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avcodec/iff: warn about truncated input to decode_byterun() and clear remaining output

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Fixes use of uninitialized memory
Fixes: msan_uninit-mem_7fe205e395ed_8988_test.iff
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-19 20:48:51 +01:00
parent 5eeeb4abf9
commit b3f44eafa5
1 changed files with 4 additions and 0 deletions
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4
libavcodec/iff.c
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@ -499,6 +499,10 @@ static int decode_byterun(uint8_t *dst, int dst_size,
}
x += length;
}
if (x < dst_size) {
av_log(NULL, AV_LOG_WARNING, "decode_byterun ended before plane size\n");
memset(dst+x, 0, dst_size - x);
}
return buf - buf_start;
}