This is a note to let you know that I've just added the patch titled
Tools: hv: verify origin of netlink connector message
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tools-hv-verify-origin-of-netlink-connector-message.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bcc2c9c3fff859e0eb019fe6fec26f9b8eba795c Mon Sep 17 00:00:00 2001
From: Olaf Hering <olaf@xxxxxxxxx>
Date: Thu, 31 May 2012 16:40:06 +0200
Subject: Tools: hv: verify origin of netlink connector message
From: Olaf Hering <olaf@xxxxxxxxx>
commit bcc2c9c3fff859e0eb019fe6fec26f9b8eba795c upstream.
The SuSE security team suggested to use recvfrom instead of recv to be
certain that the connector message is originated from kernel.
CVE-2012-2669
Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
Signed-off-by: Marcus Meissner <meissner@xxxxxxx>
Signed-off-by: Sebastian Krahmer <krahmer@xxxxxxx>
Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
drivers/staging/hv/tools/hv_kvp_daemon.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
--- a/drivers/staging/hv/tools/hv_kvp_daemon.c
+++ b/drivers/staging/hv/tools/hv_kvp_daemon.c
@@ -378,14 +378,18 @@ int main(void)
pfd.fd = fd;
while (1) {
+ struct sockaddr *addr_p = (struct sockaddr *) &addr;
+ socklen_t addr_l = sizeof(addr);
pfd.events = POLLIN;
pfd.revents = 0;
poll(&pfd, 1, -1);
- len = recv(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0);
+ len = recvfrom(fd, kvp_recv_buffer, sizeof(kvp_recv_buffer), 0,
+ addr_p, &addr_l);
- if (len < 0) {
- syslog(LOG_ERR, "recv failed; error:%d", len);
+ if (len < 0 || addr.nl_pid) {
+ syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s",
+ addr.nl_pid, errno, strerror(errno));
close(fd);
return -1;
}
Patches currently in stable-queue which might be from olaf@xxxxxxxxx are
queue-3.0/tools-hv-verify-origin-of-netlink-connector-message.patch
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