From: Wei Liu <wei.liu@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Dexuan Cui <decui@microsoft.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Jessica Yu <jeyu@kernel.org>,
x86@kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-mm@kvack.org, Wei Liu <wei.liu@kernel.org>
Subject: Re: [PATCH 1/3] x86/hyperv: allocate the hypercall page with only read and execute bits
Date: Thu, 18 Jun 2020 11:47:29 +0000 [thread overview]
Message-ID: <20200618114729.bnut7gbj2j4uhjnc@liuwe-devbox-debian-v2> (raw)
In-Reply-To: <20200618064307.32739-2-hch@lst.de>
On Thu, Jun 18, 2020 at 08:43:05AM +0200, Christoph Hellwig wrote:
> Avoid a W^X violation cause by the fact that PAGE_KERNEL_EXEC includes the
> writable bit.
>
> For this resurrect the removed PAGE_KERNEL_RX definitіon, but as
> PAGE_KERNEL_ROX to match arm64 and powerpc.
>
> Fixes: 78bb17f76edc ("x86/hyperv: use vmalloc_exec for the hypercall page")
> Reported-by: Dexuan Cui <decui@microsoft.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
WARNING: multiple messages have this Message-ID (diff)
From: Wei Liu <wei.liu@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: linux-hyperv@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
x86@kernel.org, Dexuan Cui <decui@microsoft.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Wei Liu <wei.liu@kernel.org>, Jessica Yu <jeyu@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Will Deacon <will@kernel.org>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/3] x86/hyperv: allocate the hypercall page with only read and execute bits
Date: Thu, 18 Jun 2020 11:47:29 +0000 [thread overview]
Message-ID: <20200618114729.bnut7gbj2j4uhjnc@liuwe-devbox-debian-v2> (raw)
In-Reply-To: <20200618064307.32739-2-hch@lst.de>
On Thu, Jun 18, 2020 at 08:43:05AM +0200, Christoph Hellwig wrote:
> Avoid a W^X violation cause by the fact that PAGE_KERNEL_EXEC includes the
> writable bit.
>
> For this resurrect the removed PAGE_KERNEL_RX definitіon, but as
> PAGE_KERNEL_ROX to match arm64 and powerpc.
>
> Fixes: 78bb17f76edc ("x86/hyperv: use vmalloc_exec for the hypercall page")
> Reported-by: Dexuan Cui <decui@microsoft.com>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Wei Liu <wei.liu@kernel.org>
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next prev parent reply other threads:[~2020-06-18 11:47 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-18 6:43 fix a hyperv W^X violation and remove vmalloc_exec Christoph Hellwig
2020-06-18 6:43 ` Christoph Hellwig
2020-06-18 6:43 ` [PATCH 1/3] x86/hyperv: allocate the hypercall page with only read and execute bits Christoph Hellwig
2020-06-18 6:43 ` Christoph Hellwig
2020-06-18 11:47 ` Wei Liu [this message]
2020-06-18 11:47 ` Wei Liu
2020-06-18 6:43 ` [PATCH 2/3] arm64: use PAGE_KERNEL_ROX directly in alloc_insn_page Christoph Hellwig
2020-06-18 6:43 ` Christoph Hellwig
2020-06-18 8:55 ` David Hildenbrand
2020-06-18 8:55 ` David Hildenbrand
2020-06-18 10:35 ` Peter Zijlstra
2020-06-18 10:35 ` Peter Zijlstra
2020-06-18 13:50 ` Christoph Hellwig
2020-06-18 13:50 ` Christoph Hellwig
2020-06-18 9:27 ` Peter Zijlstra
2020-06-18 9:27 ` Peter Zijlstra
2020-06-21 2:16 ` Andrew Morton
2020-06-23 9:05 ` Christoph Hellwig
2020-06-23 9:07 ` Will Deacon
2020-06-23 9:37 ` Peter Zijlstra
2020-06-23 9:57 ` Will Deacon
2020-06-27 7:34 ` Ard Biesheuvel
2020-06-27 7:34 ` Ard Biesheuvel
2020-06-27 7:34 ` Ard Biesheuvel
2020-06-27 7:56 ` Christoph Hellwig
2020-06-27 7:56 ` Christoph Hellwig
2020-06-27 7:57 ` Ard Biesheuvel
2020-06-27 7:57 ` Ard Biesheuvel
2020-06-27 7:57 ` Ard Biesheuvel
2020-06-18 6:43 ` [PATCH 3/3] mm: remove vmalloc_exec Christoph Hellwig
2020-06-18 6:43 ` Christoph Hellwig
2020-06-18 8:53 ` David Hildenbrand
2020-06-18 8:53 ` David Hildenbrand
2020-06-18 9:28 ` fix a hyperv W^X violation and " Peter Zijlstra
2020-06-18 9:28 ` Peter Zijlstra
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