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libavutil/base64: Try not to write over the array end

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Michael Niedermayer 2024-05-11 03:13:17 +02:00 committed by Paul B Mahol
parent 8a431bb8c8
commit 77d1200880
1 changed files with 4 additions and 2 deletions
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6
libavutil/base64.c
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@ -127,10 +127,12 @@ validity_check:
}
out3:
*dst++ = v >> 10;
if (end - dst)
*dst++ = v >> 10;
v <<= 2;
out2:
*dst++ = v >> 4;
if (end - dst)
*dst++ = v >> 4;
out1:
out0:
return bits & 1 ? AVERROR_INVALIDDATA : out ? dst - out : 0;