linux-kernel - Re: KMSAN: kernel-infoleak in move_addr_to

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Message-ID: <CAM_iQpXbARpYRxFv4g2gC1+oPfdpKx8mMD_7d6BjWr5mPn3nrg@mail.gmail.com>
Date:   Mon, 11 Jan 2021 16:17:03 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     syzbot <syzbot+057884e2f453e8afebc8@...kaller.appspotmail.com>,
        Robin van der Gracht <robin@...tonic.nl>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-can@...r.kernel.org, David Miller <davem@...emloft.net>,
        Alexander Potapenko <glider@...gle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: KMSAN: kernel-infoleak in move_addr_to_user (4)

On Mon, Jan 11, 2021 at 11:33 AM Jakub Kicinski <kuba@...nel.org> wrote:
>
> Looks like a AF_CAN socket:
>
> r0 = socket(0x1d, 0x2, 0x6)
> getsockname$packet(r0, &(0x7f0000000100)={0x11, 0x0, 0x0, 0x1, 0x0, 0x6, @broadcast}, &(0x7f0000000000)=0x14)
>

Right, it seems we need a memset(0) in isotp_getname().

Thanks.