android_kernel_motorola_sm6375/drivers/xen
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Juergen Gross d9d4ea17d6 xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status
[ Upstream commit 6b51fd3f65a22e3d1471b18a1d56247e246edd46 ]

xenbus_map_ring_valloc() maps a ring page and returns the status of the
used grant (0 meaning success).

There are Xen hypervisors which might return the value 1 for the status
of a failed grant mapping due to a bug. Some callers of
xenbus_map_ring_valloc() test for errors by testing the returned status
to be less than zero, resulting in no error detected and crashing later
due to a not available ring page.

Set the return value of xenbus_map_ring_valloc() to GNTST_general_error
in case the grant status reported by Xen is greater than zero.

This is part of XSA-316.

Signed-off-by: Juergen Gross <[email protected]>
Reviewed-by: Wei Liu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Juergen Gross <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
2020-05-02 08:48:57 +02:00
..
events
xen-pciback
xenbus xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status 2020-05-02 08:48:57 +02:00
xenfs
acpi.c
arm-device.c
balloon.c xen/balloon: fix ballooned page accounting without hotplug enabled 2020-01-09 10:19:51 +01:00
biomerge.c
cpu_hotplug.c
dbgp.c
efi.c xen/efi: have a common runtime setup function 2019-10-02 10:31:07 -04:00
evtchn.c
features.c
gntalloc.c
gntdev-common.h
gntdev-dmabuf.c
gntdev-dmabuf.h
gntdev.c xen: Stop abusing DT of_dma_configure API 2019-10-10 11:43:35 -04:00
grant-table.c xen/grant-table: remove unnecessary printing 2019-10-10 10:41:30 -04:00
Kconfig xen/gntdev: Use select for DMA_SHARED_BUFFER 2019-12-31 16:45:01 +01:00
Makefile
manage.c
mcelog.c
mem-reservation.c
pci.c
pcpu.c
platform-pci.c
preempt.c xen: Enable interrupts when calling _cond_resched() 2020-02-28 17:22:28 +01:00
privcmd-buf.c
privcmd.c
privcmd.h
pvcalls-back.c net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head 2019-10-09 21:34:31 -07:00
pvcalls-front.c
pvcalls-front.h
swiotlb-xen.c
sys-hypervisor.c
time.c
xen-acpi-cpuhotplug.c
xen-acpi-memhotplug.c
xen-acpi-pad.c
xen-acpi-processor.c
xen-balloon.c xen/balloon: Support xend-based toolstack take two 2020-02-11 04:35:36 -08:00
xen-front-pgdir-shbuf.c
xen-scsiback.c
xen-stub.c
xlate_mmu.c