linux-kernel - [PATCH] Bluetooth: A2MP: Do not set rsp.id to zero

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: <1603008332-8402-1-git-send-email-gotti79@posteo.net>
Date:   Sun, 18 Oct 2020 10:05:32 +0200
From:   Stefan Gottwald <gotti79@...teo.net>
To:     marcel@...tmann.org
Cc:     gregkh@...uxfoundation.org, gottwald@...l.com, gotti79@...teo.net,
        Johan Hedberg <johan.hedberg@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] Bluetooth: A2MP: Do not set rsp.id to zero

Due to security reasons the rsp struct is not zerod out in one case this will
also zero out the former set rsp.id which seems to be wrong.

Signed-off-by: Stefan Gottwald <gotti79@...teo.net>
---
 net/bluetooth/a2mp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index da7fd7c..7a1e0b7 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -381,10 +381,11 @@ static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
 	hdev = hci_dev_get(req->id);
 	if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) {
 		struct a2mp_amp_assoc_rsp rsp;
-		rsp.id = req->id;
 
 		memset(&rsp, 0, sizeof(rsp));
 
+		rsp.id = req->id;
+
 		if (tmp) {
 			rsp.status = A2MP_STATUS_COLLISION_OCCURED;
 			amp_mgr_put(tmp);
-- 
2.7.4