bdev_copy segfaults if bdevtype is NULL

Signed-off-by: S.Çağlar Onur <caglar@10ur.org> Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>

bdev_copy segfaults if bdevtype is NULL
e34b5d2e · S.Çağlar Onur · Serge Hallyn · cd0bcc49 · e34b5d2e
Commit e34b5d2e authored Sep 03, 2013 by S.Çağlar Onur Committed by Serge Hallyn Sep 04, 2013
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bdev.c src/lxc/bdev.c +1 -1

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--- a/src/lxc/bdev.c
+++ b/src/lxc/bdev.c
@@ -1939,7 +1939,7 @@ struct bdev *bdev_copy(const char *src, const char *oldname, const char *cname,
 		bdevtype = "overlayfs";
 	*needs_rdep = 0;
-	if (strcmp(orig->type, "dir") == 0 &&
+	if (bdevtype && strcmp(orig->type, "dir") == 0 &&
 			strcmp(bdevtype, "overlayfs") == 0)
 		*needs_rdep = 1;