Check the return values of kmalloc()

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10599 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/switch/src/switch-core.c b/package/switch/src/switch-core.c
index e0aa541..87aa972 100644 (file)
--- a/package/switch/src/switch-core.c
+++ b/package/switch/src/switch-core.c
@@ -158,6 +158,8 @@ static void add_handler(switch_driver *driver, const switch_config *handler, str
 
        switch_proc_handler *tmp;
        tmp = (switch_proc_handler *) kmalloc(sizeof(switch_proc_handler), GFP_KERNEL);
+       if (!tmp)
+               return;
        INIT_LIST_HEAD(&tmp->list);
        tmp->parent = parent;
        tmp->nr = nr;
@@ -239,11 +241,26 @@ static int do_register(switch_driver *driver)
        switch_priv *priv;
        int i;
        char buf[4];
-       
-       if ((priv = kmalloc(sizeof(switch_priv), GFP_KERNEL)) == NULL)
-               return -ENOBUFS;
+
+       priv = kmalloc(sizeof(switch_priv), GFP_KERNEL);
+       if (!priv)
+               return -ENOMEM;
        driver->data = (void *) priv;
 
+       priv->ports = kmalloc((driver->ports + 1) * sizeof(struct proc_dir_entry *),
+                             GFP_KERNEL);
+       if (!priv->ports) {
+               kfree(priv);
+               return -ENOMEM;
+       }
+       priv->vlans = kmalloc((driver->vlans + 1) * sizeof(struct proc_dir_entry *),
+                             GFP_KERNEL);
+       if (!priv->vlans) {
+               kfree(priv->ports);
+               kfree(priv);
+               return -ENOMEM;
+       }
+
        INIT_LIST_HEAD(&priv->data.list);
        
        priv->nr = drv_num++;
@@ -254,7 +271,6 @@ static int do_register(switch_driver *driver)
        }
        
        priv->port_dir = proc_mkdir("port", priv->driver_dir);
-       priv->ports = kmalloc((driver->ports + 1) * sizeof(struct proc_dir_entry *), GFP_KERNEL);
        for (i = 0; i < driver->ports; i++) {
                sprintf(buf, "%d", i);
                priv->ports[i] = proc_mkdir(buf, priv->port_dir);
@@ -264,7 +280,6 @@ static int do_register(switch_driver *driver)
        priv->ports[i] = NULL;
        
        priv->vlan_dir = proc_mkdir("vlan", priv->driver_dir);
-       priv->vlans = kmalloc((driver->vlans + 1) * sizeof(struct proc_dir_entry *), GFP_KERNEL);
        for (i = 0; i < driver->vlans; i++) {
                sprintf(buf, "%d", i);
                priv->vlans[i] = proc_mkdir(buf, priv->vlan_dir);
@@ -339,6 +354,8 @@ switch_vlan_config *switch_parse_vlan(switch_driver *driver, char *buf)
        int j, u, p, s;
        
        c = kmalloc(sizeof(switch_vlan_config), GFP_KERNEL);
+       if (!c)
+               return NULL;
        memset(c, 0, sizeof(switch_vlan_config));
 
        while (isspace(*buf)) buf++;
@@ -392,7 +409,7 @@ int switch_register_driver(switch_driver *driver)
        struct list_head *pos;
        switch_driver *new;
        int ret;
-       
+
        list_for_each(pos, &drivers.list) {
                if (strcmp(list_entry(pos, switch_driver, list)->name, driver->name) == 0) {
                        printk("Switch driver '%s' already exists in the kernel\n", driver->name);
@@ -405,6 +422,8 @@ int switch_register_driver(switch_driver *driver)
        }
 
        new = kmalloc(sizeof(switch_driver), GFP_KERNEL);
+       if (!new)
+               return -ENOMEM;
        memcpy(new, driver, sizeof(switch_driver));
        new->name = strdup(driver->name);
        new->interface = strdup(driver->interface);