tree 74c821845a28a43278cf4522f0871f70dcbb2ba4
parent fd8b79511349efd1f0decea920f61b93acb34a75
author Juergen Gross <jgross@suse.com> 1413277218 +0200
committer David Vrabel <david.vrabel@citrix.com> 1414077841 +0100

x86/xen: avoid writing to freed memory after race in p2m handling

In case a race was detected during allocation of a new p2m tree
element in alloc_p2m() the new allocated mid_mfn page is freed without
updating the pointer to the found value in the tree. This will result
in overwriting the just freed page with the mfn of the p2m leaf.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>