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avcodec/microdvddec: limit style characters in parsing 

Fixes: Timeout
Fixes: 9293/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MICRODVD_fuzzer-5643972541153280

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-08-04 02:56:56 +02:00
parent 00ae3498bf
commit f91e7ec9df
1 changed files with 1 additions and 1 deletions
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2
libavcodec/microdvddec.c
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@ -99,7 +99,7 @@ static char *microdvd_load_tags(struct microdvd_tag *tags, char *s)
case 'Y':
tag.persistent = MICRODVD_PERSISTENT_ON;
case 'y':
while (*s && *s != '}') {
while (*s && *s != '}' && s - start < 256) {
int style_index = indexof(MICRODVD_STYLES, *s);
if (style_index >= 0)