From 3026050179a3a9a6f5c892c414b5e36ecf092081 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Fri, 21 Apr 2017 13:39:09 +0300 Subject: [PATCH] HSI: ssi_protocol: double free in ssip_pn_xmit() If skb_pad() fails then it frees skb and we don't need to free it again at the end of the function. Fixes: dc7bf5d7 ("HSI: Introduce driver for SSI Protocol") Signed-off-by: Dan Carpenter Signed-off-by: Sebastian Reichel --- drivers/hsi/clients/ssi_protocol.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c index 7ef819680acd..26b05106f0d3 100644 --- a/drivers/hsi/clients/ssi_protocol.c +++ b/drivers/hsi/clients/ssi_protocol.c @@ -980,7 +980,7 @@ static int ssip_pn_xmit(struct sk_buff *skb, struct net_device *dev) goto drop; /* Pad to 32-bits - FIXME: Revisit*/ if ((skb->len & 3) && skb_pad(skb, 4 - (skb->len & 3))) - goto drop; + goto inc_dropped; /* * Modem sends Phonet messages over SSI with its own endianess... @@ -1032,8 +1032,9 @@ static int ssip_pn_xmit(struct sk_buff *skb, struct net_device *dev) drop2: hsi_free_msg(msg); drop: - dev->stats.tx_dropped++; dev_kfree_skb(skb); +inc_dropped: + dev->stats.tx_dropped++; return 0; } -- GitLab