[FFmpeg-devel] Fix leak when user preallocates a AVFormatContext, passes it to av_open_input_file, but file does not exist on disk

Art Clarke aclarke
Tue Jul 7 21:57:02 CEST 2009

On Mon, Jul 6, 2009 at 8:05 AM, Art Clarke <aclarke at xuggle.com> wrote:

> On Thu, Jul 2, 2009 at 2:47 PM, Art Clarke <aclarke at xuggle.com> wrote:
>> av_open_input_file takes memory ownership of *ic_ptr, and therefore must
>> free it if it nulls it.  If you pass in your own AVFormatContext (i.e. you
>> pass in AVFormatParameters with prealloced_context>0), but then the file
>> doesn't exist on disk, the current code nulls the AVFormatContext pointer
>> without freeing it (while if av_open_input_stream fails, it will free it
>> before nulling it).
>> This patch makes the behavior consistent and patches a leak as a result.
> Ping?

Again (and last time; I'll assume rejected otherwise).

- Art

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-------------- next part --------------
Index: libavformat/utils.c
--- libavformat/utils.c	(revision 19327)
+++ libavformat/utils.c	(working copy)
@@ -499,6 +499,7 @@
     if (pb)
+    av_free(*ic_ptr);
     *ic_ptr = NULL;
     return err;

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