dm crypt: use kstrdup

Use kstrdup when the goal of an allocation is copy a string into the
allocated region.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to;
expression flag,E1,E2;
statement S;
@@

-  to = kmalloc(strlen(from) + 1,flag);
+  to = kstrdup(from, flag);
   ... when != \(from = E1 \| to = E1 \)
   if (to==NULL || ...) S
   ... when != \(from = E2 \| to = E2 \)
-  strcpy(to, from);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 3bdbb61..a8aab9c 100644 (file)
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1168,12 +1168,11 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
        if (ivmode && cc->iv_gen_ops) {
                if (ivopts)
                        *(ivopts - 1) = ':';
-               cc->iv_mode = kmalloc(strlen(ivmode) + 1, GFP_KERNEL);
+               cc->iv_mode = kstrdup(ivmode, GFP_KERNEL);
                if (!cc->iv_mode) {
                        ti->error = "Error kmallocing iv_mode string";
                        goto bad_ivmode_string;
                }
-               strcpy(cc->iv_mode, ivmode);
        } else
                cc->iv_mode = NULL;