[PATCH] ipv6: Fix ipv6_getsockopt for IPV6_2292PKTOPTIONS

[PATCH] ipv6: Fix ipv6_getsockopt for IPV6_2292PKTOPTIONS

[Daniel Baluta]

IPV6_2292PKTOPTIONS is broken for 32-bit applications running
in COMPAT mode on 64-bit kernels.

The same problem was fixed for IPv4 with the patch:
ipv4: Fix ip_getsockopt for IP_PKTOPTIONS,
commit dd23198e58cd35259dd09e8892bbdb90f1d57748

Signed-off-by: Sorin Dumitru <sdumitru@ixiacom.com>
Signed-off-by: Daniel Baluta <dbaluta@ixiacom.com>
---
 net/ipv6/ipv6_sockglue.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 9cb191e..71ce053 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -913,7 +913,7 @@ static int ipv6_getsockopt_sticky(struct sock *sk, struct ipv6_txoptions *opt,
 }
 
 static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, int __user *optlen)
+		    char __user *optval, int __user *optlen, unsigned flags)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	int len;
@@ -962,7 +962,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 
 		msg.msg_control = optval;
 		msg.msg_controllen = len;
-		msg.msg_flags = 0;
+		msg.msg_flags = flags;
 
 		lock_sock(sk);
 		skb = np->pktoptions;
@@ -1222,7 +1222,7 @@ int ipv6_getsockopt(struct sock *sk, int level, int optname,
 	if(level != SOL_IPV6)
 		return -ENOPROTOOPT;
 
-	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
+	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 0);
 #ifdef CONFIG_NETFILTER
 	/* we need to exclude all possible ENOPROTOOPTs except default case */
 	if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
@@ -1264,7 +1264,8 @@ int compat_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		return compat_mc_getsockopt(sk, level, optname, optval, optlen,
 			ipv6_getsockopt);
 
-	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
+	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 
+				 MSG_CMSG_COMPAT);
 #ifdef CONFIG_NETFILTER
 	/* we need to exclude all possible ENOPROTOOPTs except default case */
 	if (err == -ENOPROTOOPT && optname != IPV6_2292PKTOPTIONS) {
-- 
1.7.1

Re: [PATCH] ipv6: Fix ipv6_getsockopt for IPV6_2292PKTOPTIONS

[David Miller]

From: Daniel Baluta <dbaluta@ixiacom.com>
Date: Fri, 19 Aug 2011 12:55:58 +0300

> IPV6_2292PKTOPTIONS is broken for 32-bit applications running
> in COMPAT mode on 64-bit kernels.
> 
> The same problem was fixed for IPv4 with the patch:
> ipv4: Fix ip_getsockopt for IP_PKTOPTIONS,
> commit dd23198e58cd35259dd09e8892bbdb90f1d57748
> 
> Signed-off-by: Sorin Dumitru <sdumitru@ixiacom.com>
> Signed-off-by: Daniel Baluta <dbaluta@ixiacom.com>

Applied, but:

> -	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
> +	err = do_ipv6_getsockopt(sk, level, optname, optval, optlen, 

This adds trailing whitespace, which GIT catches and warns about,
please be mindful of this in the future.

I took care of it and fixed it up this time.

Re: [PATCH] ipv6: Fix ipv6_getsockopt for IPV6_2292PKTOPTIONS

[Daniel Baluta]

On Fri, Aug 19, 2011 at 1:19 PM, David Miller <davem@davemloft.net> wrote:
> From: Daniel Baluta <dbaluta@ixiacom.com>
> Date: Fri, 19 Aug 2011 12:55:58 +0300
>
>> IPV6_2292PKTOPTIONS is broken for 32-bit applications running
>> in COMPAT mode on 64-bit kernels.
>>
>> The same problem was fixed for IPv4 with the patch:
>> ipv4: Fix ip_getsockopt for IP_PKTOPTIONS,
>> commit dd23198e58cd35259dd09e8892bbdb90f1d57748
>>
>> Signed-off-by: Sorin Dumitru <sdumitru@ixiacom.com>
>> Signed-off-by: Daniel Baluta <dbaluta@ixiacom.com>
>
> Applied, but:
>
>> -     err = do_ipv6_getsockopt(sk, level, optname, optval, optlen);
>> +     err = do_ipv6_getsockopt(sk, level, optname, optval, optlen,
>
> This adds trailing whitespace, which GIT catches and warns about,
> please be mindful of this in the future.
>
> I took care of it and fixed it up this time.

Thanks David. I will pay more attention to this next time.

Daniel.