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avformat/dhav: Break out of infinite dhav search loop 

Fixes: Infinite loop
Fixes: 26922/clusterfuzz-testcase-minimized-ffmpeg_dem_DHAV_fuzzer-5794549613723648

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7540d60bf6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-11-09 20:42:56 +01:00
parent 10a0989e03
commit be9ba46370
1 changed files with 2 additions and 0 deletions
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2
libavformat/dhav.c
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@ -290,6 +290,8 @@ static int dhav_read_header(AVFormatContext *s)
int seek_back;
seek_back = avio_rl32(s->pb) + 8;
if (seek_back < 9)
break;
dhav->last_good_pos = avio_tell(s->pb);
avio_seek(s->pb, -seek_back, SEEK_CUR);
}