From: Michał Januszewski <spock@gentoo.org>
Date: Fri, 25 Feb 2011 21:24:46 +0000 (+0100)
Subject: Verify that netlink messages are coming from kernel.
X-Git-Tag: v86d-0.1.10~1
X-Git-Url: https://repo.or.cz/w/v86d.git/commitdiff_plain/f9abfd412639286c3143e93e8ba2c9598dfba640?hp=982d5ea17847d1e27bb650d9a3205a368b197131

Verify that netlink messages are coming from kernel.

Thanks to Nelson Elhage for reporting this problem.
---

diff --git a/v86.c b/v86.c
index 5e4e69b..e065d84 100644
--- a/v86.c
+++ b/v86.c
@@ -129,6 +129,11 @@ int main(int argc, char *argv[])
 
 		reply = (struct nlmsghdr *)buf;
 
+		/* Ignore requests coming from outside the kernel. */
+		if (reply->nlmsg_pid != 0) {
+			continue;
+		}
+
 		switch (reply->nlmsg_type) {
 		case NLMSG_ERROR:
 			ulog(LOG_ERR, "Error message received.\n");