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Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/af_netlink.c1
-rw-r--r--net/netlink/af_netlink.h1
-rw-r--r--net/netlink/diag.c3
3 files changed, 5 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 479a344563d8..a324b4b34c90 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -104,6 +104,7 @@ static atomic_t nl_table_users = ATOMIC_INIT(0);
/* Protects netlink socket hash table mutations */
DEFINE_MUTEX(nl_sk_hash_lock);
+EXPORT_SYMBOL_GPL(nl_sk_hash_lock);
static int lockdep_nl_sk_hash_is_held(void)
{
diff --git a/net/netlink/af_netlink.h b/net/netlink/af_netlink.h
index 60f631fb7087..b20a1731759b 100644
--- a/net/netlink/af_netlink.h
+++ b/net/netlink/af_netlink.h
@@ -73,5 +73,6 @@ struct netlink_table {
extern struct netlink_table *nl_table;
extern rwlock_t nl_table_lock;
+extern struct mutex nl_sk_hash_lock;
#endif
diff --git a/net/netlink/diag.c b/net/netlink/diag.c
index 7301850eb56f..de8c74a3c061 100644
--- a/net/netlink/diag.c
+++ b/net/netlink/diag.c
@@ -170,6 +170,7 @@ static int netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
req = nlmsg_data(cb->nlh);
+ mutex_lock(&nl_sk_hash_lock);
read_lock(&nl_table_lock);
if (req->sdiag_protocol == NDIAG_PROTO_ALL) {
@@ -183,6 +184,7 @@ static int netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
} else {
if (req->sdiag_protocol >= MAX_LINKS) {
read_unlock(&nl_table_lock);
+ mutex_unlock(&nl_sk_hash_lock);
return -ENOENT;
}
@@ -190,6 +192,7 @@ static int netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
}
read_unlock(&nl_table_lock);
+ mutex_unlock(&nl_sk_hash_lock);
return skb->len;
}