netdev - [PATCH] fm10k_main.c: fix missing return value check of alloc

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>] [day] [month] [year] [list]

Message-Id: <20180818022717.13368-1-jasonwood2031@gmail.com>
Date:   Sat, 18 Aug 2018 10:27:17 +0800
From:   Jiecheng Wu <jasonwood2031@...il.com>
To:     netdev@...r.kernel.org
Subject: [PATCH] fm10k_main.c: fix missing return value check of alloc_skb()

Function fm10k_init_module() defined in drivers/net/ethernet/intel/fm10k/fm10k_main.c
 calls alloc_workqueue() to allocate memory for struct workqueue_struct which is 
 dereferenced immediately. As alloc_workqueue() may return NULL on failure, 
 this code piece may cause NULL pointer dereference bug.
---
 drivers/net/ethernet/intel/fm10k/fm10k_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_main.c b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
index 3f53654..78a43d6 100644
--- a/drivers/net/ethernet/intel/fm10k/fm10k_main.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_main.c
@@ -41,6 +41,8 @@ static int __init fm10k_init_module(void)
 	/* create driver workqueue */
 	fm10k_workqueue = alloc_workqueue("%s", WQ_MEM_RECLAIM, 0,
 					  fm10k_driver_name);
+	if (!fm10k_workqueue)
+		return -ENOMEM;
 
 	fm10k_dbg_init();
 
-- 
2.6.4