net: prevent setting ttl=0 via IP_TTL
authorCong Wang <xiyou.wangcong@gmail.com>
Mon, 7 Jan 2013 21:17:00 +0000 (21:17 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 14 Feb 2013 18:48:54 +0000 (10:48 -0800)
commit0ad715758022062a34bccede6200803e26480c97
tree60a4afb6dd1aa6842c41b886bcdaf4d9b96b4b2c
parent7f8d73f9e71d58187f42d26088578be5d2d70859
net: prevent setting ttl=0 via IP_TTL

[ Upstream commit c9be4a5c49cf51cc70a993f004c5bb30067a65ce ]

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>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/ipv4/ip_sockglue.c