Commit dce778e0 authored by Zdenek Kabelac's avatar Zdenek Kabelac
Browse files

* check for potentialy problematic field len

Originally committed as revision 1572 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent b29f97d1
......@@ -1262,16 +1262,16 @@ out:
static int mjpeg_decode_com(MJpegDecodeContext *s)
{
int i;
UINT8 *cbuf;
/* XXX: verify len field validity */
unsigned int len = get_bits(&s->gb, 16)-2;
cbuf = av_malloc(len+1);
for (i = 0; i < len; i++)
unsigned int len = get_bits(&s->gb, 16);
if (len >= 2 && len < 32768) {
/* XXX: any better upper bound */
UINT8 *cbuf = av_malloc(len - 1);
if (cbuf) {
int i;
for (i = 0; i < len - 2; i++)
cbuf[i] = get_bits(&s->gb, 8);
if (cbuf[i-1] == '\n')
if (i > 0 && cbuf[i-1] == '\n')
cbuf[i-1] = 0;
else
cbuf[i] = 0;
......@@ -1282,11 +1282,13 @@ static int mjpeg_decode_com(MJpegDecodeContext *s)
if (!strcmp(cbuf, "AVID"))
{
s->buggy_avid = 1;
// if (s->first_picture)
// printf("mjpeg: workarounding buggy AVID\n");
// if (s->first_picture)
// printf("mjpeg: workarounding buggy AVID\n");
}
av_free(cbuf);
}
}
return 0;
}
......
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