This allows the netlink processing context to determine if the data
needs any 32 bit fixups.
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
---
include/linux/netlink.h | 1 +
net/netlink/af_netlink.c | 3 +++
2 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/include/linux/netlink.h b/include/linux/netlink.h
index 6eaca5e..031e528 100644
--- a/include/linux/netlink.h
+++ b/include/linux/netlink.h
@@ -164,6 +164,7 @@ struct netlink_skb_parms {
__u32 loginuid; /* Login (audit) uid */
__u32 sessionid; /* Session id (audit) */
__u32 sid; /* SELinux security id */
+ bool msg_compat; /* Message needs 32bit fixups */
};
#define NETLINK_CB(skb) (*(struct netlink_skb_parms*)&((skb)->cb))
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index beaada0..47c8314 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1339,6 +1339,9 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock,
NETLINK_CB(skb).dst_group = dst_group;
NETLINK_CB(skb).loginuid = audit_get_loginuid(current);
NETLINK_CB(skb).sessionid = audit_get_sessionid(current);
+#ifdef CONFIG_COMPAT_NETLINK_MESSAGES
+ NETLINK_CB(skb).msg_compat = !!(msg->msg_flags & MSG_CMSG_COMPAT);
+#endif
security_task_getsecid(current, &(NETLINK_CB(skb).sid));
memcpy(NETLINK_CREDS(skb), &siocb->scm->creds, sizeof(struct ucred));
--
1.6.4.4
--
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