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avcodec/cfhd: Check idwt_buf size before allocation

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Fixes: OOM
Fixes: 428760799/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CFHD_DEC_fuzzer-5685176435015680

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2025-07-15 22:19:24 +02:00
parent f7a6965308
commit 2d72bf6fe0
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1 changed files with 4 additions and 0 deletions
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4
libavcodec/cfhd.c
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@ -25,6 +25,7 @@
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
@ -266,6 +267,9 @@ static int alloc_buffers(AVCodecContext *avctx)
int height = (i || bayer) ? s->coded_height >> chroma_y_shift : s->coded_height;
ptrdiff_t stride = (FFALIGN(width / 8, 8) + 64) * 8;
if ((ret = av_image_check_size2(stride, height, avctx->max_pixels, s->coded_format, 0, avctx)) < 0)
return ret;
if (chroma_y_shift && !bayer)
height = FFALIGN(height / 8, 2) * 8;
s->plane[i].width = width;