Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.0 30/36] net/tls: dont ignore netdev notifications if no TLS features | Date | Mon, 3 Jun 2019 11:09:18 +0200 |
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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 @@ -981,7 +981,8 @@ 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) {
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