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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>
(cherry picked from commit 2d216566f258badd07bc58de1e089b6e4175dc46)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-05-11 03:13:17 +02:00
parent 559dd6f68a
commit b9985f105e
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GPG Key ID: B18E8928B3948D64
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: out3:
*dst++ = v >> 10; if (end - dst)
*dst++ = v >> 10;
v <<= 2; v <<= 2;
out2: out2:
*dst++ = v >> 4; if (end - dst)
*dst++ = v >> 4;
out1: out1:
out0: out0:
return bits & 1 ? AVERROR_INVALIDDATA : out ? dst - out : 0; return bits & 1 ? AVERROR_INVALIDDATA : out ? dst - out : 0;