Re: Linux 5.15.103

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On Tue, Mar 28, 2023 at 02:29:11PM +0200, Mathias Krause wrote:
On 28.03.23 14:14, Greg Kroah-Hartman wrote:
On Tue, Mar 28, 2023 at 02:02:03PM +0200, Mathias Krause wrote:
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.

It wasn't tagged for the stable kernels, so we didn't pick it up :(

Neither were any of the above commits. o.O

Commit 3e48a6349d29 ("KVM: Optimize kvm_make_vcpus_request_mask() a
bit") has this tag, though:

Stable-dep-of: 2b0128127373 ("KVM: Register /dev/kvm as the _very_ last
thing during initialization")

I don't know why, though. These two commits have little in common.
Maybe Sasha knows why?

Because you've skipped the commit in the middle of the two you've
pointed out :)

3e48a6349d29 is needed by 0a0ecaf0988b ("KVM: Pre-allocate cpumasks for
kvm_make_all_cpus_request_except()"), which in turn is needed by
2b0128127373.

--
Thanks,
Sasha



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