I am Dave Jing Tian, an Assistant Professor in the Department of Computer Science at Purdue University working on system security. My research involves embedded systems, operating systems, and trusted computing. All opinions are my own.
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Tag Archives: Linux
Our paper “Making USB Great Again with USBFILTER” has been accepted by USENIX Security’16. This post provides a summary of usbfilter. For details, please read the damn paper or download the presentation video/slides from USENIX website. I will head to … Continue reading
After almost 5 hours of upgrading, my server has been successfully upgraded from Fedora 21 to Fedora 24, which uses the latest stable kernel 4.6. There is a online post demonstrating how to upgrade from Fedora 21 to 23 using … Continue reading
This post talks about what happened recently in the Linux kernel mailing list discussion. While this post does not dig into compiler internals or the whole picture between the Linux kernel and compilers, we discuss 2 specific issues from gcc … Continue reading
Finally, 4 months after our paper was accepted by ACSAC’15, I could now write a blog talking about our work – GoodUSB, and release the code, due to some software patent bul*sh*t. (I sincerely think software patent should be abolished … Continue reading
I wrote a post about kernel relay 2 years go (https://davejingtian.org/2013/06/29/relay-linux-kernel-relay-filesystem/). However, I have realized that I did not understand relay until recently when I was debugging a relay-related bug. Though I was working on RHEL 2.6.32 kernel, this post … Continue reading
In my old post (https://davejingtian.org/2015/02/17/retrieve-pid-from-the-packet-in-unix-domain-socket-a-complete-use-case-for-recvmsgsendmsg/), we talked about how to retrieve the peer PID from Unix domain socket using struct ucred. A more smart way to do this is using getsockopt() syscall with option SO_PEERCRED directly. As you expected (or … Continue reading