[src/trunk]: src/sys/dev/dm dm: Fix memory leak in dm_pdev_rem()

[tkusumi <tkusumi%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/18094c7043e4
branches:  trunk
changeset: 847163:18094c7043e4
user:      tkusumi <tkusumi%NetBSD.org@localhost>
date:      Fri Dec 13 15:49:22 2019 +0000

description:
dm: Fix memory leak in dm_pdev_rem()

Need to free dmp regardless of dm_pdev_rem() return value.
taken-from: DragonFlyBSD

diffstat:

 sys/dev/dm/dm_pdev.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (30 lines):

diff -r 261ed328947c -r 18094c7043e4 sys/dev/dm/dm_pdev.c
--- a/sys/dev/dm/dm_pdev.c      Fri Dec 13 14:13:55 2019 +0000
+++ b/sys/dev/dm/dm_pdev.c      Fri Dec 13 15:49:22 2019 +0000
@@ -1,4 +1,4 @@
-/*        $NetBSD: dm_pdev.c,v 1.19 2019/12/08 12:14:40 mlelstv Exp $      */
+/*        $NetBSD: dm_pdev.c,v 1.20 2019/12/13 15:49:22 tkusumi Exp $      */
 
 /*
  * Copyright (c) 2008 The NetBSD Foundation, Inc.
@@ -29,7 +29,7 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: dm_pdev.c,v 1.19 2019/12/08 12:14:40 mlelstv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: dm_pdev.c,v 1.20 2019/12/13 15:49:22 tkusumi Exp $");
 
 #include <sys/types.h>
 #include <sys/param.h>
@@ -174,8 +174,10 @@
 
        if (dmp->pdev_vnode != NULL) {
                int error = vn_close(dmp->pdev_vnode, FREAD | FWRITE, FSCRED);
-               if (error != 0)
+               if (error != 0) {
+                       kmem_free(dmp, sizeof(*dmp));
                        return error;
+               }
        }
        kmem_free(dmp, sizeof(*dmp));