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From c1255479db311904c69b38aaa83c8c1de96b29c9 Mon Sep 17 00:00:00 2001
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Mon, 5 Mar 2018 13:50:13 +0100
Subject: [PATCH 37/95] crypto: ccp - Use memdup_user() rather than duplicating
its implementation
Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sudheesh Mavila <sudheesh.mavila@amd.com>
---
drivers/crypto/ccp/psp-dev.c | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index b3afb6c..d95ec52 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -367,8 +367,6 @@ static int sev_ioctl_do_pek_csr(struct sev_issue_cmd *argp)
void *psp_copy_user_blob(u64 __user uaddr, u32 len)
{
- void *data;
-
if (!uaddr || !len)
return ERR_PTR(-EINVAL);
@@ -376,18 +374,7 @@ void *psp_copy_user_blob(u64 __user uaddr, u32 len)
if (len > SEV_FW_BLOB_MAX_SIZE)
return ERR_PTR(-EINVAL);
- data = kmalloc(len, GFP_KERNEL);
- if (!data)
- return ERR_PTR(-ENOMEM);
-
- if (copy_from_user(data, (void __user *)(uintptr_t)uaddr, len))
- goto e_free;
-
- return data;
-
-e_free:
- kfree(data);
- return ERR_PTR(-EFAULT);
+ return memdup_user((void __user *)(uintptr_t)uaddr, len);
}
EXPORT_SYMBOL_GPL(psp_copy_user_blob);
--
2.7.4
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