linux-kernel - [PATCH 3.16 05/99] dlm: fixed memory leaks after failed ls_remove

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Date:   Tue, 02 Apr 2019 14:38:27 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "David Teigland" <teigland@...hat.com>,
        "Vasily Averin" <vvs@...tuozzo.com>
Subject: [PATCH 3.16 05/99] dlm: fixed memory leaks after failed
 ls_remove_names allocation

3.16.65-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Vasily Averin <vvs@...tuozzo.com>

commit b982896cdb6e6a6b89d86dfb39df489d9df51e14 upstream.

If allocation fails on last elements of array need to free already
allocated elements.

v2: just move existing out_rsbtbl label to right place

Fixes 789924ba635f ("dlm: fix race between remove and lookup")

Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
Signed-off-by: David Teigland <teigland@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 fs/dlm/lockspace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -673,11 +673,11 @@ static int new_lockspace(const char *nam
 	kfree(ls->ls_recover_buf);
  out_lkbidr:
 	idr_destroy(&ls->ls_lkbidr);
+ out_rsbtbl:
 	for (i = 0; i < DLM_REMOVE_NAMES_MAX; i++) {
 		if (ls->ls_remove_names[i])
 			kfree(ls->ls_remove_names[i]);
 	}
- out_rsbtbl:
 	vfree(ls->ls_rsbtbl);
  out_lsfree:
 	if (do_unreg)