linux-kernel - [PATCH 5.10 21/79] net/core/skbuff: Check the return value of skb_copy

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Message-Id: <20220913140351.321635587@linuxfoundation.org>
Date:   Tue, 13 Sep 2022 16:04:26 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Li Zhong <floridsleeves@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 21/79] net/core/skbuff: Check the return value of skb_copy_bits()

From: lily <floridsleeves@...il.com>

[ Upstream commit c624c58e08b15105662b9ab9be23d14a6b945a49 ]

skb_copy_bits() could fail, which requires a check on the return
value.

Signed-off-by: Li Zhong <floridsleeves@...il.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/core/skbuff.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 635cabcf8794f..7bdcdad58dc86 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -3986,9 +3986,8 @@ struct sk_buff *skb_segment(struct sk_buff *head_skb,
 				SKB_GSO_CB(nskb)->csum_start =
 					skb_headroom(nskb) + doffset;
 			} else {
-				skb_copy_bits(head_skb, offset,
-					      skb_put(nskb, len),
-					      len);
+				if (skb_copy_bits(head_skb, offset, skb_put(nskb, len), len))
+					goto err;
 			}
 			continue;
 		}
-- 
2.35.1