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authorJulia Lawall <julia@diku.dk>2010-05-21 22:18:59 +0000
committerDavid S. Miller <davem@davemloft.net>2010-05-31 00:24:12 -0700
commitb23d00e9212d04eb894dd29422c7a53b36b8e32d (patch)
tree99b6a6f7e57edfc1b3f3ec5c70a02ba7e3de7573 /drivers/net/ppp_generic.c
parent16dff91804777efbb0ce18b0a7e54c55e86b7beb (diff)
drivers/net: Use memdup_user
Use memdup_user when user data is immediately copied into the allocated region. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression from,to,size,flag; position p; identifier l1,l2; @@ - to = \(kmalloc@p\|kzalloc@p\)(size,flag); + to = memdup_user(from,size); if ( - to==NULL + IS_ERR(to) || ...) { <+... when != goto l1; - -ENOMEM + PTR_ERR(to) ...+> } - if (copy_from_user(to, from, size) != 0) { - <+... when != goto l2; - -EFAULT - ...+> - } // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ppp_generic.c')
-rw-r--r--drivers/net/ppp_generic.c11
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index 144375dea2de..0db38946bc0a 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -538,14 +538,9 @@ static int get_filter(void __user *arg, struct sock_filter **p)
}
len = uprog.len * sizeof(struct sock_filter);
- code = kmalloc(len, GFP_KERNEL);
- if (code == NULL)
- return -ENOMEM;
-
- if (copy_from_user(code, uprog.filter, len)) {
- kfree(code);
- return -EFAULT;
- }
+ code = memdup_user(uprog.filter, len);
+ if (IS_ERR(code))
+ return PTR_ERR(code);
err = sk_chk_filter(code, uprog.len);
if (err) {