From: Alan Cox <alan@linux.intel.com>
Date: Wed, 21 Feb 2018 20:40:49 +0000 (+0000)
Subject: link: don't allow superuser to link to directories
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=1f428df51dbc95474f6435be9fc3f5823368c428;p=FUZIX.git

link: don't allow superuser to link to directories
---

diff --git a/Kernel/syscall_fs3.c b/Kernel/syscall_fs3.c
index c7c81417..b8404964 100644
--- a/Kernel/syscall_fs3.c
+++ b/Kernel/syscall_fs3.c
@@ -178,8 +178,10 @@ arg_t _link(void)
 	if (!(ino = n_open(name1, NULLINOPTR)))
 		return (-1);
 
-	if (getmode(ino) == MODE_R(F_DIR))
+	if (getmode(ino) == MODE_R(F_DIR)) {
+		udata.u_error = EISDIR;
 		goto nogood;
+	}
 
 	if (ino->c_node.i_nlink == 0xFFFF) {
 		udata.u_error = EMLINK;