5.4-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make_ruc2021@163.com
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 --- net/ipv4/esp4.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -567,7 +567,9 @@ 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];