linux-kernel - [PATCH v2] dlm: fixed memory leaks after failed ls_remove

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Message-ID: <4214fe38-d4e9-60c9-4555-dd59f4528495@virtuozzo.com>
Date:   Thu, 15 Nov 2018 13:15:05 +0300
From:   Vasily Averin <vvs@...tuozzo.com>
To:     linux-kernel@...r.kernel.org,
        Christine Caulfield <ccaulfie@...hat.com>,
        David Teigland <teigland@...hat.com>, cluster-devel@...hat.com
Subject: [PATCH v2] dlm: fixed memory leaks after failed ls_remove_names
 allocation

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")
Cc: stable@...nel.org # 3.6

Signed-off-by: Vasily Averin <vvs@...tuozzo.com>
---
 fs/dlm/lockspace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 5ba94be006ee..6a1529e478f3 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -680,11 +680,11 @@ static int new_lockspace(const char *name, const char *cluster,
 	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)
-- 
2.17.1