From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 24 Nov 2021 17:54:04 +0300
Subject: tee: amdtee: fix an IS_ERR() vs NULL bug
Git-commit: 9d7482771fac8d8e38e763263f2ca0ca12dd22c6
Patch-mainline: v5.16-rc6
References: jsc#SLE-21844
The __get_free_pages() function does not return error pointers it returns
NULL so fix this condition to avoid a NULL dereference.
Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
drivers/tee/amdtee/core.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/tee/amdtee/core.c b/drivers/tee/amdtee/core.c
index da6b88e80dc07..297dc62bca298 100644
--- a/drivers/tee/amdtee/core.c
+++ b/drivers/tee/amdtee/core.c
@@ -203,9 +203,8 @@ static int copy_ta_binary(struct tee_context *ctx, void *ptr, void **ta,
*ta_size = roundup(fw->size, PAGE_SIZE);
*ta = (void *)__get_free_pages(GFP_KERNEL, get_order(*ta_size));
- if (IS_ERR(*ta)) {
- pr_err("%s: get_free_pages failed 0x%llx\n", __func__,
- (u64)*ta);
+ if (!*ta) {
+ pr_err("%s: get_free_pages failed\n", __func__);
rc = -ENOMEM;
goto rel_fw;
}
--
2.33.1