Re: [PATCH 1/2] virtio: fix memory leak on device removal

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On Thu, Jul 23, 2009 at 01:56:58PM +0930, Rusty Russell wrote:
> On Wed, 22 Jul 2009 01:29:09 am Michael S. Tsirkin wrote:
> > Free up msi vector tables.
> 
> Michael, this papers over the bug, but doesn't actually fix the problem.
> 
> The problem is that vp_free_vectors() does not do the reverse of 
> vp_request_vectors.  If the author (you) can't get it right, what hope the 
> rest of us?

I agree. This code belongs in free_vectors.
And might as well reset the pointers to make the reversal complete.

> Indeed, if you look harder, you'll see another leak caused by this problem, 
> which your patch *didn't* fix.

Couldn't spot it yet. I'll send out a fixed patch, see if I got
everything covered.

> Thanks,
> Rusty.
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