From e0e3b6d92b37ba6633a9cd7f0ed2bd3ce56fdcc0 Mon Sep 17 00:00:00 2001 From: Tobias Brunner Date: Thu, 16 Jul 2015 11:43:44 +0200 Subject: [PATCH] kernel-netlink: Actually verify if the netlink message exceeds the buffer size It might equal it and that's fine. With MSG_TRUNC we get the actual message size and can only report an error if we haven't received the complete message. --- src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c b/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c index b0e3103..809d0f4 100644 --- a/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c +++ b/src/libhydra/plugins/kernel_netlink/kernel_netlink_shared.c @@ -185,8 +185,8 @@ static ssize_t read_msg(private_netlink_socket_t *this, return -1; } } - len = recv(this->socket, buf, buflen, block ? 0 : MSG_DONTWAIT); - if (len == buflen) + len = recv(this->socket, buf, buflen, (block ? 0 : MSG_DONTWAIT)|MSG_TRUNC); + if (len > buflen) { DBG1(DBG_KNL, "netlink response exceeds buffer size"); return 0; -- 2.4.5