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10l bug, use av_fast_malloc() instead if av_malloc() for allocating audio 

buffers.
This and the previous revision fix a heap overflow.

Originally committed as revision 20769 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-12-08 14:48:36 +00:00
parent 15bfe412b7
commit b8919a3092
1 changed files with 4 additions and 5 deletions
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ffmpeg.c
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@ -219,6 +219,7 @@ static int64_t timer_start;
static uint8_t *audio_buf;
static uint8_t *audio_out;
unsigned int allocated_audio_out_size, allocated_audio_buf_size;
static short *samples;
@ -449,6 +450,7 @@ static int av_exit(int ret)
av_free(sws_opts);
av_free(audio_buf);
av_free(audio_out);
allocated_audio_buf_size= allocated_audio_out_size= 0;
av_free(samples);
if (received_sigterm) {
@ -579,11 +581,8 @@ static void do_audio_out(AVFormatContext *s,
av_exit(1);
}
/* SC: dynamic allocation of buffers */
if (!audio_buf)
audio_buf = av_malloc(audio_buf_size);
if (!audio_out)
audio_out = av_malloc(audio_out_size);
av_fast_malloc(&audio_buf, &allocated_audio_buf_size, audio_buf_size);
av_fast_malloc(&audio_out, &allocated_audio_out_size, audio_out_size);
if (!audio_buf || !audio_out)
return; /* Should signal an error ! */