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Subject[PATCH 5.10 089/563] tee: fix put order in teedev_close_context()
Date
From: Jens Wiklander <jens.wiklander@linaro.org>

[ 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@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 6ade4a5c48407..dfc239c64ce3c 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


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