blockdev: filter out invalid block devices early

diff --git a/src/basic/blockdev-util.c b/src/basic/blockdev-util.c
index 5e7dc06c9973fe37769730c4a2854d98591ec6d2..6bbb723dfe915ce489a1a418feb6bd479c2ca3fb 100644 (file)
--- a/src/basic/blockdev-util.c
+++ b/src/basic/blockdev-util.c
@@ -21,6 +21,9 @@ int block_get_whole_disk(dev_t d, dev_t *ret) {
 
         assert(ret);
 
+        if (major(d) == 0)
+                return -ENODEV;
+
         /* If it has a queue this is good enough for us */
         xsprintf_sys_block_path(p, "/queue", d);
         if (access(p, F_OK) >= 0) {