| commit | 956b56a984ddf10aa69b25318dc04430101beed6 | |
| author | Alex Williamson <alex.williamson@redhat.com> | |
| Mon, 30 May 2016 13:50:10 +0000 (30 07:50 -0600) | ||
| committer | Alex Williamson <alex.williamson@redhat.com> | |
| Mon, 30 May 2016 13:50:10 +0000 (30 07:50 -0600) | ||
| tree | 5d698890a0f6ab87af4c647908395f51d30e8356 | treesnapshot (tar.gz zip) |
| parent | 1a695a905c18548062509178b98bc91e67510864 | commitdiff |
vfio/pci: Fix ordering of eventfd vs virqfd shutdown
Both the INTx and MSI/X disable paths do an eventfd_ctx_put() for the
trigger eventfd before calling vfio_virqfd_disable() any potential
mask and unmask eventfds. This opens a use-after-free race where an
inopportune irqfd can reference the freed signalling eventfd. Reorder
to avoid this possibility.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Both the INTx and MSI/X disable paths do an eventfd_ctx_put() for the
trigger eventfd before calling vfio_virqfd_disable() any potential
mask and unmask eventfds. This opens a use-after-free race where an
inopportune irqfd can reference the freed signalling eventfd. Reorder
to avoid this possibility.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| drivers/vfio/pci/vfio_pci_intrs.c | diffblobblamehistory |