From 9a25b96c1f6e1a3c85c9524f3046c7c75d8fecc7 Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@citi.umich.edu>
Date: Thu, 19 Jul 2007 01:49:18 -0700
Subject: [PATCH] nfsd: return errors, not NULL, from export functions
I converted the various export-returning functions to return -ENOENT instead
of NULL, but missed a few cases.
This particular case could cause actual bugs in the case of a krb5 client that
doesn't match any ip-based client and that is trying to access a filesystem
not exported to krb5 clients.
Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Acked-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/nfsd/export.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index c7bbf460b009d..6ab8de40904ce 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1265,7 +1265,7 @@ struct svc_export *
rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
struct dentry *dentry)
{
- struct svc_export *gssexp, *exp = NULL;
+ struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
if (rqstp->rq_client == NULL)
goto gss;
@@ -1288,7 +1288,7 @@ rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
&rqstp->rq_chandle);
if (PTR_ERR(gssexp) == -ENOENT)
return exp;
- if (exp && !IS_ERR(exp))
+ if (!IS_ERR(exp))
exp_put(exp);
return gssexp;
}
@@ -1296,7 +1296,7 @@ rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt,
struct svc_export *
rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
{
- struct svc_export *gssexp, *exp = NULL;
+ struct svc_export *gssexp, *exp = ERR_PTR(-ENOENT);
if (rqstp->rq_client == NULL)
goto gss;
@@ -1318,7 +1318,7 @@ rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv)
&rqstp->rq_chandle);
if (PTR_ERR(gssexp) == -ENOENT)
return exp;
- if (exp && !IS_ERR(exp))
+ if (!IS_ERR(exp))
exp_put(exp);
return gssexp;
}
--
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