netdev - [PATCH] deal with if frags[0].size is pulled to 0 in dev_gro

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1280805439-18988-1-git-send-email-xiaohui.xin@intel.com>
Date:	Tue,  3 Aug 2010 11:17:19 +0800
From:	xiaohui.xin@...el.com
To:	netdev@...r.kernel.org, herbert@...dor.apana.org.au,
	davem@...emloft.net
Cc:	Xin Xiaohui <xiaohui.xin@...el.com>
Subject: [PATCH] deal with if frags[0].size is pulled to 0 in dev_gro_receive()

From: Xin Xiaohui <xiaohui.xin@...el.com>

Now in dev_gro_receive(), if frags[0].size is pulled to 0, memmove is called and
the null page is released. But it's not enough, we should reset size of each frags
left as well. Compared to this, we can have another way to do this, it's not do do
anything at all.

Signed-off-by: Xin Xiaohui <xiaohui.xin@...el.com>

---
 net/core/dev.c |    7 -------
 1 files changed, 0 insertions(+), 7 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 264137f..28cdbbf 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2730,13 +2730,6 @@ pull:
 
 		skb_shinfo(skb)->frags[0].page_offset += grow;
 		skb_shinfo(skb)->frags[0].size -= grow;
-
-		if (unlikely(!skb_shinfo(skb)->frags[0].size)) {
-			put_page(skb_shinfo(skb)->frags[0].page);
-			memmove(skb_shinfo(skb)->frags,
-				skb_shinfo(skb)->frags + 1,
-				--skb_shinfo(skb)->nr_frags);
-		}
 	}
 
 ok:
-- 
1.5.4.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html