LibAFL QEMU SEGV issue

This repository demonstrates issue with libafl_qemu crashing after target experiences a segfault.

Assuming the supplied devcontainer is used, demonstrating the issue should be simple with:

make

However if built outside of devcontainer, due to differences of compiler the entrypoint and exitpoint parameters in Makefile may need to be altered. These values are intended to be on the call to process_image and the instruction immediately after, e.g. 0x11dc & 0x11e1:

$ objdump -M intel -d targets/vuln_prog_slowinit | grep "main>:" -A40
0000000000001180 <main>:
    1180:       f3 0f 1e fa             endbr64
    1184:       55                      push   rbp
    1185:       53                      push   rbx
...
    11d9:       48 89 ef                mov    rdi,rbp
    11dc:       e8 2f 01 00 00          call   1310 <process_image>
    11e1:       48 8b 44 24 18          mov    rax,QWORD PTR [rsp+0x18]
    11e6:       64 48 2b 04 25 28 00    sub    rax,QWORD PTR fs:0x28
    11ed:       00 00 
...

The fuzzing campaign quickly ends and terminates after a segfault in the target. Sometimes another crash will occur that does not cause the campaign to terminate but a segfault always causes the fuzzing process to end.