linux-kernel - Re: WARNING in compat_copy

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Message-ID: <20190414223236.amahulln6fw4hwaw@breakpoint.cc>
Date:   Mon, 15 Apr 2019 00:32:36 +0200
From:   Florian Westphal <fw@...len.de>
To:     Andy Lutomirski <luto@...capital.net>
Cc:     syzbot <syzbot+659574e7bcc7f7eb4df7@...kaller.appspotmail.com>,
        alexl@...hat.com, bridge@...ts.linux-foundation.org,
        coreteam@...filter.org, cosimo@...lessm.com, davem@...emloft.net,
        dvyukov@...gle.com, fw@...len.de, kadlec@...ckhole.kfki.hu,
        libc-alpha@...rceware.org, linux-kernel@...r.kernel.org,
        luto@...nel.org, mingo@...nel.org, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, nicholson@...lessm.com,
        pablo@...filter.org, peterz@...radead.org, raji@...ux.vnet.ibm.com,
        stephen@...workplumber.org, syzkaller-bugs@...glegroups.com,
        tglx@...utronix.de, torvalds@...ux-foundation.org,
        tuliom@...ux.vnet.ibm.com
Subject: Re: WARNING in compat_copy_entries (2)

Andy Lutomirski <luto@...capital.net> wrote:
> This is likely a confused bisection.  I bet that reverting this patch breaks your test but has nothing to do with the bug. Try reproducing with socketcall() to bisect farther.

No need, this WARN_ON can be removed. I'll send a patch.