linux-kernel - Re: [PATCH qemu] x86: don't let decompressed kernel image clobber setup

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Message-ID: <Y7AxGiGQYZNJWpCr@zx2c4.com>
Date:   Sat, 31 Dec 2022 13:54:50 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "H. Peter Anvin" <hpa@...or.com>, pbonzini@...hat.com,
        ebiggers@...nel.org, x86@...nel.org, linux-kernel@...r.kernel.org,
        qemu-devel@...gnu.org, ardb@...nel.org, kraxel@...hat.com,
        philmd@...aro.org
Subject: Re: [PATCH qemu] x86: don't let decompressed kernel image clobber
 setup_data

On Sat, Dec 31, 2022 at 10:48:16AM +0100, Borislav Petkov wrote:
> On Fri, Dec 30, 2022 at 04:59:30PM +0100, Jason A. Donenfeld wrote:
> > I'll attach a .config file. Apply the patch at the top of this thread to
> > qemu,
> 
> Hmm, so the patch at the top of this thread is fixing the clobbering of
> setup_data.
> 
> But I tried latest qemu with your .config and it boots ok here. So how do I
> repro the original issue you're trying to fix?

Nothing special... `-kernel bzImage` should be enough to do it. Eric
reported it, and then I was able to repro trivially. Sure you got the
right version?

Jason