linux-kernel - Re: [PATCH repost] virtio: don't crash when device is buggy

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Message-ID: <87ehm1s28q.fsf@rustcorp.com.au>
Date:	Mon, 17 Sep 2012 13:57:17 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Sjur Brændeland <sjurbren@...il.com>,
	Amit Shah <amit.shah@...hat.com>, linux-kernel@...r.kernel.org,
	Ohad Ben-Cohen <ohad@...ery.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH repost] virtio: don't crash when device is buggy

"Michael S. Tsirkin" <mst@...hat.com> writes:

> Because of a sanity check in virtio_dev_remove, a buggy device can crash
> kernel.  And in case of rproc it's userspace so it's not a good idea.
> We are unloading a driver so how bad can it be?
> Be less aggressive in handling this error: if it's a driver bug,
> warning once should be enough.
>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
>
> --
>
> 3.6 material?

I have already applied, this, but it's not for stable, since it's a
"theoretical bugfix".  That check has been in there forever and noone
AFAIK has actually struck it.

Cheers,
Rusty.
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