[FFmpeg-cvslog] tools/target_dec_fuzzer: consider potential padding/edge in pixel threshold

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Wed Sep  4 14:24:48 2019 +0200| [59163731e992b113171d312110be8dd059b4f88a] | committer: Michael Niedermayer

tools/target_dec_fuzzer: consider potential padding/edge in pixel threshold

Fixes: Timeout (73sec ->30ms)
Fixes: 16921/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5689384594046976

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=59163731e992b113171d312110be8dd059b4f88a
---

 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 5c0a9db5c3..ba45b6ac05 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -259,7 +259,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
             av_frame_unref(frame);
             int ret = decode_handler(ctx, frame, &got_frame, &avpkt);
 
-            ec_pixels += ctx->width * ctx->height;
+            ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL);
             if (it > 20 || ec_pixels > 4 * ctx->max_pixels)
                 ctx->error_concealment = 0;
             if (ec_pixels > maxpixels)