several issues happen on linux (ubuntu 14.04 with kernel 3.18.27)

hbowden / nextgen

A Genetic File, Syscall and Network Fuzzer.

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several issues happen on linux (ubuntu 14.04 with kernel 3.18.27) #2

Closed snorez closed 8 years ago

snorez commented 8 years ago

no compile issues,

when run ./nextgen --syscall --out path with sudo, some libraries can not found. could use absolute path in src/*/Makefile
now ./nextgen could start, but exit with "socket: Too many open files", so I ulimit -n 4096,
a SIGSEGV happens, info stack: strrchr generate_name create_dirpath_pool create_resource_pools setup_resource_module setup_syscall_mode_runtime setup_runtime main

hbowden commented 8 years ago

Sorry for the late reply, but yea I will need to run on Linux as I only test on FreeBSD and Mac OSX as of now.

I will get a fix for not finding the libraries, too many files open, and the SIGSEGV on Linux either tonight or tomorrow.

Running ./nextgen --syscall --out path will not work on Linux because it's not implemented for Linux yet. Try passing ./nextgen --syscall --dumb --out path note the option --dumb that will run nextgen in dumb mode. This will also bypass the crash you are experiencing as that code is not run when using dumb mode.

I will post back here when the fixes have been pushed.

hbowden commented 8 years ago

I fixed the libraries not found bug and the crash bug. I however am not getting the too many open files bug on Debian. I'm in the process of creating an Ubuntu virtual machine and I will see if I can recreate it.

snorez commented 8 years ago

what is the output of ulimit -n, on my machine(ubuntu 14.04 and 16.04), it is 1024.

hbowden commented 8 years ago

On Debian 8.4.0 ulimit -u is 15743 by default which explains why it works on Debian and not Ubuntu. I could change how much files nextgen tries to create on startup on Linux by changing the Macro POOL_SIZE in src/runtime/platform.h but that would increase lock contention and reduce performance so I think the best bet is to inform users via the README that they have to raise the ulimit on Ubuntu and potentially other Linux platforms.

snorez commented 8 years ago

OK, test on Linux Ubuntu 16.04.