From d5fc57fb795044d16c5d0cc3a13fc92ad9293eff Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 8 Aug 2025 23:19:03 +0200 Subject: [PATCH] avcodec/scpr3: Clear clr clr is passing into decode_run_p() its not used when not set but this possibly triggers msan (it doesnt locally) Fixes?: use of uninintialized memory Fixes?: 436997807/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SCPR_fuzzer-6253316466606080 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 354226037646d44701f0f2a84749fb2ea303f043) Signed-off-by: Michael Niedermayer --- libavcodec/scpr3.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/scpr3.c b/libavcodec/scpr3.c index e91c198308..369d2653c2 100644 --- a/libavcodec/scpr3.c +++ b/libavcodec/scpr3.c @@ -1167,7 +1167,7 @@ static int decompress_p3(AVCodecContext *avctx, } } else { int run, bx = x * 16 + sx1, by = y * 16 + sy1; - uint32_t clr, ptype = 0, r, g, b; + uint32_t clr = 0, ptype = 0, r, g, b; if (bx >= avctx->width) return AVERROR_INVALIDDATA;