linux-kernel - Re: general protection fault in xsk

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Message-ID: <CACT4Y+YsSxY=sWHWAahXHj86HbBJ39pPfQqwS3-b1VfFOGz01A@mail.gmail.com>
Date:   Fri, 15 Jan 2021 14:50:31 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Björn Töpel <bjorn.topel@...el.com>
Cc:     syzbot <syzbot+b974d32294d1dffbea36@...kaller.appspotmail.com>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>
Subject: Re: general protection fault in xsk_recvmsg

On Fri, Jan 15, 2021 at 1:50 PM Björn Töpel <bjorn.topel@...el.com> wrote:
>
> #syz fix: xsk: Validate socket state in xsk_recvmsg, prior touching
> socket members

-most

This got unrecoverably corrupted with line wraps by email client.
As my client does the same, there is a special hack that allows to
send a least a little bit longer titles w/o line wrapping: syz fix
alone on one line and whole title on the next line:

#syz fix:
xsk: Validate socket state in xsk_recvmsg, prior touching socket members