SUNRPC: Don't recognize RPC_AUTH_MAXFLAVOR
RPC_AUTH_MAXFLAVOR is an invalid flavor, on purpose. Don't allow
any processing whatsoever if a caller passes it to rpcauth_create()
or rpcauth_get_gssinfo().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 2bc0cc2..ed2fdd2 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -82,7 +82,7 @@
static u32
pseudoflavor_to_flavor(u32 flavor) {
- if (flavor >= RPC_AUTH_MAXFLAVOR)
+ if (flavor > RPC_AUTH_MAXFLAVOR)
return RPC_AUTH_GSS;
return flavor;
}
@@ -173,6 +173,9 @@
const struct rpc_authops *ops;
int result;
+ if (flavor >= RPC_AUTH_MAXFLAVOR)
+ return -EINVAL;
+
ops = auth_flavors[flavor];
if (ops == NULL)
request_module("rpc-auth-%u", flavor);