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tools/target_dec_fuzzer: Use av_buffer_allocz() to avoid missing slices to have unpredictable content 

This matches production code which also zeros these buffers

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>
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Michael Niedermayer 2024-08-07 00:18:52 +02:00
parent cda5f5c5ed
commit 1b8d95da3a
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1 changed files with 1 additions and 1 deletions
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tools/target_dec_fuzzer.c
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@ -129,7 +129,7 @@ static int fuzz_video_get_buffer(AVCodecContext *ctx, AVFrame *frame)
frame->extended_data = frame->data; frame->extended_data = frame->data;
for (i = 0; i < 4 && size[i]; i++) { 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]) if (!frame->buf[i])
goto fail; goto fail;
frame->data[i] = frame->buf[i]->data; frame->data[i] = frame->buf[i]->data;