linux-kernel - Re: [PATCH v1] KVM: x86: PMU Whitelist

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Message-ID: <CAOyeoRVncfuFjrseenE5c2qw3hBT_TM+YeQK-ZN=y-WE=gkc3Q@mail.gmail.com>
Date:   Mon, 24 Jun 2019 16:56:41 -0700
From:   Eric Hankland <ehankland@...gle.com>
To:     Andi Kleen <andi@...stfloor.org>
Cc:     linux-kernel@...r.kernel.org, linux-kvm@...r.kernel.org
Subject: Re: [PATCH v1] KVM: x86: PMU Whitelist

> Consider what happens when tmp.num_events is large enough to wrap size.
> I suspect that's a kernel exploit as written.

Thanks for pointing this out - I'll fix it in the next iteration.

> Also don't you need to copy tmp to new?
Yep - somehow I accidentally deleted the lines that did this before I
sent out the patch. I'll also fix this.