From d4edb50688652eb10be270bc515da63815de428f Mon Sep 17 00:00:00 2001 From: Artem Chernyshev Date: Thu, 1 Dec 2022 17:00:31 +0300 Subject: net: dsa: hellcreek: Check return value Return NULL if we got unexpected value from skb_trim_rcsum() in hellcreek_rcv() Fixes: 01ef09caad66 ("net: dsa: Add tag handling for Hirschmann Hellcreek switches") Signed-off-by: Artem Chernyshev Reviewed-by: Florian Fainelli Reviewed-by: Kurt Kanzenbach Link: https://lore.kernel.org/r/20221201140032.26746-2-artem.chernyshev@red-soft.ru Signed-off-by: Jakub Kicinski --- net/dsa/tag_hellcreek.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/dsa/tag_hellcreek.c') diff --git a/net/dsa/tag_hellcreek.c b/net/dsa/tag_hellcreek.c index 846588c0070a..53a206d11685 100644 --- a/net/dsa/tag_hellcreek.c +++ b/net/dsa/tag_hellcreek.c @@ -49,7 +49,8 @@ static struct sk_buff *hellcreek_rcv(struct sk_buff *skb, return NULL; } - pskb_trim_rcsum(skb, skb->len - HELLCREEK_TAG_LEN); + if (pskb_trim_rcsum(skb, skb->len - HELLCREEK_TAG_LEN)) + return NULL; dsa_default_offload_fwd_mark(skb); -- cgit v1.2.3