linux-kernel - Re: [PATCH v3] iommu/io-pgtable-arm-v7s: Add error handle for page table allocation failure

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Message-Id: <163949313634.2865984.16870619152235318237.b4-ty@kernel.org>
Date:   Tue, 14 Dec 2021 15:18:17 +0000
From:   Will Deacon <will@...nel.org>
To:     yf.wang@...iatek.com
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, Guangming.Cao@...iatek.com,
        linux-mediatek@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, wsd_upstream@...iatek.com,
        Libo.Kang@...iatek.com, linux-kernel@...r.kernel.org,
        robin.murphy@....com, matthias.bgg@...il.com,
        stable@...r.kernel.org
Subject: Re: [PATCH v3] iommu/io-pgtable-arm-v7s: Add error handle for page table allocation failure

On Tue, 7 Dec 2021 19:33:15 +0800, yf.wang@...iatek.com wrote:
> From: Yunfei Wang <yf.wang@...iatek.com>
> 
> In __arm_v7s_alloc_table function:
> iommu call kmem_cache_alloc to allocate page table, this function
> allocate memory may fail, when kmem_cache_alloc fails to allocate
> table, call virt_to_phys will be abnomal and return unexpected phys
> and goto out_free, then call kmem_cache_free to release table will
> trigger KE, __get_free_pages and free_pages have similar problem,
> so add error handle for page table allocation failure.
> 
> [...]

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/io-pgtable-arm-v7s: Add error handle for page table allocation failure
      https://git.kernel.org/will/c/a556cfe4cabc

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev