David Vrabel 0b80fa4b24 xen/events: don't bind non-percpu VIRQs with percpu chip ... commit 77bb3dfdc0d554befad58fdefbc41be5bc3ed38a upstream. 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> [lizf: Backported to 3.4: adjust filename] Signed-off-by: Zefan Li <lizefan@huawei.com>		2015-09-18 09:20:42 +08:00
..
xen-pciback	xen-pciback: Add name prefix to global 'permissive' variable	2015-06-19 11:40:35 +08:00
xenbus
xenfs
balloon.c
biomerge.c
cpu_hotplug.c
events.c	xen/events: don't bind non-percpu VIRQs with percpu chip	2015-09-18 09:20:42 +08:00
evtchn.c	xen/evtchn: avoid a deadlock when unbinding an event channel	2013-08-04 16:26:00 +08:00
features.c
gntalloc.c
gntdev.c	xen/gntdev: don't leak memory from IOCTL_GNTDEV_MAP_GRANT_REF	2012-11-17 13:15:54 -08:00
grant-table.c	xen-gnt: prevent adding duplicate gnt callbacks	2013-09-26 17:15:30 -07:00
Kconfig
Makefile
manage.c	xen/manage: Always freeze/thaw processes when suspend/resuming	2014-12-01 18:02:25 +08:00
pci.c
platform-pci.c
privcmd.c
privcmd.h
swiotlb-xen.c
sys-hypervisor.c
tmem.c
xen-acpi-processor.c
xen-balloon.c
xen-selfballoon.c
xencomm.c