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return error if len is negative, prevent segfault

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Originally committed as revision 13419 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier
2008-05-26 03:53:10 +00:00
parent 278f987a33
commit e5ece1831a
1 changed files with 2 additions and 0 deletions
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2
libavformat/ffmdec.c
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@@ -89,6 +89,8 @@ static int ffm_read_data(AVFormatContext *s,
while (size > 0) { while (size > 0) {
redo: redo:
len = ffm->packet_end - ffm->packet_ptr; len = ffm->packet_end - ffm->packet_ptr;
if (len < 0)
return -1;
if (len > size) if (len > size)
len = size; len = size;
if (len == 0) { if (len == 0) {