From: Paul Durrant <xadimgnik@gmail.com>
To: "'Julien Grall'" <julien@xen.org>, <xen-devel@lists.xenproject.org>
Cc: <hongyxia@amazon.co.uk>, <iwj@xenproject.org>,
"'Julien Grall'" <jgrall@amazon.com>,
"'Jan Beulich'" <jbeulich@suse.com>
Subject: RE: [for-4.15][PATCH v2 4/5] xen/iommu: x86: Don't leak the IOMMU page-tables
Date: Tue, 9 Feb 2021 20:33:10 -0000 [thread overview]
Message-ID: <04f801d6ff22$c8acd830$5a068890$@xen.org> (raw)
In-Reply-To: <20210209152816.15792-5-julien@xen.org>
> -----Original Message-----
> From: Julien Grall <julien@xen.org>
> Sent: 09 February 2021 15:28
> To: xen-devel@lists.xenproject.org
> Cc: hongyxia@amazon.co.uk; iwj@xenproject.org; Julien Grall <jgrall@amazon.com>; Jan Beulich
> <jbeulich@suse.com>; Paul Durrant <paul@xen.org>
> Subject: [for-4.15][PATCH v2 4/5] xen/iommu: x86: Don't leak the IOMMU page-tables
>
> From: Julien Grall <jgrall@amazon.com>
>
> The new IOMMU page-tables allocator will release the pages when
> relinquish the domain resources. However, this is not sufficient when
> the domain is dying because nothing prevents page-table to be allocated.
>
> iommu_alloc_pgtable() is now checking if the domain is dying before
> adding the page in the list. We are relying on &hd->arch.pgtables.lock
> to synchronize d->is_dying.
>
> Take the opportunity to check in arch_iommu_domain_destroy() that all
> that page tables have been freed.
>
> Signed-off-by: Julien Grall <jgrall@amazon.com>
>
Reviewed-by: Paul Durrant <paul@xen.org>
next prev parent reply other threads:[~2021-02-09 20:33 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-09 15:28 [for-4.15][PATCH v2 0/5] xen/iommu: Collection of bug fixes for IOMMU teadorwn Julien Grall
2021-02-09 15:28 ` [for-4.15][PATCH v2 1/5] xen/x86: p2m: Don't map the special pages in the IOMMU page-tables Julien Grall
2021-02-09 20:19 ` Paul Durrant
2021-02-10 8:29 ` Roger Pau Monné
2021-02-10 8:50 ` Julien Grall
2021-02-10 9:34 ` Julien Grall
2021-02-10 11:10 ` Jan Beulich
2021-02-10 11:34 ` Roger Pau Monné
2021-02-10 11:38 ` Jan Beulich
2021-02-10 11:40 ` Julien Grall
2021-02-10 11:45 ` Jan Beulich
2021-02-10 11:48 ` Julien Grall
2021-02-10 11:54 ` Roger Pau Monné
2021-02-10 13:12 ` Jan Beulich
2021-02-10 15:24 ` Roger Pau Monné
2021-02-10 15:53 ` Jan Beulich
2021-02-10 13:08 ` Jan Beulich
2021-02-10 11:26 ` Jan Beulich
2021-02-15 11:38 ` Julien Grall
2021-02-15 12:36 ` Jan Beulich
2021-02-15 12:54 ` Julien Grall
2021-02-15 13:14 ` Jan Beulich
2021-02-17 11:21 ` Julien Grall
2021-02-09 15:28 ` [for-4.15][PATCH v2 2/5] xen/iommu: Check if the IOMMU was initialized before tearing down Julien Grall
2021-02-09 20:22 ` Paul Durrant
2021-02-17 11:25 ` Julien Grall
2021-02-09 15:28 ` [for-4.15][PATCH v2 3/5] xen/iommu: iommu_map: Don't crash the domain if it is dying Julien Grall
2021-02-09 20:28 ` Paul Durrant
2021-02-09 21:14 ` Julien Grall
2021-02-10 14:14 ` Jan Beulich
2021-02-10 14:58 ` Julien Grall
2021-02-10 15:56 ` Jan Beulich
2021-02-09 15:28 ` [for-4.15][PATCH v2 4/5] xen/iommu: x86: Don't leak the IOMMU page-tables Julien Grall
2021-02-09 20:33 ` Paul Durrant [this message]
2021-02-10 14:32 ` Jan Beulich
2021-02-10 15:04 ` Julien Grall
2021-02-10 16:12 ` Jan Beulich
2021-02-17 11:49 ` Julien Grall
2021-02-17 12:57 ` Jan Beulich
2021-02-10 14:44 ` Jan Beulich
2021-02-09 15:28 ` [for-4.15][PATCH v2 5/5] xen/iommu: x86: Clear the root page-table before freeing the page-tables Julien Grall
2021-02-09 20:36 ` Paul Durrant
2021-02-10 2:21 ` Tian, Kevin
2021-02-17 13:54 ` Julien Grall
2021-02-10 14:39 ` Jan Beulich
2021-02-09 16:47 ` [for-4.15][PATCH v2 0/5] xen/iommu: Collection of bug fixes for IOMMU teadorwn Ian Jackson
2021-02-17 11:33 ` Julien Grall
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