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avcodec/xwddec: Check bpp more completely

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Fixes out of array access
Fixes: 1399/clusterfuzz-testcase-minimized-4866094172995584

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-07 18:50:49 +02:00
parent a5e0dbf530
commit 441026fcb1
1 changed files with 2 additions and 2 deletions
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4
libavcodec/xwddec.c
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@ -157,9 +157,9 @@ static int xwd_decode_frame(AVCodecContext *avctx, void *data,
case XWD_GRAY_SCALE:
if (bpp != 1 && bpp != 8)
return AVERROR_INVALIDDATA;
if (pixdepth == 1) {
if (bpp == 1 && pixdepth == 1) {
avctx->pix_fmt = AV_PIX_FMT_MONOWHITE;
} else if (pixdepth == 8) {
} else if (bpp == 8 && pixdepth == 8) {
avctx->pix_fmt = AV_PIX_FMT_GRAY8;
}
break;