linux-kernel - Re: [syzbot] [bcachefs?] general protection fault in proc_sys

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <wkn3delpogj7ay7irqjemviubsnvnnd72yaywqr4ibtbfjxfif@efp5mfvixwp5>
Date: Sat, 8 Mar 2025 16:58:53 -0500
From: Kent Overstreet <kent.overstreet@...ux.dev>
To: Theodore Ts'o <tytso@....edu>
Cc: Hector Martin <marcan@...can.st>, 
	syzbot <syzbot+4364ec1693041cad20de@...kaller.appspotmail.com>, broonie@...nel.org, joel.granados@...nel.org, kees@...nel.org, 
	linux-bcachefs@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs?] general protection fault in proc_sys_compare

On Sat, Mar 08, 2025 at 04:53:05PM -0500, Theodore Ts'o wrote:
> On Fri, Mar 07, 2025 at 09:33:11AM -0500, Kent Overstreet wrote:
> >
> > > Maybe this is something Syzbot could implement?
> > 
> > Wouldn't it be better to have it in 'git bisect'?
> 
> "Git bisect" is the wrong layer of abstraction.  It doesn't know
> anything about (a) how build the software package (which might not be
> the kernel, remember), nor how to run a test, nor how to tell whether
> a test run was successful or a failure.

Eh?

It has a mode for automatic bisections, you just give it a test that
runs pass/fail.

This works with my ktest, which runs tests in a VM and in non
interactive gives you that pass/fail in the exit code - I've used it
that way before.

> > If only we had interns and grad students for this sort of thing :)
> 
> The lightweight test manager (ltm) for gce-xfstests was implemented by
> an intern.  And the kernel compilation service (kcs), git branch
> watcher, and git bisection engine for gce-xfstests was done by a group
> of undergraduates at a unversity in Boston as part of a software
> engineering class project.
> 
> Mentoring interns and undergraduates was incredibly fulfilling, and I
> very much enjoyed the experience.  I'd like to think I helped them to
> become better software engineers.  However, mentoring students takes a
> significant amount of time, and on net, it's not clear it was a win
> from a personal time ROI perspective.
> 
> We did manage to recruit the intern to become a SWE at Google after he
> graduated, so that was definitely considered a win from my company's
> perspective.  :-)

Cool :)