Re: [PATCH v2 4/4] xen/netback: fix grant copy across page boundary

From: Paul Durrant <pdurrant@gmail.com>
To: Sergey Dyasli <sergey.dyasli@citrix.com>
Cc: xen-devel@lists.xen.org, kasan-dev@googlegroups.com,
	linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Andrey Ryabinin <aryabinin@virtuozzo.com>,
	Alexander Potapenko <glider@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Juergen Gross <jgross@suse.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	George Dunlap <george.dunlap@citrix.com>,
	Ross Lagerwall <ross.lagerwall@citrix.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Wei Liu <wei.liu@kernel.org>
Subject: Re: [PATCH v2 4/4] xen/netback: fix grant copy across page boundary
Date: Mon, 20 Jan 2020 08:58:02 +0000	[thread overview]
Message-ID: <CACCGGhApXXnQwfBN_LioAh+8bk-cAAQ2ciua-MnnQoMBUfap6g@mail.gmail.com> (raw)
In-Reply-To: <20200117125834.14552-5-sergey.dyasli@citrix.com>

On Fri, 17 Jan 2020 at 12:59, Sergey Dyasli <sergey.dyasli@citrix.com> wrote:
>
> From: Ross Lagerwall <ross.lagerwall@citrix.com>
>
> When KASAN (or SLUB_DEBUG) is turned on, there is a higher chance that
> non-power-of-two allocations are not aligned to the next power of 2 of
> the size. Therefore, handle grant copies that cross page boundaries.
>
> Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
> Signed-off-by: Sergey Dyasli <sergey.dyasli@citrix.com>
> ---
> v1 --> v2:
> - Use sizeof_field(struct sk_buff, cb)) instead of magic number 48
> - Slightly update commit message
>
> RFC --> v1:
> - Added BUILD_BUG_ON to the netback patch
> - xenvif_idx_release() now located outside the loop
>
> CC: Wei Liu <wei.liu@kernel.org>
> CC: Paul Durrant <paul@xen.org>

Acked-by: Paul Durrant <paul@xen.org>