From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 233334553C for ; Tue, 2 May 2023 15:38:45 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id F065D68C188; Tue, 2 May 2023 18:38:29 +0300 (EEST) Received: from relay11.mail.gandi.net (relay11.mail.gandi.net [217.70.178.231]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 9DF8768C17B for ; Tue, 2 May 2023 18:38:23 +0300 (EEST) Received: (Authenticated sender: michael@niedermayer.cc) by mail.gandi.net (Postfix) with ESMTPSA id D698B10000C for ; Tue, 2 May 2023 15:38:22 +0000 (UTC) From: Michael Niedermayer To: FFmpeg development discussions and patches Date: Tue, 2 May 2023 17:38:20 +0200 Message-Id: <20230502153820.32234-3-michael@niedermayer.cc> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230502153820.32234-1-michael@niedermayer.cc> References: <20230502153820.32234-1-michael@niedermayer.cc> Subject: [FFmpeg-devel] [PATCH 3/3] avcodec/pdvdec: Check previous frame before using it 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 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: Fixes: load of null pointer of type 'uint8_t' (aka 'unsigned char') Fixes: 58256/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PDV_fuzzer-4776436325285888 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/pdvdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/pdvdec.c b/libavcodec/pdvdec.c index b1fc19b1c9..605af78050 100644 --- a/libavcodec/pdvdec.c +++ b/libavcodec/pdvdec.c @@ -93,7 +93,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame, return AVERROR_INVALIDDATA; } - if (!(avpkt->flags & AV_PKT_FLAG_KEY)) { + if (prev && !(avpkt->flags & AV_PKT_FLAG_KEY)) { for (int j = 0; j < (avctx->width + 7) >> 3; j++) dst[j] ^= prev[j]; prev += prev_frame->linesize[0]; -- 2.17.1 _______________________________________________ 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".