netdev - [PATCH][net-next] nexthop: fix incorrect allocation failure on nhg->spare

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 28 May 2020 15:51:14 +0100
From:   Colin King <colin.king@...onical.com>
To:     David Ahern <dsahern@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][net-next] nexthop: fix incorrect allocation failure on nhg->spare

From: Colin Ian King <colin.king@...onical.com>

The allocation failure check for nhg->spare is currently checking
the pointer nhg rather than nhg->spare which is never false. Fix
this by checking nhg->spare instead.

Addresses-Coverity: ("Logically dead code")
Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 net/ipv4/nexthop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index ebafa5ed91ac..97423d6f2de9 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -1185,7 +1185,7 @@ static struct nexthop *nexthop_create_group(struct net *net,
 
 	/* spare group used for removals */
 	nhg->spare = nexthop_grp_alloc(num_nh);
-	if (!nhg) {
+	if (!nhg->spare) {
 		kfree(nhg);
 		kfree(nh);
 		return NULL;
-- 
2.25.1