Re: NFS thinko

["J. Bruce Fields" <bfields@fieldses.org>]

On Fri, Apr 16, 2004 at 10:16:28PM +0100, Dave Jones wrote:
> Dereferencing 'exp' before the check for NULL.

It would be a bug if exp were ever NULL there.  Better just to delete
that check entirely.

--Bruce Fields


If ek = exp_find_key() is not an error, then ek->ek_export should be
set; no point in checking if it's NULL.


 include/linux/nfsd/export.h |    3 +--
 1 files changed, 1 insertion(+), 2 deletions(-)

diff -puN include/linux/nfsd/export.h~export_exp_deref_fix include/linux/nfsd/export.h
--- linux-2.6.6-rc1/include/linux/nfsd/export.h~export_exp_deref_fix	2004-04-16 17:51:57.000000000 -0400
+++ linux-2.6.6-rc1-bfields/include/linux/nfsd/export.h	2004-04-16 17:58:30.000000000 -0400
@@ -120,8 +120,7 @@ exp_find(struct auth_domain *clp, int fs
 		int err;
 		cache_get(&exp->h);
 		expkey_put(&ek->h, &svc_expkey_cache);
-		if (exp &&
-		    (err = cache_check(&svc_export_cache, &exp->h, reqp)))
+		if ((err = cache_check(&svc_export_cache, &exp->h, reqp)))
 			exp = ERR_PTR(err);
 		return exp;
 	} else

_