The max number of errors and number of output bytes are limited

Revert commits ce910566 and 33b9a4a7, disable tool_flac fuzzer for
i386 ASAN because weird bugs keep popping up

This commit adds the capability to find the end of a link through
seeking instead of by reading forward, which should be much more
efficient. It also exposes this capability through the new API
function FLAC__stream_decoder_skip_single_link

This commit includes additions to the test suite and fuzzers

philippe44 authored 6 months ago and Martijn van Beurden committed 5 months ago

Co-authored-by: Martijn van Beurden <mvanb1@gmail.com>

The seed corpus had a file that was supposed to cover replaygain
synthesis, but didn't have any replaygain tags. Because of the
fixed format of these tags, they aren't reasonbly reachable by
fuzzing without help

This option has been deprecated since FLAC 1.3.0.

Up until now, only libFLAC was being fuzzed. This commit adds a
fuzzer capable of fuzzing most code of the flac executable

Fixes out-of-bounds access

Credit: Oss-Fuzz

Now fuzzer_encoder_v2 has been running for quite some time and no
big (encoder) projects are coming, fuzzer_encoder is changed. This
will invalidate the current corpus which will take time to rebuild,
but I think this is a good moment to do so.

Whereas in C vorbis comment fields are in an array, C++ actually
validates the comment before returning it. This means it needs a
little more checking.