diff mbox series

[16/20] efi_test: get rid of pointless access_ok()

Message ID 20200509234557.1124086-16-viro@ZenIV.linux.org.uk (mailing list archive)
State New, archived
Headers show
Series [01/20] dlmfs_file_write(): get rid of pointless access_ok() | expand

Commit Message

Al Viro May 9, 2020, 11:45 p.m. UTC 
From: Al Viro <viro@zeniv.linux.org.uk>

really, people - get_user(), copy_from_user(), memdup_user(), etc.
all fail if access_ok() does.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 drivers/firmware/efi/test/efi_test.c | 12 ------------
 1 file changed, 12 deletions(-)
diff mbox series

Patch

diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c
index 7baf48c01e72..ddf9eae396fe 100644
--- a/drivers/firmware/efi/test/efi_test.c
+++ b/drivers/firmware/efi/test/efi_test.c
@@ -70,9 +70,6 @@  copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
 		return 0;
 	}
 
-	if (!access_ok(src, 1))
-		return -EFAULT;
-
 	buf = memdup_user(src, len);
 	if (IS_ERR(buf)) {
 		*dst = NULL;
@@ -91,9 +88,6 @@  copy_ucs2_from_user_len(efi_char16_t **dst, efi_char16_t __user *src,
 static inline int
 get_ucs2_strsize_from_user(efi_char16_t __user *src, size_t *len)
 {
-	if (!access_ok(src, 1))
-		return -EFAULT;
-
 	*len = user_ucs2_strsize(src);
 	if (*len == 0)
 		return -EFAULT;
@@ -118,9 +112,6 @@  copy_ucs2_from_user(efi_char16_t **dst, efi_char16_t __user *src)
 {
 	size_t len;
 
-	if (!access_ok(src, 1))
-		return -EFAULT;
-
 	len = user_ucs2_strsize(src);
 	if (len == 0)
 		return -EFAULT;
@@ -142,9 +133,6 @@  copy_ucs2_to_user_len(efi_char16_t __user *dst, efi_char16_t *src, size_t len)
 	if (!src)
 		return 0;
 
-	if (!access_ok(dst, 1))
-		return -EFAULT;
-
 	return copy_to_user(dst, src, len);
 }