Re: [GIT PULL v1 00/23] KVM: s390: Misc KVM and vfio-ccw fixes

On Mon, Aug 3, 2026 at 6:09 PM Claudio Imbrenda <[email protected]> wrote:
>
> Ciao Paolo,
>
> In this pull request there are a bunch of fixes to various KVM/s390 and
> vfio-ccw issues.
>
> There are still some small known bugs, which will be addressed later in
> a different series.
>
> The following changes since commit 9972befc3e34ff8b6847198c84f11bfc312dde40:
>
>   KVM: s390: Fall back to short-term pinning in MAP ioctl (2026-07-27 09:23:53 +0200)
>
> are available in the Git repository at:
>
>   https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git tags/kvm-s390-master-7.2-3
>
> for you to fetch changes up to feadc5e84dcb53422a437556c35af9efd9826fd5:
>
>   KVM: s390: Fix cleanup in kvm_s390_pv_create_cpu() (2026-08-03 17:09:46 +0200)

Pulled, thanks.

Paolo

> ----------------------------------------------------------------
> KVM: s390: Misc fixes for 7.2
>
> Fix a bunch of small issues that came up during the previous round of
> fixes.
>
> They are mostly extremely unlikely races, but they should be fixed
> nonetheless.
>
> ----------------------------------------------------------------
> Claudio Imbrenda (13):
>       KVM: s390: Fix unlikely NULL gmap dereference
>       KVM: s390: Do not free SCA if it was not allocated
>       KVM: s390: Fix kvm_s390_vcpu_unsetup_cmma()
>       KVM: s390: Fix overclearing ESCA in case of error
>       KVM: s390: ucontrol: Fix sca_clear_ext_call()
>       KVM: s390: Fix leaking of PGM_ADDRESSING to userspace
>       KVM: s390: Fix race in __do_essa()
>       KVM: s390: cmma: Fix dirty tracking when removing memslot
>       KVM: s390: ucontrol: Add missing locking around gmap_remove_child()
>       KVM: s390: Free the mmu cache when kvm_arch_vcpu_create() fails
>       KVM: s390: Return -EINTR if a signal is pending while faulting-in
>       KVM: s390: Fix ordering when adding to SCA
>       KVM: s390: Fix cleanup in kvm_s390_pv_create_cpu()
>
> Eric Farman (10):
>       s390/vfio_ccw: Free all memory if cp_init() fails
>       s390/vfio_ccw: Limit the number of channel program segments
>       s390/vfio_ccw: Fix out of bounds check on CCW array
>       s390/vfio_ccw: Ensure first IDAW remains constant
>       s390/vfio_ccw: Calculate idal length based on idaw type
>       s390/vfio_ccw: Ensure index for read/write regions are within range
>       s390/vfio_ccw: Cancel existing workqueues
>       s390/vfio_ccw: Move cp cleanup out of not operational
>       s390/vfio_ccw: Selectively expand io_mutex
>       s390/vfio_ccw: Implement a crw lock
>
>  arch/s390/include/asm/kvm_host.h    |   1 +
>  arch/s390/kvm/dat.c                 |  23 +++++--
>  arch/s390/kvm/dat.h                 |   2 +-
>  arch/s390/kvm/faultin.c             |   6 +-
>  arch/s390/kvm/interrupt.c           |  19 ++++--
>  arch/s390/kvm/kvm-s390.c            | 125 +++++++++++++++++++++++-------------
>  arch/s390/kvm/priv.c                |  10 +--
>  arch/s390/kvm/pv.c                  |  43 +++++++------
>  drivers/s390/cio/vfio_ccw_async.c   |  16 +++++
>  drivers/s390/cio/vfio_ccw_chp.c     |  31 +++++++--
>  drivers/s390/cio/vfio_ccw_cp.c      |  74 +++++++++++++++------
>  drivers/s390/cio/vfio_ccw_cp.h      |  10 +++
>  drivers/s390/cio/vfio_ccw_drv.c     |  21 +++++-
>  drivers/s390/cio/vfio_ccw_fsm.c     |   8 ++-
>  drivers/s390/cio/vfio_ccw_ops.c     |  39 +++++++++--
>  drivers/s390/cio/vfio_ccw_private.h |  10 ++-
>  16 files changed, 320 insertions(+), 118 deletions(-)
>