lguest: fix occasional crash in example launcher.

commit ca16f580a5db7e60bfafe59a50bb133bd3347491 upstream.

We usually got away with ->next on the final entry being NULL, but it
finally bit me.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/Documentation/virtual/lguest/lguest.c b/Documentation/virtual/lguest/lguest.c
index c095d79cae73d1acf8d2ae9991661be35be008bd..288dba6e1037cc39dce44d67e67b850179f50fda 100644 (file)
--- a/Documentation/virtual/lguest/lguest.c
+++ b/Documentation/virtual/lguest/lguest.c
@@ -1299,6 +1299,7 @@ static struct device *new_device(const char *name, u16 type)
        dev->feature_len = 0;
        dev->num_vq = 0;
        dev->running = false;
+       dev->next = NULL;
 
        /*
         * Append to device list.  Prepending to a single-linked list is