From: Cong Wang <xiyou.wangcong@gmail.com>
To: netdev@vger.kernel.org
Cc: nitin padalia <padalia.nitin@gmail.com>,
Eric Dumazet <eric.dumazet@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Cong Wang <xiyou.wangcong@gmail.com>
Subject: [Patch] net: prevent setting ttl=0 via IP_TTL
Date: Tue, 8 Jan 2013 15:17:00 +0800 [thread overview]
Message-ID: <1357629420-29725-1-git-send-email-xiyou.wangcong@gmail.com> (raw)
From: Cong Wang <xiyou.wangcong@gmail.com>
A regression is introduced by the following commit:
commit 4d52cfbef6266092d535237ba5a4b981458ab171
Author: Eric Dumazet <eric.dumazet@gmail.com>
Date: Tue Jun 2 00:42:16 2009 -0700
net: ipv4/ip_sockglue.c cleanups
Pure cleanups
but it is not a pure cleanup...
- if (val != -1 && (val < 1 || val>255))
+ if (val != -1 && (val < 0 || val > 255))
Since there is no reason provided to allow ttl=0, change it back.
Reported-by: nitin padalia <padalia.nitin@gmail.com>
Cc: nitin padalia <padalia.nitin@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
---
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 3c9d208..d9c4f11 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -590,7 +590,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
case IP_TTL:
if (optlen < 1)
goto e_inval;
- if (val != -1 && (val < 0 || val > 255))
+ if (val != -1 && (val < 1 || val > 255))
goto e_inval;
inet->uc_ttl = val;
break;
next reply other threads:[~2013-01-08 7:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-08 7:17 Cong Wang [this message]
2013-01-08 15:07 ` [Patch] net: prevent setting ttl=0 via IP_TTL Eric Dumazet
2013-01-09 1:57 ` David Miller
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