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Subject[PATCH] net: xfrm: fix return value check in ipcomp_compress
Date
In ipcomp_compress, 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>
---
net/xfrm/xfrm_ipcomp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/xfrm/xfrm_ipcomp.c b/net/xfrm/xfrm_ipcomp.c
index 9c0fa0e1786a..5f2e6edadf48 100644
--- a/net/xfrm/xfrm_ipcomp.c
+++ b/net/xfrm/xfrm_ipcomp.c
@@ -144,7 +144,9 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
memcpy(start + sizeof(struct ip_comp_hdr), scratch, dlen);
local_bh_enable();

- pskb_trim(skb, dlen + sizeof(struct ip_comp_hdr));
+ err = pskb_trim(skb, dlen + sizeof(struct ip_comp_hdr));
+ if (unlikely(err))
+ goto out;
return 0;

out:
--
2.37.2
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