[PATCH 5.16 0145/1039] tee: fix put order in teedev_close_context()

[Greg Kroah-Hartman]

From: Jens Wiklander <jens.wiklander@xxxxxxxxxx>

[ Upstream commit f18397ab3ae23e8e43bba9986e66af6d4497f2ad ]

Prior to this patch was teedev_close_context() calling tee_device_put()
before teedev_ctx_put() leading to teedev_ctx_release() accessing
ctx->teedev just after the reference counter was decreased on the
teedev. Fix this by calling teedev_ctx_put() before tee_device_put().

Fixes: 217e0250cccb ("tee: use reference counting for tee_context")
Reviewed-by: Sumit Garg <sumit.garg@xxxxxxxxxx>
Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/tee/tee_core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index 2b37bc408fc3d..85102d12d7169 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -98,8 +98,10 @@ void teedev_ctx_put(struct tee_context *ctx)
 
 static void teedev_close_context(struct tee_context *ctx)
 {
-	tee_device_put(ctx->teedev);
+	struct tee_device *teedev = ctx->teedev;
+
 	teedev_ctx_put(ctx);
+	tee_device_put(teedev);
 }
 
 static int tee_open(struct inode *inode, struct file *filp)
-- 
2.34.1