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Fri, 13 Feb 2026 02:58:23 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Fri, 13 Feb 2026 00:58:23 -0000 Message-ID: <177094430406.25.1845890635775757772@009cbcb3d8cd> Message-ID-Hash: K7EBCDYX5APIM3Y4YQDR2VJRO3FAGNEK X-Message-ID-Hash: K7EBCDYX5APIM3Y4YQDR2VJRO3FAGNEK X-MailFrom: code@ffmpeg.org X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; 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/prores_raw: Tiles of width less than 16 result in undefined behavior (PR #21742) 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 #21742 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21742 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21742.patch Fixes: passing zero to __builtin_clz(), which is not a valid argument Fixes: 471569982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PRORES_RAW_DEC_fuzzer-5832576221904896 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer >>From 40fb893468b8bf2076f3687714f7586eb4ae77c1 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 13 Feb 2026 00:06:26 +0100 Subject: [PATCH] avcodec/prores_raw: Tiles of width less than 16 result in undefined behavior Fixes: passing zero to __builtin_clz(), which is not a valid argument Fixes: 471569982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PRORES_RAW_DEC_fuzzer-5832576221904896 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/prores_raw.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/prores_raw.c b/libavcodec/prores_raw.c index eb1a9af14f..d852d40d64 100644 --- a/libavcodec/prores_raw.c +++ b/libavcodec/prores_raw.c @@ -251,6 +251,8 @@ static int decode_tile(AVCodecContext *avctx, TileContext *tile, if (tile->x >= avctx->width) return 0; + if (avctx->width - tile->x < 16) + return AVERROR_PATCHWELCOME; /* Tile header */ int header_len = bytestream2_get_byteu(gb) >> 3; -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org