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| author | Olaf Hering <olaf@aepfle.de> | 2013-04-24 07:48:49 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-24 09:02:35 -0700 |
| commit | 5edf5ee42a4dfbc500e9b9531335305d4c81a129 (patch) | |
| tree | dca40e1504b4ac1e788d53673182d65aea6a1f5e | |
| parent | eb8905b8ff4a887901779504d2ede95dc072bb16 (diff) | |
| download | linux-5edf5ee42a4dfbc500e9b9531335305d4c81a129.tar.bz2 | |
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 <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | tools/hv/hv_vss_daemon.c | 8 |
1 files changed, 7 insertions, 1 deletions
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) |