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avformat/vividas: Use equals check with n in read_sb_block()

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Fixes: OOM
Fixes: 27780/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5097985075314688

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 e44214a8242bc12fa2c86fcc8b0abd2053f1c8f9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-02-15 21:29:11 +01:00
parent f6fdd11125
commit a64e178277
1 changed files with 1 additions and 1 deletions
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2
libavformat/vividas.c
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@ -267,7 +267,7 @@ static uint8_t *read_sb_block(AVIOContext *src, unsigned *size,
*size = n; *size = n;
n -= 8; n -= 8;
if (avio_read(src, buf+8, n) < n) { if (avio_read(src, buf+8, n) != n) {
av_free(buf); av_free(buf);
return NULL; return NULL;
} }