Juergen Gross fe415186b4 xen/console: harden hvc_xen against event channel storms ... The Xen console driver is still vulnerable for an attack via excessive number of events sent by the backend. Fix that by using a lateeoi event channel. For the normal domU initial console this requires the introduction of bind_evtchn_to_irq_lateeoi() as there is no xenbus device available at the time the event channel is bound to the irq. As the decision whether an interrupt was spurious or not requires to test for bytes having been read from the backend, move sending the event into the if statement, as sending an event without having found any bytes to be read is making no sense at all. This is part of XSA-391 Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> --- V2: - slightly adapt spurious irq detection (Jan Beulich) V3: - fix spurious irq detection (Jan Beulich)		2021-12-16 08:24:08 +01:00
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events	xen/console: harden hvc_xen against event channel storms	2021-12-16 08:24:08 +01:00
xen-pciback	xen-pciback: allow compiling on other archs than x86	2021-11-02 08:03:43 -05:00
xenbus	xen: detect uninitialized xenbus in xenbus_init	2021-11-24 08:55:15 -06:00
xenfs	Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-07-19 10:42:02 -07:00
Kconfig	xen/privcmd: make option visible in Kconfig	2021-11-16 16:13:31 -06:00
Makefile	xen-pciback: allow compiling on other archs than x86	2021-11-02 08:03:43 -05:00
acpi.c	…
arm-device.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201	2019-05-30 11:29:52 -07:00
balloon.c	xen/balloon: fix unused-variable warning	2021-11-08 10:40:17 -06:00
biomerge.c	…
cpu_hotplug.c	xen/cpuhotplug: Fix initial CPU offlining for PV(H) guests	2020-05-21 13:01:45 -05:00
dbgp.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
efi.c	xen/efi: have a common runtime setup function	2019-10-02 10:31:07 -04:00
evtchn.c	xen/evtchn: use READ/WRITE_ONCE() for accessing ring indices	2021-02-23 10:07:52 -06:00
features.c	xen: check required Xen features	2021-08-30 11:57:45 +02:00
gntalloc.c	…
gntdev-common.h	xen: Use evtchn_type_t as a type for event channels	2020-04-07 12:12:54 +02:00
gntdev-dmabuf.c	dma-buf: move dma-buf symbols into the DMA_BUF module namespace	2021-10-25 14:53:08 +02:00
gntdev-dmabuf.h	…
gntdev.c	Xen/gntdev: don't ignore kernel unmapping error	2021-09-20 16:57:08 +02:00
grant-table.c	xen: don't use page->lru for ZONE_DEVICE memory	2020-12-09 10:31:41 +01:00
manage.c	xen/manage: Fix fall-through warnings for Clang	2020-12-16 07:58:44 +01:00
mcelog.c	xen/mcelog: add PPIN to record when available	2019-11-14 10:01:57 +01:00
mem-reservation.c	x86/xen: remove 32-bit pv leftovers	2021-11-02 08:03:43 -05:00
pci.c	xen-pciback: allow compiling on other archs than x86	2021-11-02 08:03:43 -05:00
pcpu.c	xen: Use DEVICE_ATTR_*() macro	2021-07-05 09:23:31 +02:00
platform-pci.c	xen: Set platform PCI device INTX affinity to CPU0	2021-01-13 16:12:03 +01:00
privcmd-buf.c	…
privcmd.c	xen/privcmd: drop "pages" parameter from xen_remap_pfn()	2021-10-05 08:20:27 +02:00
privcmd.h	…
pvcalls-back.c	xen/pvcalls-back: Remove redundant 'flush_workqueue()' calls	2021-11-02 07:45:44 -05:00
pvcalls-front.c	xen: flag pvcalls-front to be not essential for system boot	2021-11-23 13:42:20 -06:00
pvcalls-front.h	…
swiotlb-xen.c	Merge branch 'akpm' (patches from Andrew)	2021-11-06 14:08:17 -07:00
sys-hypervisor.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
time.c	x86/paravirt: Switch time pvops functions to use static_call()	2021-03-11 16:17:52 +01:00
unpopulated-alloc.c	xen/unpopulated-alloc: fix error return code in fill_list()	2021-05-10 09:42:25 +02:00
xen-acpi-pad.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
xen-acpi-processor.c	xen: Fix implicit type conversion	2021-11-02 07:45:44 -05:00
xen-balloon.c	xen: Use DEVICE_ATTR_*() macro	2021-07-05 09:23:31 +02:00
xen-front-pgdir-shbuf.c	xen-front-pgdir-shbuf: don't record wrong grant handle upon error	2021-02-23 12:35:43 -06:00
xen-scsiback.c	isystem: trim/fixup stdarg.h and other headers	2021-08-19 09:02:55 +09:00
xlate_mmu.c	xen: add helpers to allocate unpopulated memory	2020-09-04 10:00:01 +02:00