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avcodec/libtheoraenc: make keyframe mask unsigned and handle its larger range

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Fixes: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 473579864/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LIBTHEORA_fuzzer-5835688160591872

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2026-02-21 22:43:41 +00:00
committed by michaelni
parent ca011ee754
commit c98346ffaa
1 changed files with 2 additions and 2 deletions
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libavcodec/libtheoraenc.c
+2 -2
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@@ -53,7 +53,7 @@ typedef struct TheoraContext {
int stats_offset;
int uv_hshift;
int uv_vshift;
int keyframe_mask;
unsigned keyframe_mask;
int speed_level;
} TheoraContext;
@@ -249,7 +249,7 @@ static av_cold int encode_init(AVCodecContext* avc_context)
return AVERROR_EXTERNAL;
}
h->keyframe_mask = (1 << av_ceil_log2(avc_context->gop_size)) - 1;
h->keyframe_mask = (1U << av_ceil_log2(avc_context->gop_size)) - 1;
/* Clear up theora_info struct */
th_info_clear(&t_info);