linux-kernel - [PATCH] NFC: Handle return value of skb

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]

Date:   Sun, 17 Dec 2017 01:14:20 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     sameo@...ux.intel.com, davem@...emloft.net
Cc:     linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: [PATCH] NFC: Handle return value of skb_dequeue()

skb_dequeue() will return NULL for an empty list or a pointer
to the head element.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 net/nfc/rawsock.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index e2188de..c6de1ac 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -201,6 +201,10 @@ static void rawsock_tx_work(struct work_struct *work)
 	}
 
 	skb = skb_dequeue(&sk->sk_write_queue);
+	if (!skb) {
+		rawsock_write_queue_purge(sk);
+		return;
+	}
 
 	sock_hold(sk);
 	rc = nfc_data_exchange(dev, target_idx, skb,
-- 
2.7.4