linux-kernel - [PATCH 5.9 016/391] tee: client UUID: Skip REE kernel login method as well

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Date:   Tue,  3 Nov 2020 21:31:07 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sumit Garg <sumit.garg@...aro.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.9 016/391] tee: client UUID: Skip REE kernel login method as well

From: Sumit Garg <sumit.garg@...aro.org>

[ Upstream commit 722939528a37aa0cb22d441e2045c0cf53e78fb0 ]

Since the addition of session's client UUID generation via commit [1],
login via REE kernel method was disallowed. So fix that via passing
nill UUID in case of TEE_IOCTL_LOGIN_REE_KERNEL method as well.

Fixes: e33bcbab16d1 ("tee: add support for session's client UUID generation") [1]
Signed-off-by: Sumit Garg <sumit.garg@...aro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@...aro.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/tee/tee_core.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index 64637e09a0953..2f6199ebf7698 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -200,7 +200,8 @@ int tee_session_calc_client_uuid(uuid_t *uuid, u32 connection_method,
 	int name_len;
 	int rc;
 
-	if (connection_method == TEE_IOCTL_LOGIN_PUBLIC) {
+	if (connection_method == TEE_IOCTL_LOGIN_PUBLIC ||
+	    connection_method == TEE_IOCTL_LOGIN_REE_KERNEL) {
 		/* Nil UUID to be passed to TEE environment */
 		uuid_copy(uuid, &uuid_null);
 		return 0;
-- 
2.27.0