From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 2/4] avcodec/utvideoenc: Use unsigned shift to build flags
Date: Thu, 20 Jun 2024 21:35:02 +0200
Message-ID: <20240620193504.2310780-2-michael@niedermayer.cc> (raw)
In-Reply-To: <20240620193504.2310780-1-michael@niedermayer.cc>
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 <michael@niedermayer.cc>
---
libavcodec/utvideoenc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/utvideoenc.c b/libavcodec/utvideoenc.c
index 59e198458b0..b35b34d5a1b 100644
--- a/libavcodec/utvideoenc.c
+++ b/libavcodec/utvideoenc.c
@@ -239,7 +239,7 @@ static av_cold int utvideo_encode_init(AVCodecContext *avctx)
* - 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;
--
2.45.2
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next prev parent reply other threads:[~2024-06-20 19:35 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-20 19:35 [FFmpeg-devel] [PATCH 1/4] avcodec/j2kenc: Merge dwt_norm into lambda Michael Niedermayer
2024-06-20 19:35 ` Michael Niedermayer [this message]
2024-06-20 19:35 ` [FFmpeg-devel] [PATCH 3/4] avcodec/mpeg12enc: Use av_rescale() in vbv_buffer_size computation Michael Niedermayer
2024-06-20 19:35 ` [FFmpeg-devel] [PATCH 4/4] avcodec/mpegvideo_enc: Do not duplicate pictures on shifting Michael Niedermayer
2024-07-14 23:02 ` Michael Niedermayer
2024-06-21 9:38 ` [FFmpeg-devel] [PATCH 1/4] avcodec/j2kenc: Merge dwt_norm into lambda Andreas Rheinhardt
2024-06-21 21:09 ` Michael Niedermayer
2024-07-16 13:25 ` Michael Niedermayer
2024-06-23 22:48 ` Sean McGovern
2024-07-16 13:26 ` Michael Niedermayer
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