block: Fix serial number assignment
We should use 'dinfo->serial' length, 'serial' is a pointer, so
the serial number length is currently limited to the pointer size.
This fixes https://bugs.launchpad.net/qemu/+bug/584143 and is also
valid for stable.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/blockdev.c b/blockdev.c
index bd9783a..642ce75 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -422,7 +422,7 @@
dinfo->on_write_error = on_write_error;
dinfo->opts = opts;
if (serial)
- strncpy(dinfo->serial, serial, sizeof(serial));
+ strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
QTAILQ_INSERT_TAIL(&drives, dinfo, next);
switch(type) {