From f57d5da27792f79e9e42c9b0ca8626455a5dc94d Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 14 Oct 2009 15:26:40 +0000
Subject: * ext/socket/init.c (rsock_init_sock): validate file descriptor.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@25336 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/socket/init.c | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'ext/socket')

diff --git a/ext/socket/init.c b/ext/socket/init.c
index ed85e0b50..85cc3de4f 100644
--- a/ext/socket/init.c
+++ b/ext/socket/init.c
@@ -43,6 +43,12 @@ VALUE
 rsock_init_sock(VALUE sock, int fd)
 {
     rb_io_t *fp;
+    struct stat sbuf;
+
+    if (fstat(fd, &sbuf) < 0)
+        rb_sys_fail(0);
+    if (!S_ISSOCK(sbuf.st_mode))
+        rb_raise(rb_eArgError, "not a socket file descriptor");
 
     MakeOpenFile(sock, fp);
     fp->fd = fd;
-- 
cgit