From 94183331e815617246b1baa97e0916f358c794bb Mon Sep 17 00:00:00 2001
From: Shu Wang <shuwang@redhat.com>
Date: Thu, 7 Sep 2017 16:03:27 +0800
Subject: [PATCH] cifs: release cifs root_cred after exit_cifs
Git-commit: 94183331e815617246b1baa97e0916f358c794bb
Patch-mainline: v4.14-rc2
References: bsc#1085536, bsc#1144333

memory leak was found by kmemleak. exit_cifs_spnego
should be called before cifs module removed, or
cifs root_cred will not be released.

kmemleak report:
unreferenced object 0xffff880070a3ce40 (size 192):
  backtrace:
     kmemleak_alloc+0x4a/0xa0
     kmem_cache_alloc+0xc7/0x1d0
     prepare_kernel_cred+0x20/0x120
     init_cifs_spnego+0x2d/0x170 [cifs]
     0xffffffffc07801f3
     do_one_initcall+0x51/0x1b0
     do_init_module+0x60/0x1fd
     load_module+0x161e/0x1b60
     SYSC_finit_module+0xa9/0x100
     SyS_finit_module+0xe/0x10

Signed-off-by: Shu Wang <shuwang@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Cc: Stable <stable@vger.kernel.org>
Acked-by: Aurelien Aptel <aaptel@suse.com>

---
 fs/cifs/cifsfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index a864e6575309..8c8b75d33f31 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -1449,7 +1449,7 @@ exit_cifs(void)
 	exit_cifs_idmap();
 #endif
 #ifdef CONFIG_CIFS_UPCALL
-	unregister_key_type(&cifs_spnego_key_type);
+	exit_cifs_spnego();
 #endif
 	cifs_destroy_request_bufs();
 	cifs_destroy_mids();
-- 
2.16.4