From: David S. Miller <davem@davemloft.net>
Date: Wed, 13 Jan 2016 15:28:06 +0000 (-0500)
Subject: genetlink: Fix off-by-one in genl_allocate_reserve_groups()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b8e429a2feac623a34e21099a4a69de29b6d873e;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

genetlink: Fix off-by-one in genl_allocate_reserve_groups()

The bug fix for adding n_groups to the computation forgot
to adjust ">=" to ">" to keep the condition correct.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index d3f6b063467b..f830326b3b1d 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -185,7 +185,7 @@ static int genl_allocate_reserve_groups(int n_groups, int *first_id)
 			}
 		}
 
-		if (id + n_groups >= mc_groups_longs * BITS_PER_LONG) {
+		if (id + n_groups > mc_groups_longs * BITS_PER_LONG) {
 			unsigned long new_longs = mc_groups_longs +
 						  BITS_TO_LONGS(n_groups);
 			size_t nlen = new_longs * sizeof(unsigned long);