NFS: Ignore connections that have cl_rpcclient uninitialized
cl_rpcclient starts as ERR_PTR(-EINVAL), and connections like that
are floating freely through the system. Most places check whether
pointer is valid before dereferencing it, but newly added code
in nfs_match_client does not.
Which causes crashes when more than one NFS mount point is present.
Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 7555ba8..ebecfb8 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -314,7 +314,8 @@
/* Match the full socket address */
if (!rpc_cmp_addr_port(sap, clap))
/* Match all xprt_switch full socket addresses */
- if (!rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
+ if (IS_ERR(clp->cl_rpcclient) ||
+ !rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
sap))
continue;