[rtems-libbsd commit] DEVICE(9): Avoid NULL pointer access

[Sebastian Huber]

Module:    rtems-libbsd
Branch:    master
Commit:    a8e84c62aea17714ce95f49065243af1965f7f07
Changeset: http://git.rtems.org/rtems-libbsd/commit/?id=a8e84c62aea17714ce95f49065243af1965f7f07

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Tue Feb 14 11:48:46 2017 +0100

DEVICE(9): Avoid NULL pointer access

---

 freebsd/sys/kern/subr_bus.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/freebsd/sys/kern/subr_bus.c b/freebsd/sys/kern/subr_bus.c
index e554366..fdc47ab 100644
--- a/freebsd/sys/kern/subr_bus.c
+++ b/freebsd/sys/kern/subr_bus.c
@@ -272,6 +272,9 @@ device_sysctl_handler(SYSCTL_HANDLER_ARGS)
 		break;
 	case DEVICE_SYSCTL_PARENT:
 		value = dev->parent ? dev->parent->nameunit : "";
+#ifdef __rtems__
+		value = value ? value : "";
+#endif /* __rtems__ */
 		break;
 	default:
 		return (EINVAL);