Fix posix 311 symlink creation mode

[Volker Lendecke <Volker.Lendecke@sernet.de>]

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Hi!

Attached find a patch that fixes an uninitialized memory read when
creating symlinks using the smb311 posix extensions.

Volker

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From 482fa85ef97505626b6b146155834e6bc36012fa Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@samba.org>
Date: Wed, 11 Jan 2023 12:37:58 +0100
Subject: [PATCH] cifs: Fix uninitialized memory read for smb311 posix symlink
 create

If smb311 posix is enabled, we send the intended mode for file
creation in the posix create context. Instead of using what's there on
the stack, create the mfsymlink file with 0644.

Signed-off-by: Volker Lendecke <vl@samba.org>
---
 fs/cifs/link.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index bd374feeccaa..a5a097a69983 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -428,6 +428,7 @@ smb3_create_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
 	oparms.disposition = FILE_CREATE;
 	oparms.fid = &fid;
 	oparms.reconnect = false;
+	oparms.mode = 0644;
 
 	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL,
 		       NULL, NULL);
-- 
2.30.2