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| author | Alex Williamson <alex.williamson@redhat.com> | 2017-06-19 09:10:32 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2017-06-28 13:49:38 -0600 |
| commit | 811642d8d8a82c0cce8dc2debfdaf23c5a144839 (patch) | |
| tree | 8b64ef6d040f88ec61d6c12c82ebdb43843c3712 /virt/kvm/vfio.c | |
| parent | 7b3a10df1d4bd8a83934897442370221b4cd631b (diff) | |
| download | op-kernel-dev-811642d8d8a82c0cce8dc2debfdaf23c5a144839.zip op-kernel-dev-811642d8d8a82c0cce8dc2debfdaf23c5a144839.tar.gz | |
vfio: Fix group release deadlock
If vfio_iommu_group_notifier() acquires a group reference and that
reference becomes the last reference to the group, then vfio_group_put
introduces a deadlock code path where we're trying to unregister from
the iommu notifier chain from within a callout of that chain. Use a
work_struct to release this reference asynchronously.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'virt/kvm/vfio.c')
0 files changed, 0 insertions, 0 deletions
