[Devel] [PATCH RHEL8 COMMIT] ploop: Fix off-by-one in ploop_ctr()

[Konstantin Khorenko]

The commit is pushed to "branch-rh8-4.18.0-240.1.1.vz8.5.x-ovz" and will appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh8-4.18.0-240.1.1.vz8.5.23
------>
commit 9cf205c7f3af5b95997b45e0f605fb8a8e15817e
Author: Kirill Tkhai <ktkhai at virtuozzo.com>
Date:   Fri Apr 30 12:11:05 2021 +0300

    ploop: Fix off-by-one in ploop_ctr()
    
    We dereference at least two arguments: cluster_log and origin_dev.
    
    Signed-off-by: Kirill Tkhai <ktkhai at virtuozzo.com>
---
 drivers/md/dm-ploop-target.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/dm-ploop-target.c b/drivers/md/dm-ploop-target.c
index 5ae0c624c8fb..7b5f81955abe 100644
--- a/drivers/md/dm-ploop-target.c
+++ b/drivers/md/dm-ploop-target.c
@@ -118,7 +118,7 @@ static int ploop_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 	struct ploop *ploop;
 	int i, ret;
 
-	if (argc < 1)
+	if (argc < 2)
 		return -EINVAL;
 
 	ploop = kzalloc(sizeof(*ploop), GFP_KERNEL);