diff options
| author | Juergen Gross <jgross@suse.com> | 2022-02-25 16:05:42 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-11 10:03:32 +0100 |
| commit | 98bdfdf89e987406f4afdc7694cbdbb715383d8e (patch) | |
| tree | 437a371ce3098312e676be49b422d0c2848e2fbd /drivers/devfreq | |
| parent | 1112bb311ec13e7e6e7045ae4a0b7091bedc6b7a (diff) | |
xen/scsifront: don't use gnttab_query_foreign_access() for mapped status
Commit 33172ab50a53578a95691310f49567c9266968b0 upstream.
It isn't enough to check whether a grant is still being in use by
calling gnttab_query_foreign_access(), as a mapping could be realized
by the other side just after having called that function.
In case the call was done in preparation of revoking a grant it is
better to do so via gnttab_try_end_foreign_access() and check the
success of that operation instead.
This is CVE-2022-23038 / part of XSA-396.
Reported-by: Demi Marie Obenour <demi@invisiblethingslab.com>
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/devfreq')
0 files changed, 0 insertions, 0 deletions