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Date: Wed, 18 Feb 2026 23:22:46 +0000
From: Wei Liu <wei.liu@kernel.org>
To: Ethan Tidmore <ethantidmore06@gmail.com>
Cc: "K . Y . Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
	Long Li <longli@microsoft.com>,
	Saurabh Sengar <ssengar@linux.microsoft.com>,
	Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Michael Kelley <mhklinux@outlook.com>, x86@kernel.org,
	linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86/hyperv: Fix error pointer dereference
Message-ID: <20260218232246.GJ2236050@liuwe-devbox-debian-v2.local>
References: <20260218190903.7874-1-ethantidmore06@gmail.com>
 <DGIBQKCDK1KA.1BU93405XZZ9R@gmail.com>
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In-Reply-To: <DGIBQKCDK1KA.1BU93405XZZ9R@gmail.com>

On Wed, Feb 18, 2026 at 01:11:18PM -0600, Ethan Tidmore wrote:
> On Wed Feb 18, 2026 at 1:09 PM CST, Ethan Tidmore wrote:
> > The function idle_thread_get() can return an error pointer and is not
> > checked for it. Add check for error pointer.
> >
> > Detected by Smatch:
> > arch/x86/hyperv/hv_vtl.c:126 hv_vtl_bringup_vcpu() error:
> > 'idle' dereferencing possible ERR_PTR()
> >
> > Fixes: 2b4b90e053a29 ("x86/hyperv: Use per cpu initial stack for vtl context")
> > Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
> > ---
> 
> Oops, forgot v2 header this is the v2.

Applied. Thanks.