From 509c7718dde14a9317457a1f36dc56537679596d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Duval?= <jerome.duval@gmail.com>
Date: Sat, 7 Apr 2018 17:51:10 +0200
Subject: [PATCH] fat: dosfs_read_attr used the user buffer directly

It now uses user_strlcpy().
---
 src/add-ons/kernel/file_systems/fat/attr.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/add-ons/kernel/file_systems/fat/attr.c b/src/add-ons/kernel/file_systems/fat/attr.c
index 6f0bf71e1d..3042278f05 100644
--- a/src/add-ons/kernel/file_systems/fat/attr.c
+++ b/src/add-ons/kernel/file_systems/fat/attr.c
@@ -233,8 +233,10 @@ dosfs_read_attr(fs_volume *_vol, fs_vnode *_node, void *_cookie, off_t pos,
 		return EINVAL;
 	}
 
-	strncpy(buffer, node->mime + pos, *_length - 1);
-	((char *)buffer)[*_length - 1] = 0;
+	if (user_strlcpy(buffer, node->mime + pos, *_length) < B_OK) {
+		UNLOCK_VOL(vol);
+		return B_BAD_ADDRESS;
+	}
 	*_length = strlen(buffer) + 1;
 
 	UNLOCK_VOL(vol);