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Sat, 14 Feb 2026 03:47:17 +0200 (EET) MIME-Version: 1.0 To: ffmpeg-devel@ffmpeg.org Date: Sat, 14 Feb 2026 01:47:16 -0000 Message-ID: <177103363722.25.12641440695840904237@009cbcb3d8cd> Message-ID-Hash: 4HTF6AYG5RTHAQSQRG3KX2SDAIOEDZL5 X-Message-ID-Hash: 4HTF6AYG5RTHAQSQRG3KX2SDAIOEDZL5 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/adpcm: fix integer overflow in N64 (PR #21753) 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 #21753 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21753 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21753.patch Fixes: signed integer overflow: 1077919680 + 1077936128 cannot be represented in type 'int' Fixes: 471686763/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_N64_DEC_fuzzer-6493712281829376 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer >>From a802ef96e5e6e96976c5443f81fd92f06f8bb540 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 14 Feb 2026 01:32:40 +0100 Subject: [PATCH] avcodec/adpcm: fix integer overflow in N64 Fixes: signed integer overflow: 1077919680 + 1077936128 cannot be represented in type 'int' Fixes: 471686763/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ADPCM_N64_DEC_fuzzer-6493712281829376 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/adpcm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c index 8ddca46b67..1502a5cb04 100644 --- a/libavcodec/adpcm.c +++ b/libavcodec/adpcm.c @@ -2688,7 +2688,8 @@ static int adpcm_decode_frame(AVCodecContext *avctx, AVFrame *frame, int16_t *sf_out = &out[j*8]; for (int i = 0; i < 8; i++) { - int sample, delta = 0; + int sample; + unsigned delta = 0; for (int o = 0; o < order; o++) delta += coefs[o*8 + i] * hist[(8 - order) + o]; @@ -2699,7 +2700,7 @@ static int adpcm_decode_frame(AVCodecContext *avctx, AVFrame *frame, } sample = sf_codes[i] * 2048; - sample = (sample + delta) / 2048; + sample = (int)(sample + delta) / 2048; sample = av_clip_int16(sample); sf_out[i] = sample; } -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org