linux-kernel - [RFC][PATCH 02/22] x86 kvm page table walks: switch to explicit __get

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Message-Id: <20200323183819.250124-2-viro@ZenIV.linux.org.uk>
Date:   Mon, 23 Mar 2020 18:37:59 +0000
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC][PATCH 02/22] x86 kvm page table walks: switch to explicit __get_user()

From: Al Viro <viro@...iv.linux.org.uk>

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 arch/x86/kvm/mmu/paging_tmpl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 4e1ef0473663..5bea4cfe8a15 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -400,7 +400,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,
 			goto error;
 
 		ptep_user = (pt_element_t __user *)((void *)host_addr + offset);
-		if (unlikely(__copy_from_user(&pte, ptep_user, sizeof(pte))))
+		if (unlikely(__get_user(pte, ptep_user)))
 			goto error;
 		walker->ptep_user[walker->level - 1] = ptep_user;
 
-- 
2.11.0