diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-23 18:54:51 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-24 22:38:55 +0200 |
| commit | 6e64d89410c1833a240f4ff3ea47e8786ea49b79 (patch) | |
| tree | 3ff6ca17c183148f317e040783384e1a4eab3528 /tools/target_dem_fuzzer.c | |
| parent | b990148d1e6dcfed7fc0a5d2d0d7f636fcf9896b (diff) | |
tools/target_dem_fuzzer: Limit max blocks
With a IO block size of 1 byte potentially megabytes are quite slow to read, thus
limit the number
Fixes: 26511/clusterfuzz-testcase-minimized-ffmpeg_dem_NUV_fuzzer-5679249073373184
Fixes: 26517/clusterfuzz-testcase-minimized-ffmpeg_dem_XMV_fuzzer-6316634501021696
Fixes: 26518/clusterfuzz-testcase-minimized-ffmpeg_dem_WSVQA_fuzzer-485568285324083
Fixes: 26525/clusterfuzz-testcase-minimized-ffmpeg_dem_MSNWC_TCP_fuzzer-5121987011411968
Fixes: 26538/clusterfuzz-testcase-minimized-ffmpeg_dem_DHAV_fuzzer-5441800598454272
Fixes: OOM
Fixes: Timeout
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'tools/target_dem_fuzzer.c')
| -rw-r--r-- | tools/target_dem_fuzzer.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/target_dem_fuzzer.c b/tools/target_dem_fuzzer.c index 8c9e373367..6f4f062f13 100644 --- a/tools/target_dem_fuzzer.c +++ b/tools/target_dem_fuzzer.c @@ -86,6 +86,7 @@ static int64_t io_seek(void *opaque, int64_t offset, int whence) // Ensure we don't loop forever const uint32_t maxiteration = 8096; +const int maxblocks= 100000; static const uint64_t FUZZ_TAG = 0x4741542D5A5A5546ULL; @@ -158,6 +159,10 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { av_strlcatf(filename, sizeof(filename), ".%s", extension); } } + + if (!io_buffer_size || size / io_buffer_size > maxblocks) + io_buffer_size = size; + io_buffer = av_malloc(io_buffer_size); if (!io_buffer) error("Failed to allocate io_buffer"); |