linux-kernel - Re: [PATCH 8/8] nfsd: Fix misuse of strlcpy

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Date:   Mon, 8 Jul 2019 23:14:04 -0400
From:   "J. Bruce Fields" <bfields@...ldses.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Chuck Lever <chuck.lever@...cle.com>, linux-nfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/8] nfsd: Fix misuse of strlcpy

On Thu, Jul 04, 2019 at 04:57:48PM -0700, Joe Perches wrote:
> Probable cut&paste typo - use the correct field size.

Huh, that's been there forever, I wonder why we haven't seen crashes?
Oh, I see, name and authname both have the same size.

Anyway, makes sense, thanks.  Will apply for 5.3.

(Unless someone else is getting this; I didn't get copied on the rest of
the series.)

--b.

> 
> Signed-off-by: Joe Perches <joe@...ches.com>
> ---
>  fs/nfsd/nfs4idmap.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
> index 2961016097ac..d1f285245af8 100644
> --- a/fs/nfsd/nfs4idmap.c
> +++ b/fs/nfsd/nfs4idmap.c
> @@ -83,7 +83,7 @@ ent_init(struct cache_head *cnew, struct cache_head *citm)
>  	new->type = itm->type;
>  
>  	strlcpy(new->name, itm->name, sizeof(new->name));
> -	strlcpy(new->authname, itm->authname, sizeof(new->name));
> +	strlcpy(new->authname, itm->authname, sizeof(new->authname));
>  }
>  
>  static void
> -- 
> 2.15.0