linux-kernel - Re: Re: Re: Re: Re: Re: A reliable kernel panic (3.6.2) and system crash when visiting a particular website

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Message-ID: <20121021203647.GA13365@liondog.tnic>
Date:	Sun, 21 Oct 2012 22:36:47 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	"Artem S. Tashkinov" <t.artem@...os.com>
Cc:	pavel@....cz, linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	security@...nel.org, linux-media@...r.kernel.org,
	linux-usb@...r.kernel.org, zonque@...il.com,
	alsa-devel@...a-project.org, stern@...land.harvard.edu
Subject: Re: Re: Re: Re: Re: Re: A reliable kernel panic (3.6.2) and system
 crash when visiting a particular website

On Sun, Oct 21, 2012 at 07:49:01PM +0000, Artem S. Tashkinov wrote:
> I ran it this way: while :; do dmesg -c; done | scat /dev/sda11 (yes,
> straight to a hdd partition to eliminate a FS cache)

Well, I'm no fs guy but this should still go through the buffer cache. I
think the O_SYNC flag makes sure it all lands on the partition in time.
Oh well, it doesn't matter.

> Don't judge me harshly - I'm not a programmer.

If you wrote that and you're not a programmer, it certainly looks cool,
good job!.

 [ Btw, don't forget to free(buffer) at the end. ]

Also, there was a patchset recently which added a blockconsole method to
the kernel with which you can do something like that in a generic way.

Back to the issue at hand: it looks like ehci_hcd is causing some list
corruptions, maybe coming from the uvcvideo or whatever. I think the usb
people will have a better idea.

Btw, is there any particular reason you're running a 32-bit kernel?

Thanks.

-- 
Regards/Gruss,
    Boris.
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