From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.ffmpeg.org (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTPS id B67D24CC0E for ; Fri, 8 Aug 2025 14:01:15 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTP id 7724468CAEE; Fri, 8 Aug 2025 17:01:11 +0300 (EEST) Received: from 0f9ae49ae7c8 (code.ffmpeg.org [188.245.149.3]) by ffbox0-bg.ffmpeg.org (Postfix) with ESMTPS id BFEDD68C7E7 for ; Fri, 8 Aug 2025 17:01:09 +0300 (EEST) MIME-Version: 1.0 From: michaelni To: ffmpeg-devel@ffmpeg.org Subject: [FFmpeg-devel] =?utf-8?q?=5BPATCH=5D_avcodec/ilbcdec=3A_Clear_cb?= =?utf-8?q?vec_when_used_with_create=5Faugmented=5Fvector=28=29_=28PR_=232?= =?utf-8?q?0178=29?= X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Message-Id: <20250808140111.7724468CAEE@ffbox0-bg.ffmpeg.org> Date: Fri, 8 Aug 2025 17:01:11 +0300 (EEST) Archived-At: List-Archive: List-Post: PR #20178 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20178 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20178.patch Fixes: use of uninitialized memory Fixes: 42538134/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-6322020827070464 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer >From eeef95e0999d2230361315b67620f81a4e370cbb Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 8 Aug 2025 15:03:56 +0200 Subject: [PATCH] avcodec/ilbcdec: Clear cbvec when used with create_augmented_vector() Fixes: use of uninitialized memory Fixes: 42538134/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-6322020827070464 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/ilbcdec.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/ilbcdec.c b/libavcodec/ilbcdec.c index a9dfa857a2..b218ca323a 100644 --- a/libavcodec/ilbcdec.c +++ b/libavcodec/ilbcdec.c @@ -675,6 +675,7 @@ static void get_codebook(int16_t * cbvec, /* (o) Constructed codebook vector * /* get vector */ memcpy(cbvec, mem + lMem - k, cbveclen * 2); } else if (index < base_size) { + memset(cbvec, 0, cbveclen*2); /* Calculate lag */ @@ -701,6 +702,7 @@ static void get_codebook(int16_t * cbvec, /* (o) Constructed codebook vector * filter_mafq12(&mem[memIndTest + 4], cbvec, kCbFiltersRev, CB_FILTERLEN, cbveclen); } else { + memset(cbvec, 0, cbveclen*2); /* interpolated vectors */ /* Stuff zeros outside memory buffer */ memIndTest = lMem - cbveclen - CB_FILTERLEN; -- 2.49.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".