From: Jakub Kicinski jakub.kicinski@netronome.com
[ Upstream commit c3f4a6c39cf269a40d45f813c05fa830318ad875 ]
On device surprise removal path (the notifier) we can't bail just because the features are disabled. They may have been enabled during the lifetime of the device. This bug leads to leaking netdev references and use-after-frees if there are active connections while device features are cleared.
Fixes: e8f69799810c ("net/tls: Add generic NIC offload infrastructure") Signed-off-by: Jakub Kicinski jakub.kicinski@netronome.com Reviewed-by: Dirk van der Merwe dirk.vandermerwe@netronome.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/tls/tls_device.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -974,7 +974,8 @@ static int tls_dev_event(struct notifier { struct net_device *dev = netdev_notifier_info_to_dev(ptr);
- if (!(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX))) + if (!dev->tlsdev_ops && + !(dev->features & (NETIF_F_HW_TLS_RX | NETIF_F_HW_TLS_TX))) return NOTIFY_DONE;
switch (event) {