From 5edf5ee42a4dfbc500e9b9531335305d4c81a129 Mon Sep 17 00:00:00 2001 From: Olaf Hering Date: Wed, 24 Apr 2013 07:48:49 -0700 Subject: [PATCH] tools: hv: fix checks for origin of netlink message in hv_vss_daemon Similar to what commit 95a69adab9acfc3981c504737a2b6578e4d846ef ("tools: hv: Netlink source address validation allows DoS") does in hv_kvp_daemon, improve checks for origin of netlink connector message. Signed-off-by: Olaf Hering Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- tools/hv/hv_vss_daemon.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c index 2a03d0b4e213..dc3eb1e44c8a 100644 --- a/tools/hv/hv_vss_daemon.c +++ b/tools/hv/hv_vss_daemon.c @@ -186,13 +186,19 @@ int main(void) len = recvfrom(fd, vss_recv_buffer, sizeof(vss_recv_buffer), 0, addr_p, &addr_l); - if (len < 0 || addr.nl_pid) { + if (len < 0) { syslog(LOG_ERR, "recvfrom failed; pid:%u error:%d %s", addr.nl_pid, errno, strerror(errno)); close(fd); return -1; } + if (addr.nl_pid) { + syslog(LOG_WARNING, "Received packet from untrusted pid:%u", + addr.nl_pid); + continue; + } + incoming_msg = (struct nlmsghdr *)vss_recv_buffer; if (incoming_msg->nlmsg_type != NLMSG_DONE) -- 2.20.1