linux-kernel - Re: [PATCH] iommu/amd: Fix I/O page table memory leak

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Date:   Mon, 14 Feb 2022 12:52:53 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Cc:     linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        daniel.m.jordan@...cle.com, Jon.Grimm@....com, wei.huang2@....com,
        terry.bowman@....com
Subject: Re: [PATCH] iommu/amd: Fix I/O page table memory leak

On Thu, Feb 10, 2022 at 09:47:45AM -0600, Suravee Suthikulpanit wrote:
> The current logic updates the I/O page table mode for the domain
> before calling the logic to free memory used for the page table.
> This results in IOMMU page table memory leak, and can be observed
> when launching VM w/ pass-through devices.
> 
> Fix by freeing the memory used for page table before updating the mode.
> 
> Cc: Joerg Roedel <joro@...tes.org>
> Reported-by: Daniel Jordan <daniel.m.jordan@...cle.com>
> Tested-by: Daniel Jordan <daniel.m.jordan@...cle.com>
> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
> Fixes: e42ba0633064 ("iommu/amd: Restructure code for freeing page table")
> Link: https://lore.kernel.org/all/20220118194720.urjgi73b7c3tq2o6@oracle.com/
> ---
>  drivers/iommu/amd/io_pgtable.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)

Applied, thanks.