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| author | Alex Williamson <alex.williamson@redhat.com> | 2017-06-19 09:10:32 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-27 15:08:03 -0700 |
| commit | e91a55790ddfbda7f9f72963e561d9c738f14a52 (patch) | |
| tree | bd8e958ed90b2a9d407ae7ca77887c82eba82fe7 /include/linux/vfio.h | |
| parent | fee760fc6c79998efc48bd06afeec31824dfb2d4 (diff) | |
vfio: Fix group release deadlock
commit 811642d8d8a82c0cce8dc2debfdaf23c5a144839 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/vfio.h')
0 files changed, 0 insertions, 0 deletions