[PATCH 4/4] vmci_host: get rid of pointless access_ok()

From: Al Viro
Date: Sat May 09 2020 - 19:46:35 EST


From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

get_user_pages_fast() doesn't need the caller to check that.
NB: reachable only from ioctl(2) and only under USER_DS

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
drivers/misc/vmw_vmci/vmci_host.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c
index ce16d6b99295..2d8328d928d5 100644
--- a/drivers/misc/vmw_vmci/vmci_host.c
+++ b/drivers/misc/vmw_vmci/vmci_host.c
@@ -233,8 +233,6 @@ static int vmci_host_setup_notify(struct vmci_ctx *context,
* about the size.
*/
BUILD_BUG_ON(sizeof(bool) != sizeof(u8));
- if (!access_ok((void __user *)uva, sizeof(u8)))
- return VMCI_ERROR_GENERIC;

/*
* Lock physical page backing a given user VA.
--
2.11.0