linux-kernel - Re: [report] use-after-free in __irq_resolve

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Message-ID: <87im2lrj3m.wl-maz@kernel.org>
Date:   Thu, 10 Jun 2021 13:37:33 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     John Garry <john.garry@...wei.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [report] use-after-free in __irq_resolve_mapping()

On Wed, 09 Jun 2021 12:59:26 +0100,
John Garry <john.garry@...wei.com> wrote:
> 
> JFYI, on -next 20210608, I find this on my arm64 D06 and D05:

[...]

Funny what happens when you blindly replace radix_tree_delete() with
radix_tree_insert(NULL) and fail to realise that no, they aren't
equivalent... I'll pick a brown paper bag from the stack.

I'll run some more tests on some of the bigger iron before rebuilding
irq/irqchip-next, but it certainly looks less broken now.

Thanks again,

	M.

-- 
Without deviation from the norm, progress is not possible.