The provided backtrace indicates a crash in your program, likely due to a segmentation fault or an invalid memory access. Here's a breakdown of the key points: 1. **Crash Context**: - The crash occurs in `libFuzzer`, which is part of the Fuchsia Fuzzer (LLVMFUZZ). - It mentions that `libFuzzer` has rudimentary signal handlers and suggests combining it with AddressSanitizer for better crash reports. 2. **Backtrace Analysis**: - The backtrace shows a series of function calls leading to the crash, starting from `qemu_readl` in `videzzo_qemu.c` (line 1037) and propagating through various functions like `dispatch_mmio_read`, `videzzo_dispatch_event`, etc. - The final call stack includes `_start`, which is the entry point of the program. 3. **Crash Symptoms**: - The crash occurs during fuzzing, as indicated by the use of `libFuzzer`. - The provided binary data (hexadecimal and ASCII) represents the input that caused the crash. This can be useful for debugging if you want to reproduce the issue. 4. **Recommendations**: - **Use AddressSanitizer**: To get more detailed information about the crash, such as which memory address was accessed or written incorrectly. - **Reproduce the Crash**: Use the provided input data to try and reproduce the crash in a controlled environment. - **Check Memory Access**: Ensure that all memory accesses in your code are valid and properly bounds-checked. If you need further assistance, please provide additional details about the codebase or specific functions involved.