Getting the GNU gdbserver to work

A number of the remaining reported ptrace(2) bugs are GDB related. The previous support for GDB in NetBSD was in need for refreshment, as it had no support for gdbserver capabilities. The GDB Server is an execution mode of the debugger, which spawns a dedicated process that interacts with its tracee. The process then establishes a link (socket, serial, ...) with the GDB client that is controlled by a programmer.

As NetBSD-9 has finally branched and I keep receiving requests to finish the integration of LLVM sanitizers, I have pushed this task forward too. I have also completed a few leftover tasks from my previous months that still needed fixes.[Read More] [0 comments]

 

Fuzzing NetBSD Filesystems via AFL. [Part 2]

This report was written by Maciej Grochowski as a part of developing the AFL+KCOV project.

Recently I started working on Fuzzing Filesystems on NetBSD using AFL.
You can take a look at the previous post to learn more details about background of this project.
This post summarizes the work that has been done in this area, and is divided into 3 sections:

1. Porting AFL kernel mode to work with NetBSD
2. Running kernel fuzzing benchmark
3. Example howto fuzzing particular Filesystem

[Read More] [0 comments]

 

GSoC 2019 Report: Adding NetBSD KNF to clang-format, Part 2

This report was prepared by Manikishan Ghantasala as a part of Google Summer of Code 2019

This report encloses the progress of the project Add KNF (NetBSD style) clang-format configuration during the second coding period of GSoC 2019.

Clang-format

Clang-format is a powerful code formatter which is a part of clang. Clang-format formats the code either by a configuration file .clang-format or can be chosen from some predefined coding styles namely LLVM, Google, Chromium, Mozilla, WebKit.

The final goal of the project is to add a new style NetBSD along with them by patching the libFormat to support the missing styles and add the configuration according to NetBSD KNF.

clang-format -style=NetBSD [Read More] [0 comments]

 

GSoC 2019 Report Update: Incorporating the memory-hard Argon2 hashing scheme into NetBSD

This report was prepared by Jason High as a part of Google Summer of Code 2019 [Read More] [0 comments]

 

Work-in-progress threading support in LLDB

Upstream describes LLDB as a next generation, high-performance debugger. It is built on top of LLVM/Clang toolchain, and features great integration with it. At the moment, it primarily supports debugging C, C++ and ObjC code, and there is interest in extending it to more languages.

In February, I have started working on LLDB, as contracted by the NetBSD Foundation. So far I've been working on reenabling continuous integration, squashing bugs, improving NetBSD core file support, extending NetBSD's ptrace interface to cover more register types and fix compat32 issues, and lately fixing watchpoint support. You can read more about that in my June 2019 report.

My July's work has been focused on improving support for NetBSD threads in LLDB. This involved a lot of debugging and fighting hanging tests, and I have decided to delay committing the results until I manage to provide fixes for all the immediate issues.

[Read More] [0 comments]

 

Enchancing Syzkaller Support for NetBSD, Part 2

Prepared by Siddharth Muralee(@R3x) as a part of Google Summer of Code’19

As a part of Google Summer of Code’19, I am working on improving the support for Syzkaller kernel fuzzer. Syzkaller is an unsupervised coverage-guided kernel fuzzer, that supports a variety of operating systems including NetBSD. This report details the work done during the second coding period.

You can also take a look at the first report to learn more about the initial support that we added.

[Read More] [0 comments]

 

Adapting TriforceAFL for NetBSD, Part 2

Prepared by Akul Pillai as part of GSoC 2019.

I have been working on adapting TriforceAFL for NetBSD kernel syscall fuzzing. This blog post summarizes the work done until the second evaluation.

For work done during the first coding period, check out this post.

[Read More] [2 comments]

 

Porting wine to amd64 on NetBSD, second evaluation report

This report was written by Naveen Narayanan as part of Google Summer of Code 2019.

This report encompasses the progress of the project during the second coding period.

As getting Wine to work with WoW64 support was of foremost importance, my focus was on compat32 dependency packages without which Wine's functionality would be limited and more importantly untestable. Initially, being unaware of what to expect, I just wanted Wine to run, at the earliest. So, with outmost support from mentors, the consensus was to install libs from 32-bit packages to ${PREFIX}/lib/32 and ignore everything else that came with the respective packages.

[Read More] [0 comments]

 

NetBSD 9.0 release process has started

NetBSD-9 has been branched, with support for AArch64, a new hypervisor, and support for newer machines. Binaries are available, please test them and let us know of any bugs!

[Read More] [6 comments]

 

GSoC 2019 Report: Incorporating the memory-hard Argon2 hashing scheme into NetBSD

This report was prepared by Jason High as a part of Google Summer of Code 2019

Argon2 is a modern memory-hard hashing scheme designed by Biryukov et al.[1] Compared to currently supported hashing algorithms in NetBSD, memory-hard Argon2 provides improved resistance against Time Memory Trade-off (TMTO) and side-channel attacks. In our project, we are working to incorporate Argon2 into the local password management framework of NetBSD.

[Read More] [0 comments]

 

Implementation of DRM ioctl Support for NetBSD kernel

This report was prepared by Surya P as a part of Google Summer of Code 2019

Enabling support of DRM ioctls in linux emulation.

[Read More] [3 comments]

 

LLDB: watchpoints, XSTATE in ptrace() and core dumps

Upstream describes LLDB as a next generation, high-performance debugger. It is built on top of LLVM/Clang toolchain, and features great integration with it. At the moment, it primarily supports debugging C, C++ and ObjC code, and there is interest in extending it to more languages.

In February, I have started working on LLDB, as contracted by the NetBSD Foundation. So far I've been working on reenabling continuous integration, squashing bugs, improving NetBSD core file support and lately extending NetBSD's ptrace interface to cover more register types and fix compat32 issues. You can read more about that in my May 2019 report.

In June, I have finally finished the remaining ptrace() work for xstate and got it merged both on NetBSD and LLDB end (meaning it's going to make it into NetBSD 9). I have also worked on debug register support in LLDB, effectively fixing watchpoint support. Once again I had to fight some upstream regressions.

[Read More] [1 comment]