netdev - [PATCH] ethtool: potential NULL dereference in strset_prepare

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]

Message-ID: <20200108054236.ult5qxiiwpw2wamk@kili.mountain>
Date:   Wed, 8 Jan 2020 08:42:36 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     Michal Kubecek <mkubecek@...e.cz>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] ethtool: potential NULL dereference in strset_prepare_data()

Smatch complains that the NULL checking isn't done consistently:

    net/ethtool/strset.c:253 strset_prepare_data()
    error: we previously assumed 'dev' could be null (see line 233)

It looks like there is a missing return on this path.

Fixes: 71921690f974 ("ethtool: provide string sets with STRSET_GET request")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 net/ethtool/strset.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 9f2243329015..82a059c13c1c 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -239,6 +239,7 @@ static int strset_prepare_data(const struct ethnl_req_info *req_base,
 				return -EINVAL;
 			}
 		}
+		return 0;
 	}
 
 	ret = ethnl_ops_begin(dev);
-- 
2.11.0