From cf06f991f927503cfca05846eb7f19a2925df03d Mon Sep 17 00:00:00 2001
From: bagajjal <bagajjal@microsoft.com>
Date: Fri, 15 Apr 2022 13:49:41 -0700
Subject: [PATCH] CHROOT - fix symbolic link that refers to a network share
 (#596)

---
 contrib/win32/openssh/OpenSSH-build.ps1 | 3 +--
 contrib/win32/win32compat/fileio.c      | 8 ++++++++
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/contrib/win32/openssh/OpenSSH-build.ps1 b/contrib/win32/openssh/OpenSSH-build.ps1
index 7601ce25c..2cfeff5cf 100644
--- a/contrib/win32/openssh/OpenSSH-build.ps1
+++ b/contrib/win32/openssh/OpenSSH-build.ps1
@@ -46,5 +46,4 @@ try
 finally
 {
     Pop-Location
-}
-
+}
\ No newline at end of file
diff --git a/contrib/win32/win32compat/fileio.c b/contrib/win32/win32compat/fileio.c
index 11d658d11..b99773232 100644
--- a/contrib/win32/win32compat/fileio.c
+++ b/contrib/win32/win32compat/fileio.c
@@ -427,6 +427,14 @@ file_in_chroot_jail(HANDLE handle) {
 	if (!final_path)
 		return 0;
 
+	const wchar_t* uncPrefix = L"UNC\\";
+	int isUNCPath = memcmp(final_path, uncPrefix, 2 * wcslen(uncPrefix));
+
+	if (0 == isUNCPath) {
+		debug3("symlink points to UNCPath");
+		return 1;
+	}
+
 	to_wlower_case(final_path);
 	if ((wcslen(final_path) < wcslen(chroot_pathw)) ||
 	    memcmp(final_path, chroot_pathw, 2 * wcslen(chroot_pathw)) != 0 ||