diff options
Diffstat (limited to 'net/netlink/af_netlink.c')
-rw-r--r-- | net/netlink/af_netlink.c | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 1ab0da2632e1..e6b636d53633 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c | |||
@@ -1344,22 +1344,6 @@ static void netlink_data_ready(struct sock *sk, int len) | |||
1344 | * queueing. | 1344 | * queueing. |
1345 | */ | 1345 | */ |
1346 | 1346 | ||
1347 | static void __netlink_release(struct sock *sk) | ||
1348 | { | ||
1349 | /* | ||
1350 | * Last sock_put should drop referrence to sk->sk_net. It has already | ||
1351 | * been dropped in netlink_kernel_create. Taking referrence to stopping | ||
1352 | * namespace is not an option. | ||
1353 | * Take referrence to a socket to remove it from netlink lookup table | ||
1354 | * _alive_ and after that destroy it in the context of init_net. | ||
1355 | */ | ||
1356 | |||
1357 | sock_hold(sk); | ||
1358 | sock_release(sk->sk_socket); | ||
1359 | sk->sk_net = get_net(&init_net); | ||
1360 | sock_put(sk); | ||
1361 | } | ||
1362 | |||
1363 | struct sock * | 1347 | struct sock * |
1364 | netlink_kernel_create(struct net *net, int unit, unsigned int groups, | 1348 | netlink_kernel_create(struct net *net, int unit, unsigned int groups, |
1365 | void (*input)(struct sk_buff *skb), | 1349 | void (*input)(struct sk_buff *skb), |
@@ -1424,7 +1408,7 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups, | |||
1424 | 1408 | ||
1425 | out_sock_release: | 1409 | out_sock_release: |
1426 | kfree(listeners); | 1410 | kfree(listeners); |
1427 | __netlink_release(sk); | 1411 | netlink_kernel_release(sk); |
1428 | return NULL; | 1412 | return NULL; |
1429 | 1413 | ||
1430 | out_sock_release_nosk: | 1414 | out_sock_release_nosk: |
@@ -1437,10 +1421,20 @@ EXPORT_SYMBOL(netlink_kernel_create); | |||
1437 | void | 1421 | void |
1438 | netlink_kernel_release(struct sock *sk) | 1422 | netlink_kernel_release(struct sock *sk) |
1439 | { | 1423 | { |
1424 | /* | ||
1425 | * Last sock_put should drop referrence to sk->sk_net. It has already | ||
1426 | * been dropped in netlink_kernel_create. Taking referrence to stopping | ||
1427 | * namespace is not an option. | ||
1428 | * Take referrence to a socket to remove it from netlink lookup table | ||
1429 | * _alive_ and after that destroy it in the context of init_net. | ||
1430 | */ | ||
1440 | if (sk == NULL || sk->sk_socket == NULL) | 1431 | if (sk == NULL || sk->sk_socket == NULL) |
1441 | return; | 1432 | return; |
1442 | 1433 | ||
1443 | __netlink_release(sk); | 1434 | sock_hold(sk); |
1435 | sock_release(sk->sk_socket); | ||
1436 | sk->sk_net = get_net(&init_net); | ||
1437 | sock_put(sk); | ||
1444 | } | 1438 | } |
1445 | EXPORT_SYMBOL(netlink_kernel_release); | 1439 | EXPORT_SYMBOL(netlink_kernel_release); |
1446 | 1440 | ||