[PATCH] AFS: Potential null dereference

[David Howells]

From: Dan Carpenter <error27 at gmail.com>

It seems clear from the surrounding code that xpermits is allowed to be NULL
here.

Signed-off-by: Dan Carpenter <error27 at gmail.com>
Signed-off-by: David Howells <dhowells at redhat.com>
---

 fs/afs/security.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/afs/security.c b/fs/afs/security.c
index 3ef5043..bb4ed14 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -189,8 +189,9 @@ void afs_cache_permit(struct afs_vnode *vnode, struct key *key, long acl_order)
 	if (!permits)
 		goto out_unlock;
 
-	memcpy(permits->permits, xpermits->permits,
-	       count * sizeof(struct afs_permit));
+	if (xpermits)
+		memcpy(permits->permits, xpermits->permits,
+			count * sizeof(struct afs_permit));
 
 	_debug("key %x access %x",
 	       key_serial(key), vnode->status.caller_access);