From f9e19c093165d7c75bd9d04204845ed53b8ff0a8 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Wed, 25 Feb 2004 10:54:31 +0000
Subject: 	* miscfuncs.cc (check_invalid_virtual_addr): New function. 
 * winsup.h (check_invalid_virtual_addr): Declare. 	* mmap.cc (munmap):
 Call check_invalid_virtual_addr instead of 	IsBadReadPtr.

---
 winsup/cygwin/miscfuncs.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'winsup/cygwin/miscfuncs.cc')

diff --git a/winsup/cygwin/miscfuncs.cc b/winsup/cygwin/miscfuncs.cc
index 4207c4d1a..7947365f4 100644
--- a/winsup/cygwin/miscfuncs.cc
+++ b/winsup/cygwin/miscfuncs.cc
@@ -214,6 +214,18 @@ __check_invalid_read_ptr_errno (const void *s, unsigned sz)
   return set_errno (EFAULT);
 }
 
+int __stdcall
+check_invalid_virtual_addr (const void *s, unsigned sz)
+{
+  MEMORY_BASIC_INFORMATION mbuf;
+  void *end;
+
+  for (end = (char *) s + sz; s < end; s = (char *) s + mbuf.RegionSize)
+    if (!VirtualQuery (s, &mbuf, sizeof mbuf))
+      return EINVAL;
+  return 0;
+}
+
 ssize_t
 check_iovec_for_read (const struct iovec *iov, int iovcnt)
 {
-- 
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