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avformat/mov: Check if hoov is at the end

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Fixes: Timeout, probably infinite loop
Fixes: 26559/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5391165484171264

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 0afbaabdca2730d3f8d88719d64802d50b92d351)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-10-25 18:39:45 +01:00
parent 339f357bbc
commit 8a3b513aa7
1 changed files with 2 additions and 0 deletions
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2
libavformat/mov.c
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@ -5709,6 +5709,8 @@ static int mov_read_default(MOVContext *c, AVIOContext *pb, MOVAtom atom)
uint32_t type;
avio_skip(pb, 4);
type = avio_rl32(pb);
if (avio_feof(pb))
break;
avio_seek(pb, -8, SEEK_CUR);
if (type == MKTAG('m','v','h','d') ||
type == MKTAG('c','m','o','v')) {