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linux/drivers/xen
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David Vrabel 77bb3dfdc0 xen/events: don't bind non-percpu VIRQs with percpu chip 
A non-percpu VIRQ (e.g., VIRQ_CONSOLE) may be freed on a different
VCPU than it is bound to.  This can result in a race between
handle_percpu_irq() and removing the action in __free_irq() because
handle_percpu_irq() does not take desc->lock.  The interrupt handler
sees a NULL action and oopses.

Only use the percpu chip/handler for per-CPU VIRQs (like VIRQ_TIMER).

  # cat /proc/interrupts | grep virq
   40:      87246          0  xen-percpu-virq      timer0
   44:          0          0  xen-percpu-virq      debug0
   47:          0      20995  xen-percpu-virq      timer1
   51:          0          0  xen-percpu-virq      debug1
   69:          0          0   xen-dyn-virq      xen-pcpu
   74:          0          0   xen-dyn-virq      mce
   75:         29          0   xen-dyn-virq      hvc_console

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: <stable@vger.kernel.org>
2015-05-19 19:55:36 +01:00
..
events xen/events: don't bind non-percpu VIRQs with percpu chip 2015-05-19 19:55:36 +01:00
xen-pciback xen-pciback: Add name prefix to global 'permissive' variable 2015-04-29 17:34:50 +01:00
xenbus xen/xenbus: Update xenbus event channel on resume 2015-05-05 18:27:13 +01:00
xenfs xen: Convert printks to pr_<level> 2013-06-28 11:19:58 -04:00
acpi.c xen / ACPI: notify xen when reduced hardware sleep is available 2013-07-31 14:22:35 +02:00
balloon.c xen/balloon: before adding hotplugged memory, set frames to invalid 2015-03-23 15:15:53 +00:00
biomerge.c
cpu_hotplug.c xen: Convert printks to pr_<level> 2013-06-28 11:19:58 -04:00
dbgp.c xen: Use dev_is_pci() to check whether it is pci device 2014-01-07 09:53:33 -05:00
efi.c efi: dmi: add support for SMBIOS 3.0 UEFI configuration table 2014-11-05 09:03:16 +01:00
evtchn.c xen/evtchn: support more than 4096 ports 2014-01-06 10:07:50 -05:00
fallback.c xen-pciback: notify hypervisor about devices intended to be assigned to guests 2013-03-22 10:20:55 -04:00
features.c
gntalloc.c xen/gntalloc: safely delete grefs in add_grefs() undo path 2014-09-04 13:14:05 +01:00
gntdev.c xen/grant: introduce func gnttab_unmap_refs_sync() 2015-04-27 11:41:12 +01:00
grant-table.c xen/grant: introduce func gnttab_unmap_refs_sync() 2015-04-27 11:41:12 +01:00
Kconfig Initial ACPI support for arm64: 2015-04-24 08:23:45 -07:00
Makefile Initial ACPI support for arm64: 2015-04-24 08:23:45 -07:00
manage.c xen: Suspend ticks on all CPUs during suspend 2015-04-29 17:10:05 +01:00
mcelog.c xen/mce: fix up xen_late_init_mcelog() error handling 2015-03-16 14:49:15 +00:00
pci.c xen/pci: Try harder to get PXM information for Xen 2015-04-15 10:57:28 +01:00
pcpu.c xen: pcpu: Use static attribute groups for sysfs entry 2015-03-16 14:49:13 +00:00
platform-pci.c drivers: xen: Mark function as static in platform-pci.c 2014-02-28 15:26:04 -05:00
preempt.c x86/xen: allow privcmd hypercalls to be preempted 2015-02-23 16:30:24 +00:00
privcmd.c xen/privcmd: improve performance of MMAPBATCH_V2 2015-03-16 14:49:15 +00:00
privcmd.h
swiotlb-xen.c xen: Add __GFP_DMA flag when xen_swiotlb_init gets free pages on ARM 2015-05-06 15:02:58 +01:00
sys-hypervisor.c xen: sysfs: fix build warning. 2012-10-19 15:17:51 -04:00
tmem.c cleancache: forbid overriding cleancache_ops 2015-04-14 16:49:03 -07:00
xen-acpi-cpuhotplug.c ACPI: Drop acpi_evaluate_hotplug_ost() and ACPI_HOTPLUG_OST 2014-02-22 00:50:49 +01:00
xen-acpi-memhotplug.c ACPICA: Resources: Provide common part for struct acpi_resource_address structures. 2015-01-26 16:09:56 +01:00
xen-acpi-pad.c ACPI / PAD / xen: use acpi_evaluate_ost() to replace open-coded version 2014-02-21 00:27:47 +01:00
xen-acpi-processor.c xen-acpi-processor: Don't display errors when we get -ENOSYS 2014-05-23 12:34:00 -04:00
xen-balloon.c xen: balloon: Use static attribute groups for sysfs entries 2015-03-16 14:49:13 +00:00
xen-scsiback.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-04-24 10:22:09 -07:00
xen-selfballoon.c drivers:xen-selfballoon:reset 'frontswap_inertia_counter' after frontswap_shrink 2014-02-28 15:26:12 -05:00
xen-stub.c xen/acpi: remove redundant acpi/acpi_drivers.h include 2013-03-11 13:53:02 -04:00
xlate_mmu.c xen/privcmd: improve performance of MMAPBATCH_V2 2015-03-16 14:49:15 +00:00