From b230ab82872ff9a3049c993553fa9e7e447c0a7c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 19 Jun 2024 23:55:01 +0200 Subject: [PATCH] avcodec/utvideoenc: Use unsigned shift to build flags Fixes: left shift of 255 by 24 places cannot be represented in type 'int' Fixes: 69083/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_UTVIDEO_fuzzer-5608202363273216 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 69e90491f15d8eef643f8dfd1b75805829496678) Signed-off-by: Michael Niedermayer --- libavcodec/utvideoenc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/utvideoenc.c b/libavcodec/utvideoenc.c index db00e1eff5..476cf3819b 100644 --- a/libavcodec/utvideoenc.c +++ b/libavcodec/utvideoenc.c @@ -233,7 +233,7 @@ FF_ENABLE_DEPRECATION_WARNINGS * - Compression mode (none/huff) * And write the flags. */ - c->flags = (c->slices - 1) << 24; + c->flags = (c->slices - 1U) << 24; c->flags |= 0 << 11; // bit field to signal interlaced encoding mode c->flags |= c->compression;