diff options
| author | Juergen Gross <jgross@suse.com> | 2020-11-03 17:22:29 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-18 18:25:02 +0100 |
| commit | 2e76c99ffbf9b054001d5753feb86910c91138ea (patch) | |
| tree | 4c714a37ef273531c3c7bbede43723af1273a8b6 /drivers/net/xen-netback/interface.c | |
| parent | 33f38ccfe479fdb53bf0409e9b74e993e30d4d1f (diff) | |
xen/events: fix race in evtchn_fifo_unmask()
commit f01337197419b7e8a492e83089552b77d3b5fb90 upstream.
Unmasking a fifo event channel can result in unmasking it twice, once
directly in the kernel and once via a hypercall in case the event was
pending.
Fix that by doing the local unmask only if the event is not pending.
This is part of XSA-332.
Cc: stable@vger.kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/xen-netback/interface.c')
0 files changed, 0 insertions, 0 deletions