[FFmpeg-devel] [PATCH 5/6] tools/target_dec_fuzzer: Use av_buffer_allocz() to avoid missing slices to have unpredictable content

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 5/6] tools/target_dec_fuzzer: Use av_buffer_allocz() to avoid missing slices to have unpredictable content
Date: Wed,  7 Aug 2024 00:18:52 +0200
Message-ID: <20240806221853.959177-5-michael@niedermayer.cc> (raw)
In-Reply-To: <20240806221853.959177-1-michael@niedermayer.cc>

Fixes: use of uninitialized values
Fixes: 70885/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP6F_fuzzer-4610946029387776 (and likely others)

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 tools/target_dec_fuzzer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index d2d7e21dac7..794b5b92cc7 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -129,7 +129,7 @@ static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
 
     frame->extended_data = frame->data;
     for (i = 0; i < 4 && size[i]; i++) {
-        frame->buf[i] = av_buffer_alloc(size[i]);
+        frame->buf[i] = av_buffer_allocz(size[i]);
         if (!frame->buf[i])
             goto fail;
         frame->data[i] = frame->buf[i]->data;
-- 
2.45.2

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