From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Sat, 14 Sep 2019 20:02:33 +0000 (-0400)
Subject: sessiond: fix: possible unaligned access in packed structure
X-Git-Tag: v2.9.13~3
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=dee68e680fcb782b455daaeab744d5480580a3fd;p=lttng-tools.git

sessiond: fix: possible unaligned access in packed structure

'&rsock->sock.fd' is passed to consumer_send_fds and may result in an
unaligned pointer value. Use the ALIGNED_CONST_PTR macro to create
an aligned copy of the fd that is being passed.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/bin/lttng-sessiond/consumer.c b/src/bin/lttng-sessiond/consumer.c
index 960fe8e46..5f2c1e9b2 100644
--- a/src/bin/lttng-sessiond/consumer.c
+++ b/src/bin/lttng-sessiond/consumer.c
@@ -1047,7 +1047,7 @@ int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
 	}
 
 	DBG3("Sending relayd socket file descriptor to consumer");
-	ret = consumer_send_fds(consumer_sock, &rsock->sock.fd, 1);
+	ret = consumer_send_fds(consumer_sock, ALIGNED_CONST_PTR(rsock->sock.fd), 1);
 	if (ret < 0) {
 		goto error;
 	}