tools/target_dec_fuzzer: Also fuzz keyframe & disposal flags
authorMichael Niedermayer <michael@niedermayer.cc>
Sat, 12 Oct 2019 20:34:03 +0000 (22:34 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Tue, 15 Oct 2019 15:09:22 +0000 (17:09 +0200)
This should improve coverage

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
tools/target_dec_fuzzer.c

index 0047c9e..38e085b 100644 (file)
@@ -109,6 +109,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
                           int *got_picture_ptr,
                           const AVPacket *avpkt) = NULL;
     AVCodecParserContext *parser = NULL;
+    uint64_t keyframes = 0;
 
 
     if (!c) {
@@ -191,6 +192,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         ctx->channels                           = (unsigned)bytestream2_get_le32(&gbc) % FF_SANE_NB_CHANNELS;
         ctx->block_align                        = bytestream2_get_le32(&gbc);
         ctx->codec_tag                          = bytestream2_get_le32(&gbc);
+        keyframes                               = bytestream2_get_le64(&gbc);
 
         if (extradata_size < size) {
             ctx->extradata = av_mallocz(extradata_size + AV_INPUT_BUFFER_PADDING_SIZE);
@@ -236,6 +238,8 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
         if (res < 0)
             error("Failed memory allocation");
         memcpy(parsepkt.data, last, data - last);
+        parsepkt.flags = (keyframes & 1) * AV_PKT_FLAG_DISCARD + (!!(keyframes & 2)) * AV_PKT_FLAG_KEY;
+        keyframes = (keyframes >> 2) + (keyframes<<62);
         data += sizeof(fuzz_tag);
         last = data;