Hi, I am trying to reproduce a syzkaller bug found in the vkms: - WARNING in vkms_gem_free_object - https://groups.google.com/forum/#!msg/syzkaller-bugs/_oARhriB1SA/PelnW1BqAwAJ However, I was not very successful in this task. As I don't know how to deal with syzkaller and I am not sure if I am following the right steps, it would be great if someone can give me some tips and guidance. First, looking at the bug history at: - https://syzkaller.appspot.com/bug?extid=e7ad70d406e74d8fc9d0, it seems like the bug still exists. Am I right? Second, here is a report of what I tried to do: Note: For testing, I use a VM (QEMU) with Debian 10 with a kernel compiled at - https://cgit.freedesktop.org/drm/drm-misc (branch drm-misc-next) 1 - Using the usual .config for my VM, I compiled and installed the kernel and, as root, ran the C program provided by syzkaller: - https://syzkaller.appspot.com/x/repro.c?x=15e27c53600000 Nothing happened. 2 - Then, I checked the debug/panic/hacking/drm/i915 debugging/vkms settings on the .config reported by syzkaller: - https://syzkaller.appspot.com/x/.config?x=7cf4eed5fe42c31a and enabled the same things in my .config. I compiled and installed the kernel and ran the C program. Nothing happened. 3 - So, I reverted my current branch to the commit that generated the bug (as reported: 94e2ec3f7fef86506293a448273b2b4ee21e6195) and used the kernel on that state. Nothing happened. 4 - I decided to use the syzkaller .config without modifications and adaptations for my VM (although I didn't think it felt right). I compiled, installed... some boot problems happened, but the kernel worked. I ran the C program and nothing. So I gave up... for a while :) Does anyone have any advice for me? I have already searched for information on the Internet, but I am still stuck. The last thing that I noted is that syzkaller stopped providing a C program of this bug for crashes after the beginning of the year (I also don't know if it is something important). Thanks in advance, Melissa Wen _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
