diff mbox series

[AUTOSEL,4.19,096/123] rapidio/rionet: do not free skb before reading its length

Message ID 20181205093555.5386-96-sashal@kernel.org
State Not Applicable, archived
Delegated to: David Miller
Headers show
Series None | expand

Commit Message

Sasha Levin Dec. 5, 2018, 9:35 a.m. UTC 
From: Pan Bian <bianpan2016@163.com>

[ Upstream commit cfc435198f53a6fa1f656d98466b24967ff457d0 ]

skb is freed via dev_kfree_skb_any, however, skb->len is read then. This
may result in a use-after-free bug.

Fixes: e6161d64263 ("rapidio/rionet: rework driver initialization and removal")
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/rionet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c
index e9f101c9bae2..bfbb39f93554 100644
--- a/drivers/net/rionet.c
+++ b/drivers/net/rionet.c
@@ -216,9 +216,9 @@  static int rionet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
 			 * it just report sending a packet to the target
 			 * (without actual packet transfer).
 			 */
-			dev_kfree_skb_any(skb);
 			ndev->stats.tx_packets++;
 			ndev->stats.tx_bytes += skb->len;
+			dev_kfree_skb_any(skb);
 		}
 	}