[patch 17/69] knfsd: Avoid use of unitialised variables on error path when nfs exports.

[Chris Wright]

-stable review patch.  If anyone has any objections, please let us know.
---------------------

From: NeilBrown <neilb@xxxxxxx>

We need to zero various parts of 'exp' before any 'goto out', otherwise
when we go to free the contents... we die.

Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>
---

 fs/nfsd/export.c |   14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff .prev/fs/nfsd/export.c ./fs/nfsd/export.c
--- linux-2.6.21.1.orig/fs/nfsd/export.c
+++ linux-2.6.21.1/fs/nfsd/export.c
@@ -469,6 +469,13 @@ static int svc_export_parse(struct cache
 	nd.dentry = NULL;
 	exp.ex_path = NULL;
 
+	/* fs locations */
+	exp.ex_fslocs.locations = NULL;
+	exp.ex_fslocs.locations_count = 0;
+	exp.ex_fslocs.migrated = 0;
+
+	exp.ex_uuid = NULL;
+
 	if (mesg[mlen-1] != '\n')
 		return -EINVAL;
 	mesg[mlen-1] = 0;
@@ -509,13 +516,6 @@ static int svc_export_parse(struct cache
 	if (exp.h.expiry_time == 0)
 		goto out;
 
-	/* fs locations */
-	exp.ex_fslocs.locations = NULL;
-	exp.ex_fslocs.locations_count = 0;
-	exp.ex_fslocs.migrated = 0;
-
-	exp.ex_uuid = NULL;
-
 	/* flags */
 	err = get_int(&mesg, &an_int);
 	if (err == -ENOENT)

-- 
-
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