diff options
| author | Cong Wang <xiyou.wangcong@gmail.com> | 2013-01-07 21:17:00 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-14 10:48:54 -0800 |
| commit | 0ad715758022062a34bccede6200803e26480c97 (patch) | |
| tree | 60a4afb6dd1aa6842c41b886bcdaf4d9b96b4b2c | |
| parent | 7f8d73f9e71d58187f42d26088578be5d2d70859 (diff) | |
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>
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 59ef40abf500..374828487003 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -589,7 +589,7 @@ 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; |