[PATCH 02/17] mkfs: sanitise ftype parameter values.

[Jan Ťulák]

From: Dave Chinner <dchinner at redhat.com>

Because passing "-n ftype=2" should fail.

Signed-off-by: Dave Chinner <dchinner at redhat.com>
Signed-off-by: Jan Ťulák <jtulak at redhat.com>
---
 mkfs/xfs_mkfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mkfs/xfs_mkfs.c b/mkfs/xfs_mkfs.c
index d0de90d..1652903 100644
--- a/mkfs/xfs_mkfs.c
+++ b/mkfs/xfs_mkfs.c
@@ -1617,12 +1617,15 @@ _("cannot specify both crc and ftype\n"));
 						reqval('n', nopts, N_FTYPE);
 					if (nftype)
 						respec('n', nopts, N_FTYPE);
-					dirftype = atoi(value);
+					c = atoi(value);
+					if (c < 0 || c > 1)
+						illegal(value, "n ftype");
 					if (crcs_enabled) {
 						fprintf(stderr,
 _("cannot specify both crc and ftype\n"));
 						usage();
 					}
+					dirftype = c;
 					nftype = 1;
 					break;
 				default:
-- 
2.1.0