[B.A.T.M.A.N.] [PATCH maint] batman-adv: check return value of pskb_trim_rcsum()

Marek Lindner
2013-05-07T11:25:02Z

Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
---
network-coding.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/network-coding.c b/network-coding.c
index f7c5430..e84629e 100644
--- a/network-coding.c
+++ b/network-coding.c
@@ -1514,6 +1514,7 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb,
struct ethhdr *ethhdr, ethhdr_tmp;
uint8_t *orig_dest, ttl, ttvn;
unsigned int coding_len;
+ int err;

/* Save headers temporarily */
memcpy(&coded_packet_tmp, skb->data, sizeof(coded_packet_tmp));
@@ -1568,8 +1569,11 @@ batadv_nc_skb_decode_packet(struct batadv_priv *bat_priv, struct sk_buff *skb,
coding_len);

/* Resize decoded skb if decoded with larger packet */
- if (nc_packet->skb->len > coding_len + h_size)
- pskb_trim_rcsum(skb, coding_len + h_size);
+ if (nc_packet->skb->len > coding_len + h_size) {
+ err = pskb_trim_rcsum(skb, coding_len + h_size);
+ if (err)
+ return NULL;
+ }

/* Create decoded unicast packet */
unicast_packet = (struct batadv_unicast_packet *)skb->data;
--
1.7.10.4