From 3fa5039012d32a96f136fb116a0f825ea134cded Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 5 Aug 2023 14:35:55 +0200 Subject: [PATCH] avcodec/tta: fix signed overflow in decorrelate Fixes: signed integer overflow: 2079654542 - -139267653 cannot be represented in type 'int' Fixes: 60811/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TTA_fuzzer-5915858409750528 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 283bf5c35bc5ac92e061f27c3a680318175a1600) Signed-off-by: Michael Niedermayer --- libavcodec/tta.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/tta.c b/libavcodec/tta.c index 3e89571f16..072e86729d 100644 --- a/libavcodec/tta.c +++ b/libavcodec/tta.c @@ -342,7 +342,7 @@ static int tta_decode_frame(AVCodecContext *avctx, AVFrame *frame, if (s->channels > 1) { int32_t *r = p - 1; for (*p += *r / 2; r > (int32_t*)p - s->channels; r--) - *r = *(r + 1) - *r; + *r = *(r + 1) - (unsigned)*r; } cur_chan = 0; i++;