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avcodec/dpx: Move need_align to act per line

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Fixes out of array read
Fixes: 61cf123c081ee2bb774d307c75bdb99e/asan_heap-oob_1224f76_5546_bee833ffae73f752b489b9eeaac52db7.dpx

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit c8aaae8e0f1519bc99bd717ea3067c9cfdb68def)

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-14 14:29:02 +01:00
parent 1c73f9d84c
commit 7ab1f5b0d4
1 changed files with 2 additions and 2 deletions
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4
libavcodec/dpx.c
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@ -348,11 +348,11 @@ static int decode_frame(AVCodecContext *avctx,
// For 12 bit, ignore alpha
if (elements == 4)
buf += 2;
// Jump to next aligned position
buf += need_align;
}
for (i = 0; i < 3; i++)
ptr[i] += p->linesize[i];
// Jump to next aligned position
buf += need_align;
}
break;
case 16: