linux-kernel - Re: [PATCHv2 1/1] ext4/f2fs: don't put symlink in pagecache into highmem

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Message-ID: <20180207200604.GB15309@kroah.com>
Date:   Wed, 7 Feb 2018 12:06:04 -0800
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Jin Qian <jinqian@...roid.com>
Cc:     Theodore Ts'o <tytso@....edu>,
        Andreas Dilger <adilger.kernel@...ger.ca>,
        Jaegeuk Kim <jaegeuk@...nel.org>,
        Changman Lee <cm224.lee@...sung.com>,
        Chao Yu <chao2.yu@...sung.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Jeff Layton <jlayton@...chiereds.net>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, Jin Qian <jinqian@...gle.com>,
        linux-stable <stable@...r.kernel.org>
Subject: Re: [PATCHv2 1/1] ext4/f2fs: don't put symlink in pagecache into
 highmem

Some minor nits for when you send your next patch for stable:

On Tue, Feb 06, 2018 at 03:53:53PM -0800, Jin Qian wrote:
> From: Jin Qian <jinqian@...gle.com>

The original patch was written by Al Viro, please do not take the
original authorship off, that's not good.

> 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: linux-stable <stable@...r.kernel.org> # 4.4.y
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> Signed-off-by: Jin Qian <jinqian@...gle.com>
> Signed-off-by: Jin Qian <jinqian@...roid.com>

Why did you sign off on this twice?

thanks,

greg k-h