Fixing coccicheck warning which recommends to use memdup_user instead
to reimplement its code, using memdup_user simplifies the code
./drivers/tty/vt/keyboard.c:1709:9-16: WARNING opportunity for memdup_user
./drivers/tty/vt/keyboard.c:1752:9-16: WARNING opportunity for memdup_user
Signed-off-by: Rahul Pathak <rahulpathakli...@gmail.com>
---
drivers/tty/vt/keyboard.c | 28 ++++++++--------------------
1 file changed, 8 insertions(+), 20 deletions(-)
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index 6f0336f..ec05360 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -1706,16 +1706,10 @@ int vt_do_diacrit(unsigned int cmd, void __user *udp,
int perm)
return -EINVAL;
if (ct) {
- dia = kmalloc(sizeof(struct kbdiacr) * ct,
- GFP_KERNEL);
- if (!dia)
- return -ENOMEM;
-
- if (copy_from_user(dia, a->kbdiacr,
- sizeof(struct kbdiacr) * ct)) {
- kfree(dia);
- return -EFAULT;
- }
+ dia = memdup_user(a->kbdiacr,
+ sizeof(struct kbdiacr) * ct);
+ if (IS_ERR(dia))
+ return PTR_ERR(dia);
}
spin_lock_irqsave(&kbd_event_lock, flags);
@@ -1749,16 +1743,10 @@ int vt_do_diacrit(unsigned int cmd, void __user *udp,
int perm)
return -EINVAL;
if (ct) {
- buf = kmalloc(ct * sizeof(struct kbdiacruc),
- GFP_KERNEL);
- if (buf == NULL)
- return -ENOMEM;
-
- if (copy_from_user(buf, a->kbdiacruc,
- ct * sizeof(struct kbdiacruc))) {
- kfree(buf);
- return -EFAULT;
- }
+ buf = memdup_user(a->kbdiacruc,
+ sizeof(struct kbdiacruc) * ct);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
}
spin_lock_irqsave(&kbd_event_lock, flags);
if (ct)
--
2.1.4
--
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