From 25a50ca0d5d3ea076c63c23692e4cb9868bfb55d Mon Sep 17 00:00:00 2001 From: KIU Shueng Chuan Date: Tue, 8 Sep 2015 17:26:31 +0800 Subject: [PATCH] avoid dereferencing uint32_t on unaligned address --- src/socket_base.cpp | 21 +++++---------------- 1 file changed, 5 insertions(+), 16 deletions(-) diff --git a/src/socket_base.cpp b/src/socket_base.cpp index a980015fc..ea178a868 100644 --- a/src/socket_base.cpp +++ b/src/socket_base.cpp @@ -1361,8 +1361,11 @@ void zmq::socket_base_t::monitor_event (int event_, int value_, const std::strin zmq_msg_t msg; zmq_msg_init_size (&msg, 6); uint8_t *data = (uint8_t *) zmq_msg_data (&msg); - *(uint16_t *) (data + 0) = (uint16_t) event_; - *(uint32_t *) (data + 2) = (uint32_t) value_; + // Avoid dereferencing uint32_t on unaligned address + uint16_t event = (uint16_t) event_; + uint32_t value = (uint32_t) value_; + memcpy (data + 0, &event, sizeof(event)); + memcpy (data + 2, &value, sizeof(value)); zmq_sendmsg (monitor_socket, &msg, ZMQ_SNDMORE); // Send address in second frame