[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 6 Jun 2011 18:00:07 +0200
From: Marcus Meissner <meissner@...e.de>
To: Reinhard Max <max@...e.de>, David Miller <davem@...emloft.net>,
netdev@...r.kernel.org
Subject: [PATCH] net/ipv6: check for mistakenly passed in non-AF_INET6 sockaddrs
On Mon, Jun 06, 2011 at 03:47:30PM +0200, Reinhard Max wrote:
>
> On Wed, 1 Jun 2011 at 21:03, David Miller wrote:
>
> >Since we haven't been validating the sin_family field for 18+ years,
> >the chance to break some applications is very real.
> >
> >But I think it's more important to fix this (and force any broken
> >apps to set sin_family correctly). So I will apply this, thanks.
>
> I think a corresponding check should also go into inet6_bind() in
> net/ipv6/af_inet6.c .
Good idea,
Same check as for IPv4, also do for IPv6.
(If you passed in a IPv4 sockaddr_in here, the sizeof check
in the line before would have triggered already though.)
Signed-off-by: Marcus Meissner <meissner@...e.de>
Cc: Reinhard Max <max@...e.de>
Ciao, Marcus
---
net/ipv6/af_inet6.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index b7919f9..d450a2f 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -272,6 +272,10 @@ int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
+
+ if (addr->sin6_family != AF_INET6)
+ return -EINVAL;
+
addr_type = ipv6_addr_type(&addr->sin6_addr);
if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
return -EINVAL;
--
1.7.4.1
--
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
Powered by blists - more mailing lists