Index out of bounds error

[bendrissou]

Hi,

Increasing the bitmap size in configuration file config.ron leads to a crash:

[2024-10-12] 16:53:37 Starting Fuzzing...
thread 'fuzzer_1' panicked at fuzzer/src/fuzzer.rs:344:17:
index out of bounds: the len is 65536 but the index is 65536
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'main' panicked at fuzzer/src/main.rs:489:44:
RAND_2698731594: Any { .. }

After some debugging it turns out that the value 65536 is hardcoded within Nautilus:

return (shm_id, trace_bits as *mut [u8; 1 << 16]);

The array size is fixed here, and is not set by configurations. The mismatch between the hardcoded value 1 << 16 and the expected value from config.ron leads to the error.