linux-kernel - Re: [PATCH 2/3] fs/ceph/xattr.c: Use kasprintf

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sun, 17 Oct 2010 21:02:39 +0200 (CEST)
From:	Julia Lawall <julia@...u.dk>
To:	Joe Perches <joe@...ches.com>
Cc:	Sage Weil <sage@...dream.net>, kernel-janitors@...r.kernel.org,
	ceph-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] fs/ceph/xattr.c: Use kasprintf

On Sun, 17 Oct 2010, Joe Perches wrote:

> On Sun, 2010-10-17 at 20:48 +0200, Julia Lawall wrote:
> > Convert a sequence of kmalloc and memcpy to use kasprintf.  The argument is
> > checked for being a string by the presence of a previous call to strlen.
> []
> > diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
> []
> > @@ -716,10 +716,9 @@ int ceph_setxattr(struct dentry *dentry, const char *name,
> >  
> >  	/* preallocate memory for xattr name, value, index node */
> >  	err = -ENOMEM;
> > -	newname = kmalloc(name_len + 1, GFP_NOFS);
> > +	newname = kasprintf(GFP_NOFS, "%s", name);
> 
> This one is probably better converted to kmemdup
> as name_len is already known and is used later
> in the routine.
> 
> kstrdup is also a possibility.

That calculates the length again, so I will change it to kmemdup.

julia
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/