From 4408dd15d9cfcf78b819d2d4a5b43dc36056cab8 Mon Sep 17 00:00:00 2001 From: Andre Guedes Date: Mon, 24 Mar 2014 16:08:48 -0300 Subject: [PATCH] Bluetooth: Use memdup_user in le_auto_conn_write() This patch does a small code simplification replacing the tipical kmalloc-copy_from_user sequence by memdup_user() helper. Cc: Fengguang Wu Signed-off-by: Andre Guedes Signed-off-by: Marcel Holtmann --- net/bluetooth/hci_core.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 1c6ffaa8902f..bfc6f810554e 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -955,14 +955,9 @@ static ssize_t le_auto_conn_write(struct file *file, const char __user *data, if (count < 3) return -EINVAL; - buf = kzalloc(count, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - if (copy_from_user(buf, data, count)) { - err = -EFAULT; - goto done; - } + buf = memdup_user(data, count); + if (IS_ERR(buf)) + return PTR_ERR(buf); if (memcmp(buf, "add", 3) == 0) { n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu", -- 2.11.0