[PATCH] net: ipv4: fix return value check in esp_remove_trailer
From: Ma Ke <hidden>
Date: 2023-10-09 01:15:07
Also in:
lkml
Subsystem:
networking [general], networking [ipsec], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Steffen Klassert, Herbert Xu, Linus Torvalds
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 <redacted> --- net/ipv4/esp4.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 2be2d4922557..d18f0f092fe7 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c@@ -732,7 +732,9 @@ 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];
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2.37.2