linux-kernel - [PATCH 4.4 267/312] rtnl: reset calcit fptr in rtnl

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Message-Id: <20200508123143.214629119@linuxfoundation.org>
Date:   Fri,  8 May 2020 14:34:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        Greg Rose <gregory.v.rose@...el.com>,
        Mathias Krause <minipli@...glemail.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 267/312] rtnl: reset calcit fptr in rtnl_unregister()

From: Mathias Krause <minipli@...glemail.com>

commit f567e950bf51290755a2539ff2aaef4c26f735d3 upstream.

To avoid having dangling function pointers left behind, reset calcit in
rtnl_unregister(), too.

This is no issue so far, as only the rtnl core registers a netlink
handler with a calcit hook which won't be unregistered, but may become
one if new code makes use of the calcit hook.

Fixes: c7ac8679bec9 ("rtnetlink: Compute and store minimum ifinfo...")
Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc: Greg Rose <gregory.v.rose@...el.com>
Signed-off-by: Mathias Krause <minipli@...glemail.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/core/rtnetlink.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -253,6 +253,7 @@ int rtnl_unregister(int protocol, int ms

 	rtnl_msg_handlers[protocol][msgindex].doit = NULL;
 	rtnl_msg_handlers[protocol][msgindex].dumpit = NULL;
+	rtnl_msg_handlers[protocol][msgindex].calcit = NULL;

 	return 0;
 }