ret2csu seems broken

[JHeinzde]

If I try your example for ret2libcsu I get a syntax error:

Traceback (most recent call last):
  File "/home/jonathan/Projekte/CTF/uiuctf/./exploit.py", line 38, in <module>
    main()
  File "/home/jonathan/Projekte/CTF/uiuctf/./exploit.py", line 28, in main
    r.ret2csu(1, 2, 3, 4, 5, call=0xdeadbeef)
  File "/home/jonathan/.local/lib/python3.9/site-packages/pwnlib/rop/rop.py", line 1458, in ret2csu
    if elf.pie:
UnboundLocalError: local variabe 'elf' referenced before assignment

The offending code in rop.py looks like this:

        exes = (elf for elf in self.elfs if not elf.library and elf.bits == 64)
        if not exes:
            log.error('No non-library binaries in [elfs]')

        nonpie = csu = None
        for elf in exes:
            if not elf.pie:
                if '__libc_csu_init' in elf.symbols:
                    break
                nonpie = elf
            elif '__libc_csu_init' in elf.symbols:
                csu = elf

        if elf.pie:
            if nonpie:
                elf = nonpie
            elif csu:
                elf = csu

        from .ret2csu import ret2csu
        ret2csu(self, elf, edi, rsi, rdx, rbx, rbp, r12, r13, r14, r15, call)

I dont think that this is right since elf is never referenced before the if condition (it is in the for loop but the if is not inside the for loop).