From: Alexander Drozdov <al.drozdov@gmail.com>
To: "David S. Miller" <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
James Morris <jmorris@namei.org>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Alexander Drozdov <al.drozdov@gmail.com>
Subject: [PATCH] ipv4: ip_check_defrag should correctly check return value of skb_copy_bits
Date: Tue, 17 Feb 2015 13:33:46 +0300 [thread overview]
Message-ID: <1424169226-30112-1-git-send-email-al.drozdov@gmail.com> (raw)
skb_copy_bits() returns zero on success and negative value on error,
so it is needed to invert the condition in ip_check_defrag().
Fixes: 1bf3751ec90c ("ipv4: ip_check_defrag must not modify skb before unsharing")
Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com>
---
net/ipv4/ip_fragment.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index e5b6d0d..2c8d98e 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -664,7 +664,7 @@ struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
if (skb->protocol != htons(ETH_P_IP))
return skb;
- if (!skb_copy_bits(skb, 0, &iph, sizeof(iph)))
+ if (skb_copy_bits(skb, 0, &iph, sizeof(iph)) < 0)
return skb;
if (iph.ihl < 5 || iph.version != 4)
--
1.9.1
next reply other threads:[~2015-02-17 10:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-17 10:33 Alexander Drozdov [this message]
2015-02-17 13:33 ` [PATCH] ipv4: ip_check_defrag should correctly check return value of skb_copy_bits Denis Kirjanov
2015-02-17 15:55 ` Eric Dumazet
2015-02-20 20:23 ` David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1424169226-30112-1-git-send-email-al.drozdov@gmail.com \
--to=al.drozdov@gmail.com \
--cc=davem@davemloft.net \
--cc=jmorris@namei.org \
--cc=kaber@trash.net \
--cc=kuznet@ms2.inr.ac.ru \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=yoshfuji@linux-ipv6.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox