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avformat/nutdec: Check X in 2nd branch of index reading 

Prevents read of uninitialized variable

Based on patch by: Andreas Cadhalpun <andreas.cadhalpun@googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-05-23 00:23:05 +02:00
parent f275f9eaee
commit ebb0ca3d70
1 changed files with 4 additions and 0 deletions
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4
libavformat/nutdec.c
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@ -720,6 +720,10 @@ static int find_and_decode_index(NUTContext *nut)
has_keyframe[n++] = flag;
has_keyframe[n++] = !flag;
} else {
if (x <= 1) {
av_log(s, AV_LOG_ERROR, "index: x %"PRIu64" is invalid\n", x);
goto fail;
}
while (x != 1) {
if (n >= syncpoint_count + 1) {
av_log(s, AV_LOG_ERROR, "index overflow B\n");