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Date: Sun, 03 Feb 2019 14:45:08 +0100 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>, "Pan Bian" <bianpan2016@....com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 3.16 243/305] rapidio/rionet: do not free skb before reading its length 3.16.63-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Pan Bian <bianpan2016@....com> commit cfc435198f53a6fa1f656d98466b24967ff457d0 upstream. 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@....com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- drivers/net/rionet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/rionet.c +++ b/drivers/net/rionet.c @@ -215,9 +215,9 @@ static int rionet_start_xmit(struct sk_b * 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); } }
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