linux-kernel - Re: [PATCH] nfsd/nfs4acl: Number of used used array elements needs to be zeroed.

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Message-ID: <20080904150101.GB4536@fieldses.org>
Date:	Thu, 4 Sep 2008 11:01:01 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Jiri Pirko <jpirko@...hat.com>
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org,
	neilb@...e.de
Subject: Re: [PATCH] nfsd/nfs4acl: Number of used used array elements needs
	to be zeroed.

On Thu, Sep 04, 2008 at 04:55:18PM +0200, Jiri Pirko wrote:
> Number of used used array elements needs to be zeroed. It may cause
> problems otherwise, because it's used uninitialized in find_uid().
> 
> Signed-off-by: Jiri Pirko <jpirko@...hat.com>
> ---
>  fs/nfsd/nfs4acl.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4acl.c b/fs/nfsd/nfs4acl.c
> index 54b8b41..7dcd90f 100644
> --- a/fs/nfsd/nfs4acl.c
> +++ b/fs/nfsd/nfs4acl.c
> @@ -447,11 +447,13 @@ init_state(struct posix_acl_state *state, int cnt)
>  	state->users = kzalloc(alloc, GFP_KERNEL);
>  	if (!state->users)
>  		return -ENOMEM;
> +	state->users->n = 0;
>  	state->groups = kzalloc(alloc, GFP_KERNEL);
>  	if (!state->groups) {
>  		kfree(state->users);
>  		return -ENOMEM;
>  	}
> +	state->groups->n = 0;
>  	return 0;
>  }

Thanks for the extra eyes on this code, but: surely the kzalloc()'s are
all that's necessary?  Am I missing something?

--b.
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