This is a note to let you know that I've just added the patch titled
tee: amdtee: fix an IS_ERR() vs NULL bug
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tee-amdtee-fix-an-is_err-vs-null-bug.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 34e7341d6fc4351d9d96ae81f1a6dc34fa60452f
Author: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Wed Nov 24 17:54:04 2021 +0300
tee: amdtee: fix an IS_ERR() vs NULL bug
[ Upstream commit 9d7482771fac8d8e38e763263f2ca0ca12dd22c6 ]
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@xxxxxxxxxx>
Acked-by: Rijo Thomas <Rijo-john.Thomas@xxxxxxx>
Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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;
}
