Re: [PATCH 14/13] sysfs: sysfs_setattr remove unnecessary permission check.

["Serge E. Hallyn" <serue@us.ibm.com>]

Quoting Eric W. Biederman (ebiederm@xmission.com):
> 
> inode_change_ok already clears the SGID bit when necessary so there is
> no reason for sysfs_setattr to carry code to do the same, and it is
> good to kill the extra copy because when I moved the code, I goofed
> and in certain corner cases the code will look at the wrong gid.
> 
> Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com>

Acked-by: Serge Hallyn <serue@us.ibm.com>

> ---
>  fs/sysfs/inode.c |    4 ----
>  1 files changed, 0 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c
> index 72e2e99..e2595a7 100644
> --- a/fs/sysfs/inode.c
> +++ b/fs/sysfs/inode.c
> @@ -120,10 +120,6 @@ int sysfs_setattr(struct dentry * dentry, struct iattr * iattr)
>  		return error;
> 
>  	iattr->ia_valid &= ~ATTR_SIZE; /* ignore size changes */
> -	if (iattr->ia_valid & ATTR_MODE) {
> -		if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
> -			iattr->ia_mode &= ~S_ISGID;
> -	}
> 
>  	error = inode_setattr(inode, iattr);
>  	if (error)
> -- 
> 1.6.5.2.143.g8cc62
> 
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