[PATCH] net: ipv6: fix return value check in esp_remove_trailer

From: Ma Ke
Date: Fri Oct 06 2023 - 21:01:42 EST


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@xxxxxxx>
---
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 fddd0cbdede1..e023d29e919c 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -770,7 +770,9 @@ 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];

--
2.37.2