From: Volker Lendecke <vl@samba.org>
Date: Thu, 4 Sep 2025 14:48:07 +0000 (+0200)
Subject: vfs: Protect against an empty stream prefix
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b709da701080552b9a7f288c34f66ace219e0c04;p=thirdparty%2Fsamba.git

vfs: Protect against an empty stream prefix

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
---

diff --git a/source3/modules/vfs_streams_xattr.c b/source3/modules/vfs_streams_xattr.c
index dd5e6b8164d..7ea42220207 100644
--- a/source3/modules/vfs_streams_xattr.c
+++ b/source3/modules/vfs_streams_xattr.c
@@ -1107,6 +1107,12 @@ static int streams_xattr_connect(vfs_handle_struct *handle,
 	config->prefix_len = strlen(config->prefix);
 	DEBUG(10, ("streams_xattr using stream prefix: %s\n", config->prefix));
 
+	if (config->prefix_len == 0) {
+		DBG_WARNING("Empty prefix not valid\n");
+		errno = EINVAL;
+		return -1;
+	}
+
 	config->store_stream_type = lp_parm_bool(SNUM(handle->conn),
 						 "streams_xattr",
 						 "store_stream_type",