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Staging: batman-adv: fix module initialization

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Make sure that batman-adv does not process packets before its
initialization is complete. Some sanity checks added to the receiver
function.

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Marek Lindner 2010-02-19 16:18:11 +01:00 committed by Greg Kroah-Hartman
parent da6d6c7ac3
commit af71b816cd
2 changed files with 13 additions and 11 deletions
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7
drivers/staging/batman-adv/hard-interface.c
View file

@ -432,6 +432,9 @@ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
if (!skb)
goto err_out;
if (atomic_read(&module_state) != MODULE_ACTIVE)
goto err_free;
/* packet should hold at least type and version */
if (unlikely(skb_headlen(skb) < 2))
goto err_free;
@ -445,6 +448,10 @@ int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
if (!batman_if)
goto err_free;
/* discard frames on not active interfaces */
if (batman_if->if_active != IF_ACTIVE)
goto err_free;
stats = (struct net_device_stats *)dev_get_stats(skb->dev);
if (stats) {
stats->rx_packets++;

17
drivers/staging/batman-adv/proc.c
View file

@ -63,7 +63,7 @@ static ssize_t proc_interfaces_write(struct file *instance,
size_t count, loff_t *data)
{
char *if_string, *colon_ptr = NULL, *cr_ptr = NULL;
int not_copied = 0, if_num = 0;
int not_copied = 0, if_num = 0, add_success;
struct batman_if *batman_if = NULL;
if_string = kmalloc(count, GFP_KERNEL);
@ -109,22 +109,17 @@ static ssize_t proc_interfaces_write(struct file *instance,
}
rcu_read_unlock();
hardif_add_interface(if_string, if_num);
add_success = hardif_add_interface(if_string, if_num);
if (add_success < 0)
goto end;
num_ifs = if_num + 1;
if ((atomic_read(&module_state) == MODULE_INACTIVE) &&
(hardif_get_active_if_num() > 0))
activate_module();
rcu_read_lock();
if (list_empty(&if_list)) {
rcu_read_unlock();
goto end;
}
rcu_read_unlock();
num_ifs = if_num + 1;
return count;
end:
kfree(if_string);
return count;