From 13a7ba1c2c5572391094800472f4a78899b4b843 Mon Sep 17 00:00:00 2001
From: Tim Chase <tim@chase2k.com>
Date: Mon, 24 Feb 2014 13:42:36 -0600
Subject: [PATCH] Fix zap_lookup() in feature_is_supported().

The length (number of integers) argument passed to zap_lookup was wrong;
likely as a result of performing stack-reduction on the function.

Signed-off-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2141
---
 module/zfs/zfeature.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/module/zfs/zfeature.c b/module/zfs/zfeature.c
index ccd7cb92e..4f4785a0c 100644
--- a/module/zfs/zfeature.c
+++ b/module/zfs/zfeature.c
@@ -204,7 +204,7 @@ feature_is_supported(objset_t *os, uint64_t obj, uint64_t desc_obj,
 				char *desc = "";
 
 				if (zap_lookup(os, desc_obj, za->za_name,
-				    1, sizeof (buf), buf) == 0)
+				    1, MAXPATHLEN, buf) == 0)
 					desc = buf;
 
 				VERIFY(nvlist_add_string(unsup_feat,