From: Ma Ke make_ruc2021@163.com
[ Upstream commit dad4e491e30b20f4dc615c9da65d2142d703b5c2 ]
In esp_remove_trailer(), to avoid an unexpected result returned by pskb_trim, we should check the return value of pskb_trim().
Signed-off-by: Ma Ke make_ruc2021@163.com Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv6/esp6.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index e19624245e167..25c12d0ccd284 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -499,7 +499,9 @@ static inline int esp_remove_trailer(struct sk_buff *skb) skb->csum = csum_block_sub(skb->csum, csumdiff, skb->len - trimlen); } - pskb_trim(skb, skb->len - trimlen); + ret = pskb_trim(skb, skb->len - trimlen); + if (unlikely(ret)) + return ret;
ret = nexthdr[1];