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net: ipv4: fix return value check in esp_remove_trailer

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commit 513f61e2193350c7a345da98559b80f61aec4fa6 upstream.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ma Ke 2023-10-09 09:13:37 +08:00 • committed by Ksawlii
parent 7c13002e9b
commit be58faad84
1 changed files with 3 additions and 1 deletions
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4
net/ipv4/esp4.c
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@ -741,7 +741,9 @@ 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];