X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev%2Flib%2Flibudev-device.c;h=b5d42354e548d31c33f4304f6e35ef6049d362dd;hb=babcf3cb22af24725030ad795f2e41d024afced3;hp=65ba6e30d83ef736389d413578e6877473a5e9bb;hpb=aa8734ffcb8a895fc8d66ff383cbcf8f4b78f562;p=elogind.git

diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index 65ba6e30d..b5d42354e 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -936,8 +936,13 @@ int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath
 	}
 
 	/* trailing number */
-	while (isdigit(udev_device->sysname[--len]))
+	while (len > 0 && isdigit(udev_device->sysname[--len]))
 		udev_device->sysnum = &udev_device->sysname[len];
+
+	/* sysname is completely numeric */
+	if (len == 0)
+		udev_device->sysnum = NULL;
+
 	return 0;
 }