From 0ecda4fbce8e77152e9b450c4efa8c1b81c8982e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 9 Apr 2023 14:48:37 +0200 Subject: [PATCH] avcodec/rka: Fix signed integer overflow in decode_filter() Fixes: signed integer overflow: -631553 * 32768 cannot be represented in type 'int' Fixes: 57814/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RKA_fuzzer-4614661233573888 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/rka.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/rka.c b/libavcodec/rka.c index 2212e3f930..3e86d83819 100644 --- a/libavcodec/rka.c +++ b/libavcodec/rka.c @@ -737,7 +737,7 @@ static int decode_filter(RKAContext *s, ChContext *ctx, ACoder *ac, int off, uns } ctx->buf0[off] = ctx->buf1[off] + ctx->buf0[off + -1]; } else { - val *= 1 << ctx->cmode; + val *= 1U << ctx->cmode; sum += ctx->buf0[off + -1] + val; switch (s->bps) { case 16: sum = av_clip_int16(sum); break;