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tee: fix put order in teedev_close_context()

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[ 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: 217e0250cc ("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>
This commit is contained in:
Jens Wiklander 2021-06-15 22:23:50 +02:00 committed by Greg Kroah-Hartman
parent 4a14914323
commit 564a7ca7b4
1 changed files with 3 additions and 1 deletions
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4
drivers/tee/tee_core.c
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@ -96,8 +96,10 @@ 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_release(struct inode *inode, struct file *filp)