[PATCH 4.19 114/148] dlm: fixed memory leaks after failed ls_remove_names allocation

From: Greg Kroah-Hartman
Date: Fri Jan 11 2019 - 09:39:49 EST


4.19-stable review patch. If anyone has any objections, please let me know.

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

From: Vasily Averin <vvs@xxxxxxxxxxxxx>

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")
Cc: stable@xxxxxxxxxx # 3.6

Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
Signed-off-by: David Teigland <teigland@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -680,11 +680,11 @@ 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)