netdev - [PATCH 4/5] netfilter: nfnetlink: Clean up tests if NULL returned on failure

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

Message-Id: <1490085879-1827-5-git-send-email-singhalsimran0@gmail.com>
Date:   Tue, 21 Mar 2017 14:14:38 +0530
From:   simran singhal <singhalsimran0@...il.com>
To:     pablo@...filter.org
Cc:     kadlec@...ckhole.kfki.hu, davem@...emloft.net,
        netfilter-devel@...r.kernel.org, coreteam@...filter.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        gregkh@...uxfoundation.org, outreachy-kernel@...glegroups.com
Subject: [PATCH 4/5] netfilter: nfnetlink: Clean up tests if NULL returned on failure

Some functions like kmalloc/kzalloc return NULL on failure. When NULL
represents failure, !x is commonly used.

This was done using Coccinelle:
@@
expression *e;
identifier l1;
@@
e = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\)(...);
...
- e == NULL
+ !e

Signed-off-by: simran singhal <singhalsimran0@...il.com>
---

 --This is my contribution to the netfilter project of
   Outreachy Round 14.

 net/netfilter/nfnetlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 68eda920..c39f16c 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -232,7 +232,7 @@ static int nfnl_err_add(struct list_head *list, struct nlmsghdr *nlh, int err)
 	struct nfnl_err *nfnl_err;
 
 	nfnl_err = kmalloc(sizeof(struct nfnl_err), GFP_KERNEL);
-	if (nfnl_err == NULL)
+	if (!nfnl_err)
 		return -ENOMEM;
 
 	nfnl_err->nlh = nlh;
-- 
2.7.4