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[FFmpeg-devel,2/4] avcodec/utvideoenc: Use unsigned shift to build flags

Message ID 20240620193504.2310780-2-michael@niedermayer.cc
State New
Headers show
Series [FFmpeg-devel,1/4] avcodec/j2kenc: Merge dwt_norm into lambda | expand

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Commit Message

Michael Niedermayer June 20, 2024, 7:35 p.m. UTC 
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(-)
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Patch

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;