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authorMarkus Elfring <elfring@users.sourceforge.net>2018-03-05 13:50:13 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2018-03-16 23:33:29 +0800
commit6c51ddddac46ab124a3f10fd17cf34979670c1ce (patch)
treea5fc13cdbc5f27a49eafab015647cd1802797254 /drivers/crypto/ccp
parent0ee991be4cdd88587aedbf68cdacd1765f57236a (diff)
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>
Diffstat (limited to 'drivers/crypto/ccp')
-rw-r--r--drivers/crypto/ccp/psp-dev.c15
1 files changed, 1 insertions, 14 deletions
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index b3afb6cc9d72..d95ec526587a 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -367,8 +367,6 @@ e_free:
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);