[dm-devel] [PATCH v2] mdopen: Prevent overrunning the devname buffer when copying devnm into it for long md names.

[Robert LeBlanc]

Linux allows for 32 character device names. When using the maximum size device name and also
storing "/dev/", devname needs to be 37 character long to store the complete device name.
i.e. "/dev/md_abcdefghijklmnopqrstuvwxyz12\0"

Signed-Off: Robert LeBlanc<robert at leblancnet.us>
---
 mdopen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mdopen.c b/mdopen.c
index f818fdf..5af344b 100644
--- a/mdopen.c
+++ b/mdopen.c
@@ -144,7 +144,7 @@ int create_mddev(char *dev, char *name, int autof, int trustworthy,
 	struct createinfo *ci = conf_get_create_info();
 	int parts;
 	char *cname;
-	char devname[20];
+	char devname[37];
 	char devnm[32];
 	char cbuf[400];
 	if (chosen == NULL)
-- 
2.9.3