NFS: Handle exceptions coming out of nfs4_proc_fs_locations()

We don't want to return -NFS4ERR_WRONGSEC to the VFS because it could
cause the kernel to oops.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 2ce0698..ff7571f 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4921,7 +4921,7 @@ static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
        fattr->nlink = 2;
 }
 
-int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
+static int _nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
                struct nfs4_fs_locations *fs_locations, struct page *page)
 {
        struct nfs_server *server = NFS_SERVER(dir);
@@ -4961,6 +4961,19 @@ int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
        return status;
 }
 
+int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
+               struct nfs4_fs_locations *fs_locations, struct page *page)
+{
+       struct nfs4_exception exception = { };
+       int err;
+       do {
+               err = nfs4_handle_exception(NFS_SERVER(dir),
+                               _nfs4_proc_fs_locations(dir, name, fs_locations, page),
+                               &exception);
+       } while (exception.retry);
+       return err;
+}
+
 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
 {
        int status;