Leave space for the terminating zero when reading and make sure
that the last byte is zero. This also makes the check for long packets
equivalent to code before 9c89c1ca: reject also packets with size 8192.
---
src/libudev/libudev-monitor.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/src/libudev/libudev-monitor.c b/src/libudev/libudev-monitor.c
index 4cfb2f6..b7fc031 100644
--- a/src/libudev/libudev-monitor.c
+++ b/src/libudev/libudev-monitor.c
@@ -590,7 +590,7 @@ retry:
if (udev_monitor == NULL)
return NULL;
iov.iov_base = &buf;
- iov.iov_len = sizeof(buf);
+ iov.iov_len = sizeof(buf) - 1; /* Leave space for terminating zero */
memzero(&smsg, sizeof(struct msghdr));
smsg.msg_iov = &iov;
smsg.msg_iovlen = 1;
@@ -642,6 +642,8 @@ retry:
if (udev_device == NULL)
return NULL;
+ buf.raw[sizeof(buf.raw) - 1] = '\0';
+
if (memcmp(buf.raw, "libudev", 8) == 0) {
/* udev message needs proper version magic */
if (buf.nlh.magic != htonl(UDEV_MONITOR_MAGIC)) {
--
2.1.4
_______________________________________________
systemd-devel mailing list
systemd-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/systemd-devel
