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Message-ID: <c359c777-c3af-b4a6-791d-d51916160bf5@grsecurity.net>
Date:   Tue, 28 Mar 2023 14:02:03 +0200
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Subject: Re: Linux 5.15.103
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To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, akpm@linux-foundation.org,
        torvalds@linux-foundation.org, lwn@lwn.net, jslaby@suse.cz
References: <1679040264214179@kroah.com>
From:   Mathias Krause <minipli@grsecurity.net>
In-Reply-To: <1679040264214179@kroah.com>
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On 17.03.23 09:04, Greg Kroah-Hartman wrote:
> I'm announcing the release of the 5.15.103 kernel.
> 
> [...]
> 
> Vitaly Kuznetsov (4):
>       KVM: Optimize kvm_make_vcpus_request_mask() a bit
>       KVM: Pre-allocate cpumasks for kvm_make_all_cpus_request_except()
>       KVM: nVMX: Don't use Enlightened MSR Bitmap for L3
>       KVM: VMX: Introduce vmx_msr_bitmap_l01_changed() helper
> 

That list is missing commit 6470accc7ba9 ("KVM: x86: hyper-v: Avoid
calling kvm_make_vcpus_request_mask() with vcpu_mask==NULL") to fulfill
the prerequisite of "KVM: Optimize kvm_make_vcpus_request_mask() a bit".

Right now the kvm selftests trigger a kernel NULL deref for the hyperv
test, making the system hang.

Please consider applying commit 6470accc7ba9 for the next v5.15.x release.

Thanks,
Mathias