diff options
| author | Olaf Hering <olaf@aepfle.de> | 2012-05-31 16:40:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-10 00:29:46 +0900 |
| commit | bcc2c9c3fff859e0eb019fe6fec26f9b8eba795c (patch) | |
| tree | 7526735de80c573a3319a0f8d0fa6972aad48a59 /tools | |
| parent | cfaf025112d3856637ff34a767ef785ef5cf2ca9 (diff) | |
| download | lwn-bcc2c9c3fff859e0eb019fe6fec26f9b8eba795c.tar.gz lwn-bcc2c9c3fff859e0eb019fe6fec26f9b8eba795c.zip | |
Tools: hv: verify origin of netlink connector message
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@aepfle.de>
Signed-off-by: Marcus Meissner <meissner@suse.de>
Signed-off-by: Sebastian Krahmer <krahmer@suse.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/hv/hv_kvp_daemon.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c index 146fd6147e84..d9834b362943 100644 --- a/tools/hv/hv_kvp_daemon.c +++ b/tools/hv/hv_kvp_daemon.c @@ -701,14 +701,18 @@ 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; } |