linux-kernel - [PATCH 5.15 551/917] net: bridge: fix uninitialized variables when BRIDGE

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: <20211115165447.466323240@linuxfoundation.org>
Date:   Mon, 15 Nov 2021 18:00:46 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Henrik Bjoernlund <henrik.bjoernlund@...rochip.com>,
        Ivan Vecera <ivecera@...hat.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 551/917] net: bridge: fix uninitialized variables when BRIDGE_CFM is disabled

From: Ivan Vecera <ivecera@...hat.com>

[ Upstream commit 829e050eea69c7442441b714b6f5b339b5b8c367 ]

Function br_get_link_af_size_filtered() calls br_cfm_{,peer}_mep_count()
that return a count. When BRIDGE_CFM is not enabled these functions
simply return -EOPNOTSUPP but do not modify count parameter and
calling function then works with uninitialized variables.
Modify these inline functions to return zero in count parameter.

Fixes: b6d0425b816e ("bridge: cfm: Netlink Notifications.")
Cc: Henrik Bjoernlund <henrik.bjoernlund@...rochip.com>
Signed-off-by: Ivan Vecera <ivecera@...hat.com>
Acked-by: Nikolay Aleksandrov <nikolay@...dia.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/bridge/br_private.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 37ca76406f1e8..fd5e7e74573ce 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -1911,11 +1911,13 @@ static inline int br_cfm_status_fill_info(struct sk_buff *skb,
 
 static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
 {
+	*count = 0;
 	return -EOPNOTSUPP;
 }
 
 static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
 {
+	*count = 0;
 	return -EOPNOTSUPP;
 }
 #endif
-- 
2.33.0