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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/sunrpc/auth_null.c
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@@ -21,7 +21,7 @@
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 static struct rpc_auth *
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 nul_create(const struct rpc_auth_create_args *args, struct rpc_clnt *clnt)
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 {
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-	atomic_inc(&null_auth.au_count);
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+	refcount_inc(&null_auth.au_count);
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 	return &null_auth;
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 }
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@@ -36,8 +36,6 @@
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 static struct rpc_cred *
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 nul_lookup_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
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 {
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-	if (flags & RPCAUTH_LOOKUP_RCU)
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-		return &null_cred;
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 	return get_rpccred(&null_cred);
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 }
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@@ -61,15 +59,21 @@
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 /*
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  * Marshal credential.
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  */
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-static __be32 *
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-nul_marshal(struct rpc_task *task, __be32 *p)
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+static int
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+nul_marshal(struct rpc_task *task, struct xdr_stream *xdr)
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 {
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-	*p++ = htonl(RPC_AUTH_NULL);
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-	*p++ = 0;
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-	*p++ = htonl(RPC_AUTH_NULL);
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-	*p++ = 0;
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+	__be32 *p;
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-	return p;
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+	p = xdr_reserve_space(xdr, 4 * sizeof(*p));
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+	if (!p)
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+		return -EMSGSIZE;
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+	/* Credential */
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+	*p++ = rpc_auth_null;
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+	*p++ = xdr_zero;
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+	/* Verifier */
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+	*p++ = rpc_auth_null;
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+	*p   = xdr_zero;
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+	return 0;
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 }
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 /*
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@@ -82,25 +86,19 @@
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 	return 0;
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 }
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-static __be32 *
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-nul_validate(struct rpc_task *task, __be32 *p)
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+static int
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+nul_validate(struct rpc_task *task, struct xdr_stream *xdr)
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 {
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-	rpc_authflavor_t	flavor;
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-	u32			size;
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+	__be32 *p;
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-	flavor = ntohl(*p++);
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-	if (flavor != RPC_AUTH_NULL) {
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-		printk("RPC: bad verf flavor: %u\n", flavor);
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-		return ERR_PTR(-EIO);
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-	}
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-
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-	size = ntohl(*p++);
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-	if (size != 0) {
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-		printk("RPC: bad verf size: %u\n", size);
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-		return ERR_PTR(-EIO);
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-	}
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-
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-	return p;
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+	p = xdr_inline_decode(xdr, 2 * sizeof(*p));
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+	if (!p)
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+		return -EIO;
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+	if (*p++ != rpc_auth_null)
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+		return -EIO;
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+	if (*p != xdr_zero)
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+		return -EIO;
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+	return 0;
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 }
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 const struct rpc_authops authnull_ops = {
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@@ -116,21 +114,23 @@
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 struct rpc_auth null_auth = {
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 	.au_cslack	= NUL_CALLSLACK,
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 	.au_rslack	= NUL_REPLYSLACK,
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-	.au_flags	= RPCAUTH_AUTH_NO_CRKEY_TIMEOUT,
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+	.au_verfsize	= NUL_REPLYSLACK,
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+	.au_ralign	= NUL_REPLYSLACK,
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 	.au_ops		= &authnull_ops,
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 	.au_flavor	= RPC_AUTH_NULL,
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-	.au_count	= ATOMIC_INIT(0),
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+	.au_count	= REFCOUNT_INIT(1),
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 };
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 static
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 const struct rpc_credops null_credops = {
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 	.cr_name	= "AUTH_NULL",
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 	.crdestroy	= nul_destroy_cred,
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-	.crbind		= rpcauth_generic_bind_cred,
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 	.crmatch	= nul_match,
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 	.crmarshal	= nul_marshal,
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+	.crwrap_req	= rpcauth_wrap_req_encode,
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 	.crrefresh	= nul_refresh,
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 	.crvalidate	= nul_validate,
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+	.crunwrap_resp	= rpcauth_unwrap_resp_decode,
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 };
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 static
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@@ -138,6 +138,6 @@
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 	.cr_lru		= LIST_HEAD_INIT(null_cred.cr_lru),
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 	.cr_auth	= &null_auth,
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 	.cr_ops		= &null_credops,
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-	.cr_count	= ATOMIC_INIT(1),
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+	.cr_count	= REFCOUNT_INIT(2),
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 	.cr_flags	= 1UL << RPCAUTH_CRED_UPTODATE,
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 };