Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" (e.g. for performing a kexec) the libxl based Xen toolstack will normally perform a XS_RELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XS_RELEASE will have the same impact.
x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
The bug has been referenced in the following commit(s):
Author: Tomáš Mózes <email@example.com>
AuthorDate: 2023-05-02 22:25:36 +0000
Commit: Florian Schmaus <firstname.lastname@example.org>
CommitDate: 2023-05-16 07:33:51 +0000
app-emulation/xen: add 4.16.4/4.17.1
Signed-off-by: Tomáš Mózes <email@example.com>
Signed-off-by: Florian Schmaus <firstname.lastname@example.org>
app-emulation/xen/Manifest | 2 +
app-emulation/xen/xen-4.16.4.ebuild | 174 ++++++++++++++++++++++++++++++++++++
app-emulation/xen/xen-4.17.1.ebuild | 174 ++++++++++++++++++++++++++++++++++++
3 files changed, 350 insertions(+)
Apologies for the delay in handling.
Please stabilize when ready.