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Code Issues Releases Activity

avcodec/cfhd: Avoid signed integer overflow in coeff

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Fixes: signed integer overflow: 15244032 * 256 cannot be represented in type 'int'
Fixes: 43504/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_CFHD_fuzzer-4865014842916864

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit cd6ac013a0)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-01-17 14:16:39 +01:00
parent 65d8418e11
commit 447b9a0f03
1 changed files with 2 additions and 2 deletions
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4
libavcodec/cfhd.c
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@ -838,7 +838,7 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
const uint16_t q = s->quantisation;
for (i = 0; i < run; i++) {
*coeff_data |= coeff * 256;
*coeff_data |= coeff * 256U;
*coeff_data++ *= q;
}
} else {
@ -869,7 +869,7 @@ static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
const uint16_t q = s->quantisation;
for (i = 0; i < run; i++) {
*coeff_data |= coeff * 256;
*coeff_data |= coeff * 256U;
*coeff_data++ *= q;
}
} else {