diff options
Diffstat (limited to 'drivers/staging/rtl8188eu/os_dep/rtw_android.c')
-rw-r--r-- | drivers/staging/rtl8188eu/os_dep/rtw_android.c | 41 |
1 files changed, 13 insertions, 28 deletions
diff --git a/drivers/staging/rtl8188eu/os_dep/rtw_android.c b/drivers/staging/rtl8188eu/os_dep/rtw_android.c index d9d55d12fd5f..99ce077007f4 100644 --- a/drivers/staging/rtl8188eu/os_dep/rtw_android.c +++ b/drivers/staging/rtl8188eu/os_dep/rtw_android.c @@ -148,36 +148,21 @@ static int rtw_android_set_block(struct net_device *net, char *command, int rtw_android_priv_cmd(struct net_device *net, struct ifreq *ifr, int cmd) { int ret = 0; - char *command = NULL; + char *command; int cmd_num; int bytes_written = 0; struct android_wifi_priv_cmd priv_cmd; - if (!ifr->ifr_data) { - ret = -EINVAL; - goto exit; - } - if (copy_from_user(&priv_cmd, ifr->ifr_data, - sizeof(struct android_wifi_priv_cmd))) { - ret = -EFAULT; - goto exit; - } - command = kmalloc(priv_cmd.total_len, GFP_KERNEL); - if (!command) { - DBG_88E("%s: failed to allocate memory\n", __func__); - ret = -ENOMEM; - goto exit; - } - if (!access_ok(VERIFY_READ, priv_cmd.buf, priv_cmd.total_len)) { - DBG_88E("%s: failed to access memory\n", __func__); - ret = -EFAULT; - goto exit; - } - if (copy_from_user(command, (char __user *)priv_cmd.buf, - priv_cmd.total_len)) { - ret = -EFAULT; - goto exit; - } + if (!ifr->ifr_data) + return -EINVAL; + if (copy_from_user(&priv_cmd, ifr->ifr_data, sizeof(priv_cmd))) + return -EFAULT; + if (priv_cmd.total_len < 1) + return -EINVAL; + command = memdup_user(priv_cmd.buf, priv_cmd.total_len); + if (IS_ERR(command)) + return PTR_ERR(command); + command[priv_cmd.total_len - 1] = 0; DBG_88E("%s: Android private cmd \"%s\" on %s\n", __func__, command, ifr->ifr_name); cmd_num = rtw_android_cmdstr_to_num(command); @@ -191,7 +176,7 @@ int rtw_android_priv_cmd(struct net_device *net, struct ifreq *ifr, int cmd) DBG_88E("%s: Ignore private cmd \"%s\" - iface %s is down\n", __func__, command, ifr->ifr_name); ret = 0; - goto exit; + goto free; } switch (cmd_num) { case ANDROID_WIFI_CMD_STOP: @@ -279,7 +264,7 @@ response: } else { ret = bytes_written; } -exit: +free: kfree(command); return ret; } |