netdev - Re: [PATCH net] net: switchdev: zero-initialize struct switchdev_notifier_fdb_info emitted by drivers towards the 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]

Date:   Tue, 10 Aug 2021 08:16:17 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Leon Romanovsky <leon@...nel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Vadym Kochan <vkochan@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Jiri Pirko <jiri@...dia.com>, Ido Schimmel <idosch@...dia.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>,
        Steen Hegelund <Steen.Hegelund@...rochip.com>,
        "UNGLinuxDriver@...rochip.com" <UNGLinuxDriver@...rochip.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Julian Wiedmann <jwi@...ux.ibm.com>,
        Karsten Graul <kgraul@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Jianbo Liu <jianbol@...dia.com>,
        Vlad Buslov <vladbu@...dia.com>,
        Bjarni Jonasson <bjarni.jonasson@...rochip.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tobias Waldekranz <tobias@...dekranz.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
        "linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
        Ido Schimmel <idosch@...sch.org>
Subject: Re: [PATCH net] net: switchdev: zero-initialize struct
 switchdev_notifier_fdb_info emitted by drivers towards the bridge

Hi Leon,

On Tue, Aug 10, 2021 at 09:50:41AM +0300, Leon Romanovsky wrote:
> > +	memset(&send_info, 0, sizeof(send_info));
> 
> This can be written simpler.
> struct switchdev_notifier_fdb_info send_info = {};
> 
> In all places.

Because the structure contains a sub-structure, I believe that a
compound literal initializer would require additional braces for the
initialization of its sub-objects too. At least I know that expressions
like that have attracted the attention of clang people in the past:
https://patchwork.ozlabs.org/project/netdev/patch/20190506202447.30907-1-natechancellor@gmail.com/
So I went for the 'unambiguous' path.