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avformat/avidec: Use 64bit for frame number in odml index parsing 

Fixes: signed integer overflow: 1179337772 + 1392508928 cannot be represented in type 'int'
Fixes: 34088/clusterfuzz-testcase-minimized-ffmpeg_dem_AVI_fuzzer-5846945303232512

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 2021-05-11 18:54:53 +02:00
parent 104a8399ae
commit a4c98c507e
1 changed files with 2 additions and 2 deletions
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4
libavformat/avidec.c
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@ -164,7 +164,7 @@ static int get_riff(AVFormatContext *s, AVIOContext *pb)
return 0;
}
static int read_odml_index(AVFormatContext *s, int frame_num)
static int read_odml_index(AVFormatContext *s, int64_t frame_num)
{
AVIContext *avi = s->priv_data;
AVIOContext *pb = s->pb;
@ -184,7 +184,7 @@ static int read_odml_index(AVFormatContext *s, int frame_num)
av_log(s, AV_LOG_TRACE,
"longs_per_entry:%d index_type:%d entries_in_use:%d "
"chunk_id:%X base:%16"PRIX64" frame_num:%d\n",
"chunk_id:%X base:%16"PRIX64" frame_num:%"PRId64"\n",
longs_per_entry,
index_type,
entries_in_use,