From aa7cb3789b429d4fdfbe767e0e0cf8c769299d7a Mon Sep 17 00:00:00 2001 From: Yuanjun Gong Date: Mon, 17 Jul 2023 22:49:18 +0800 Subject: [PATCH] ipv4: ip_gre: fix return value check in erspan_xmit() goto free_skb if an unexpected result is returned by pskb_tirm() in erspan_xmit(). Signed-off-by: Yuanjun Gong Reviewed-by: Kuniyuki Iwashima Signed-off-by: David S. Miller --- net/ipv4/ip_gre.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 914cc94..22a26d1 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -690,7 +690,8 @@ static netdev_tx_t erspan_xmit(struct sk_buff *skb, goto free_skb; if (skb->len > dev->mtu + dev->hard_header_len) { - pskb_trim(skb, dev->mtu + dev->hard_header_len); + if (pskb_trim(skb, dev->mtu + dev->hard_header_len)) + goto free_skb; truncate = true; } -- 2.7.4