android_kernel_oneplus_msm8998/drivers/xen
Juergen Gross c73eb1e0cc xen: xenbus driver must not accept invalid transaction ids
[ Upstream commit 639b08810d6ad74ded2c5f6e233c4fcb9d147168 ]

When accessing Xenstore in a transaction the user is specifying a
transaction id which he normally obtained from Xenstore when starting
the transaction. Xenstore is validating a transaction id against all
known transaction ids of the connection the request came in. As all
requests of a domain not being the one where Xenstore lives share
one connection, validation of transaction ids of different users of
Xenstore in that domain should be done by the kernel of that domain
being the multiplexer between the Xenstore users in that domain and
Xenstore.

In order to prohibit one Xenstore user "hijacking" a transaction from
another user the xenbus driver has to verify a given transaction id
against all known transaction ids of the user before forwarding it to
Xenstore.

Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-30 08:37:28 +00:00
..
events
xen-pciback xen/pciback: Fix conf_space read/write overlap check. 2016-08-10 11:49:26 +02:00
xenbus xen: xenbus driver must not accept invalid transaction ids 2017-11-30 08:37:28 +00:00
xenfs
acpi.c
balloon.c xen/balloon: Fix declared-but-not-defined warning 2016-07-27 09:47:36 -07:00
biomerge.c xen: fix bio vec merging 2017-08-24 17:02:36 -07:00
cpu_hotplug.c
dbgp.c
efi.c
evtchn.c
fallback.c
features.c
gntalloc.c
gntdev.c xen/gntdev: avoid out of bounds access in case of partial gntdev_mmap() 2017-11-02 09:40:49 +01:00
grant-table.c
Kconfig
Makefile
manage.c xen: don't print error message in case of missing Xenstore entry 2017-11-08 10:06:30 +01:00
mcelog.c
pci.c
pcpu.c
platform-pci.c
preempt.c
privcmd.c xen/privcmd: Support correctly 64KB page granularity when mapping memory 2017-06-14 13:16:22 +02:00
privcmd.h
swiotlb-xen.c fix xen_swiotlb_dma_mmap prototype 2017-10-05 09:41:48 +02:00
sys-hypervisor.c
tmem.c
xen-acpi-cpuhotplug.c
xen-acpi-memhotplug.c
xen-acpi-pad.c
xen-acpi-processor.c xen/acpi: upload PM state from init-domain to Xen 2017-03-30 09:35:18 +02:00
xen-balloon.c
xen-scsiback.c
xen-selfballoon.c
xen-stub.c
xlate_mmu.c