ffmpeg | branch: master | Michael Niedermayer <michael@niedermayer.cc> | Sat Oct 2 23:08:14 2021 +0200| [76c41a5bfeceb6d4a5c656abe41791f08c3b011c] | committer: Michael Niedermayer tools/target_dec_fuzzer: Disable MB debug after a few iterations This debug code can be quite slow on constructed streams Fixes: Timeout Fixes: 38907/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-6334628852531200 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=76c41a5bfeceb6d4a5...

tools/target_dec_fuzzer.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c index 1a790f6642..15466a76d5 100644 --- a/tools/target_dec_fuzzer.c +++ b/tools/target_dec_fuzzer.c @@ -392,8 +392,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { decode_more = ret >= 0; if(!decode_more) { ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL); - if (it > 20 || ec_pixels > 4 * ctx->max_pixels) + if (it > 20 || ec_pixels > 4 * ctx->max_pixels) { ctx->error_concealment = 0; + ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE); + } if (ec_pixels > maxpixels) goto maximums_reached; } @@ -406,8 +408,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { int ret = decode_handler(ctx, frame, &got_frame, avpkt); ec_pixels += (ctx->width + 32LL) * (ctx->height + 32LL); - if (it > 20 || ec_pixels > 4 * ctx->max_pixels) + if (it > 20 || ec_pixels > 4 * ctx->max_pixels) { ctx->error_concealment = 0; + ctx->debug &= ~(FF_DEBUG_SKIP | FF_DEBUG_QP | FF_DEBUG_MB_TYPE); + } if (ec_pixels > maxpixels) goto maximums_reached;