From e3782beb9f112e4f4f3b41cf809f639e852932f5 Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers3@gmail.com>
Date: Wed, 17 Feb 2016 20:21:39 -0600
Subject: [PATCH] win32_capture: handle NtQuerySecurityObject returning an
 empty descriptor

---
 src/win32_capture.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/win32_capture.c b/src/win32_capture.c
index 951f61bf..4bc0f7c2 100644
--- a/src/win32_capture.c
+++ b/src/win32_capture.c
@@ -634,8 +634,13 @@ winnt_load_security_descriptor(HANDLE h, struct wim_inode *inode,
 		}
 	}
 
+	/* We can get a length of 0 with Samba.  Assume that means "no security
+	 * descriptor".  */
+	if (len_needed == 0)
+		goto out;
+
 	/* Add the security descriptor to the WIM image, and save its ID in
-	 * file's inode.  */
+	 * the file's inode.  */
 	inode->i_security_id = sd_set_add_sd(ctx->params->sd_set, buf, len_needed);
 	if (unlikely(inode->i_security_id < 0))
 		status = STATUS_NO_MEMORY;
-- 
2.43.0