linux-kernel - ptrace() memory corruption?

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Message-ID: <20061224000753.GA1811@elf.ucw.cz>
Date:	Sun, 24 Dec 2006 01:07:54 +0100
From:	Pavel Machek <pavel@....cz>
To:	Andrew Morton <akpm@...l.org>,
	kernel list <linux-kernel@...r.kernel.org>
Cc:	marcel@...tmann.org, maxk@...lcomm.com, bluez-devel@...ts.sf.net
Subject: ptrace() memory corruption?

On Sun 2006-12-24 01:06:05, Pavel Machek wrote:
> On Sun 2006-12-24 01:01:50, Pavel Machek wrote:
> > Hi!
> > 
> > > > I got this nasty oops while playing with debugger. Not sure if that is
> > > > related; it also might be something with bluetooth; I already know it
> > > > corrupts memory during suspend, perhaps it corrupts memory in some
> > > > error path?
> > > 
> > > Okay, I spoke too soon. bluetooth & suspend memory corruption was
> > > _way_ harder to reproduce than expected. Took me 5-or-so-suspend
> > > cycles... so it is probably unrelated to the previous crash.
> > > 
> > > I was getting pretty regular crashes with bluetooth & gdb, but I was
> > > not using bluetooth at the time of ext3-related crash.
> > 
> > And for completeness, here's bluetooth + gdb oops. Ok, I'm not _sure_
> > it is bluetooth related. I'll try it without bluetooth in a while.
> 
> Ok, so this one is not bluetooth related. My little "phone"
> application provokes nasty oops, even when talking to
> /dev/null. Strange, that code does _nothing_
> strange. (www.sf.net/projects/tui).
> 
> Is there something wrong with gdb?

Yep. If I do gdb /bin/bash, run; I'll get similar oops. Am I alone
seeing this?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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