target/iblock: Use match_strlcpy for Opt_udev_path string assignment

Following commit dbc6e0222 from Al Viro for fileio, go ahead and make
Opt_udev_path within iblock_set_configfs_dev_params use match_strlcpy
instead of the match_strdup -> snprintf -> kfree equivalent.

Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 9ba495477fd2..0f6ece80bffe 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -454,14 +454,11 @@ static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba,
                                 ret = -EEXIST;
                                 goto out;
                         }
-                        arg_p = match_strdup(&args[0]);
-                        if (!arg_p) {
-                                ret = -ENOMEM;
+                        if (match_strlcpy(ib_dev->ibd_udev_path, &args[0],
+                                SE_UDEV_PATH_LEN) == 0) {
+                                ret = -EINVAL;
                                 break;
                         }
-                        snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN,
-                                        "%s", arg_p);
-                        kfree(arg_p);
                         pr_debug("IBLOCK: Referencing UDEV path: %s\n",
                                         ib_dev->ibd_udev_path);
                         ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH;