From ecc4acd3f9533011f289718aebcedd16671117ca Mon Sep 17 00:00:00 2001
From: Alexander Motin <mav@FreeBSD.org>
Date: Tue, 26 Jan 2016 12:51:41 +0000
Subject: [PATCH] 6388 Failure of userland copy should return EFAULT

Reviewed by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Approved by: Robert Mustacchi <rm@joyent.com>
Author: Richard Yao <ryao@gentoo.org>

illumos/illumos-gate@c71c00bbe8a9cdc7e3f4048b751f48e80441d506
---
 uts/common/fs/zfs/zfs_ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/uts/common/fs/zfs/zfs_ioctl.c b/uts/common/fs/zfs/zfs_ioctl.c
index c863cbd399a8..933802fb496d 100644
--- a/uts/common/fs/zfs/zfs_ioctl.c
+++ b/uts/common/fs/zfs/zfs_ioctl.c
@@ -1303,7 +1303,7 @@ get_nvlist(uint64_t nvl, uint64_t size, int iflag, nvlist_t **nvp)
 	if ((error = ddi_copyin((void *)(uintptr_t)nvl, packed, size,
 	    iflag)) != 0) {
 		kmem_free(packed, size);
-		return (error);
+		return (SET_ERROR(EFAULT));
 	}
 
 	if ((error = nvlist_unpack(packed, size, &list, 0)) != 0) {