, abuf->data, abuf->size);
abuf->data = ptr;
abuf->size = new_size;
abuf->alloced = true;