linux-kernel - [PATCH 5.16 098/203] tee: optee: do not check memref size on return from Secure World

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Date:   Mon, 14 Feb 2022 10:25:42 +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, Jerome Forissier <jerome@...issier.org>,
        Sumit Garg <sumit.garg@...aro.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.16 098/203] tee: optee: do not check memref size on return from Secure World

From: Jerome Forissier <jerome@...issier.org>

[ Upstream commit abc8dc34d1f6e34ed346c6e3fc554127e421b769 ]

Commit c650b8dc7a79 ("tee: optee: do not check memref size on return
from Secure World") was mistakenly lost in commit 4602c5842f64 ("optee:
refactor driver with internal callbacks"). Remove the unwanted code
again.

Fixes: 4602c5842f64 ("optee: refactor driver with internal callbacks")
Signed-off-by: Jerome Forissier <jerome@...issier.org>
Reviewed-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/optee/smc_abi.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/tee/optee/smc_abi.c b/drivers/tee/optee/smc_abi.c
index cf2e3293567d9..09e7ec673bb6b 100644
--- a/drivers/tee/optee/smc_abi.c
+++ b/drivers/tee/optee/smc_abi.c
@@ -71,16 +71,6 @@ static int from_msg_param_tmp_mem(struct tee_param *p, u32 attr,
 	p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
 	p->u.memref.shm = shm;
 
-	/* Check that the memref is covered by the shm object */
-	if (p->u.memref.size) {
-		size_t o = p->u.memref.shm_offs +
-			   p->u.memref.size - 1;
-
-		rc = tee_shm_get_pa(shm, o, NULL);
-		if (rc)
-			return rc;
-	}
-
 	return 0;
 }
 
-- 
2.34.1