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no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PR] avcodec/libtheoraenc: make keyframe mask unsigned and handle its larger range (PR #22244) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: michaelni via ffmpeg-devel Cc: michaelni Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: PR #22244 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22244 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22244.patch 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 >>From 1e59c4baa432681ed15944039672425e98421e36 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 21 Feb 2026 02:12:03 +0100 Subject: [PATCH] avcodec/libtheoraenc: make keyframe mask unsigned and handle its larger range 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 --- libavcodec/libtheoraenc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/libtheoraenc.c b/libavcodec/libtheoraenc.c index 2b70ec06a6..e089fe8f5b 100644 --- a/libavcodec/libtheoraenc.c +++ b/libavcodec/libtheoraenc.c @@ -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); -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org