5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ma Ke <make_ruc2021@xxxxxxx> 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@xxxxxxx> Signed-off-by: Steffen Klassert <steffen.klassert@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/ipv4/esp4.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -741,7 +741,9 @@ static inline int esp_remove_trailer(str 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];
