linux-kernel - Re: [PATCHv2 03/12]posix

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Message-ID: <20091221153907.GA30127@us.ibm.com>
Date:	Mon, 21 Dec 2009 09:39:07 -0600
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Liuwenyi <qingshenlwy@...il.com>
Cc:	viro@...iv.linux.org.uk, jmorris@...ei.org, joel.becker@...cle.com,
	hch@....de, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org, strongzgy@...il.com,
	onlyflyer@...il.com
Subject: Re: [PATCHv2 03/12]posix_acl: Add the check items

Quoting Liuwenyi (qingshenlwy@...il.com):
> move the ACL validation check in to fs/posix_acl.c.
> Including nullpointer check and PTR_ERR check.
> 
> ---
> Signed-off-by: Liuwenyi <qingshenlwy@...il.com>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: James Morris <jmorris@...ei.org>
> Cc: Joel Becker <joel.becker@...cle.com>
> Cc: Serge Hallyn <serue@...ibm.com>
> Cc: Christoph Hellwig <hch@....de>
> Cc: linux-ext4@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> 
> ---
> diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
> index a99e543..480fe88 100644
> --- a/fs/ext2/acl.c
> +++ b/fs/ext2/acl.c
> @@ -403,13 +403,11 @@ ext2_xattr_set_acl(struct dentry *dentry, const
> char *name, const void *value,
> 
> if (value) {
> acl = posix_acl_from_xattr(value, size);
> - if (IS_ERR(acl))
> - return PTR_ERR(acl);
> - else if (acl) {
> - error = posix_acl_valid(acl);
> - if (error)
> - goto release_and_out;
> - }
> +
> + error = posix_acl_valid(acl);
> + if (error)
> + goto release_and_out;

Don't you also need to either update posix_acl_release() in your
first patch to handle IS_ERR(acl), or else update the release_and_out:
path in each caller?

> +
> } else
> acl = NULL;
> 
> 
> -- 
> Best Regards,
> Liuwenyi
--
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