From: Greg KH <gregkh@linuxfoundation.org>
To: Theodore Ts'o <tytso@mit.edu>
Cc: Jin Qian <jinqian@android.com>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Jeff Layton <jlayton@poochiereds.net>,
"J. Bruce Fields" <bfields@fieldses.org>,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-fsdevel@vger.kernel.org, Jin Qian <jinqian@google.com>,
stable@vger.kernel.org
Subject: Re: [PATCHv2 1/1] ext4: don't put symlink in pagecache into highmem
Date: Tue, 6 Feb 2018 12:39:53 -0800 [thread overview]
Message-ID: <20180206203953.GC18045@kroah.com> (raw)
In-Reply-To: <20180206190938.172792-1-jinqian@android.com>
On Tue, Feb 06, 2018 at 11:09:37AM -0800, Jin Qian wrote:
> From: Jin Qian <jinqian@google.com>
>
> partial backport from 21fc61c73c3903c4c312d0802da01ec2b323d174 upstream
> to v4.4 to prevent virt_to_page on highmem.
>
> ext4_encrypted_follow_link uses kmap() for cpage
> caddr = kmap(cpage);
>
> _ext4_fname_disk_to_usr calls virt_to_page on the kmapped address.
> _ext4_fname_disk_to_usr()
> ext4_fname_decrypt()
> sg_init_one()
> sg_init_one(&src_sg, iname->name, iname->len);
> sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf));
>
> Cc: stable@vger.kernel.org
> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
> Signed-off-by: Jin Qian <jinqian@google.com>
> Signed-off-by: Jin Qian <jinqian@android.com>
Ted, any objection to this patch?
thanks,
greg k-h
next prev parent reply other threads:[~2018-02-06 20:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-06 19:09 [PATCHv2 1/1] ext4: don't put symlink in pagecache into highmem Jin Qian
2018-02-06 20:39 ` Greg KH [this message]
2018-02-06 23:11 ` Theodore Ts'o
2018-02-06 23:38 ` Eric Biggers
2018-02-06 23:56 ` Jin Qian
2018-02-07 2:16 ` Theodore Ts'o
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