Commit 098416c4 authored Jan 11, 2023 by Volker Lendecke Committed by Greg Kroah-Hartman Jan 18, 2023

cifs: Fix uninitialized memory read for smb311 posix symlink create



commit a152d05ae4a71d802d50cf9177dba34e8bb09f68 upstream.

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.

Fixes: ce558b0e ("smb3: Add posix create context for smb3.11 posix mounts")
Cc: stable@vger.kernel.org
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Tom Talpey <tom@talpey.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent d6546426

fs/cifs/link.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -481,6 +481,7 @@ 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);