netdev - [PATCH 07/31] staging: wfx: fix atomic accesses in wfx_tx_queue

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]

Date:   Fri, 10 Sep 2021 18:04:40 +0200
From:   Jerome Pouiller <Jerome.Pouiller@...abs.com>
To:     devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller 
        <jerome.pouiller@...abs.com>
Subject: [PATCH 07/31] staging: wfx: fix atomic accesses in wfx_tx_queue_empty()

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

Checking if a skb_queue is empty is not an atomic operation. We should
take some precautions to do it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/queue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/wfx/queue.c b/drivers/staging/wfx/queue.c
index 31c37f69c295..fa272c120f1c 100644
--- a/drivers/staging/wfx/queue.c
+++ b/drivers/staging/wfx/queue.c
@@ -86,7 +86,8 @@ void wfx_tx_queues_check_empty(struct wfx_vif *wvif)
 
 bool wfx_tx_queue_empty(struct wfx_vif *wvif, struct wfx_queue *queue)
 {
-	return skb_queue_empty(&queue->normal) && skb_queue_empty(&queue->cab);
+	return skb_queue_empty_lockless(&queue->normal) &&
+	       skb_queue_empty_lockless(&queue->cab);
 }
 
 static void __wfx_tx_queue_drop(struct wfx_vif *wvif,
-- 
2.33.0