netdev - Re: 2.6.23-rc1: BUG_ON in kmap_atomic

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: Windows password security audit tool. GUI, reports in PDF.

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

Date:	Mon, 23 Jul 2007 14:11:37 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alexey Dobriyan <adobriyan@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: 2.6.23-rc1: BUG_ON in kmap_atomic_prot()

On Tue, 24 Jul 2007 01:01:53 +0400
Alexey Dobriyan <adobriyan@...il.com> wrote:

> On Tue, Jul 24, 2007 at 12:40:45AM +0400, Alexey Dobriyan wrote:
> > > I had more complete info: http://article.gmane.org/gmane.linux.network/66966
> > > 
> > > You're using DEBUG_PAGEALLOC, but I was not, so I think we can rule that out.
> > > 
> > > I haven't worked out where that kmap_atomic() call is coming from yet. 
> > > Both traces point up into the page allocator, but I _think_ that's stack
> > > gunk.
> > 
> > Ahh, you suspect networking.
> > 
> > Here, setup is 2 cheap-ass 100Mb realtek 8139 NICs, one to campus network
> > receiving ~20 junk packets per second, one gathering netconsole output
> > and ssh to it, no conntracks and fancy stuff.
> > 
> > [reboots with cables physically unplugged]
> 
> OK, I run gdb recompile, cat(1) every file in /usr/portage (shitload of
> small files) with both cables unplugged. It all went fine for ~5 minutes
> after that it crashed exactly same way after 10 secs after plugging one
> of them.

It'd be nice to get a clean trace.  Are you able to obtain the full
trace with CONFIG_FRAME_POINTER=y?
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html