linux-kernel - Re: [PATCH] idr: fix invalid ptr dereference on item delete

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Message-ID: <2516f92a-a130-1c90-ff3c-dcff14d5c577@redhat.com>
Date:   Fri, 11 May 2018 11:12:49 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Roman Kagan <rkagan@...tuozzo.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        syzbot <syzbot+35666cba7f0a337e2e79@...kaller.appspotmail.com>,
        "H. Peter Anvin" <hpa@...or.com>, KVM list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        the arch/x86 maintainers <x86@...nel.org>,
        Cathy Avery <cavery@...hat.com>,
        stable <stable@...r.kernel.org>
Subject: Re: [PATCH] idr: fix invalid ptr dereference on item delete

On 11/05/2018 07:57, Roman Kagan wrote:
>>> Should radix-tree be compilable in userspace, so that we can add unit
>>> tests for it?...
>> Good point.
>>
>> For my education, what/where are the tests that run as user-space code?
> Actually there are userspace tests for it under tools/tests/radix-tree,
> but I didn't manage to get them to build.  Looks like the recent
> introduction of a spin_lock in the radix_tree structure (for XArray
> work?) broke them.

Oh cool, at least it means it was a good suggestion. :)

Paolo