linux/arch
Sheng Yang ba4cef31d5 KVM: Fix racy in kvm_free_assigned_irq
In the past, kvm_get_kvm() and kvm_put_kvm() was called in assigned device irq
handler and interrupt_work, in order to prevent cancel_work_sync() in
kvm_free_assigned_irq got a illegal state when waiting for interrupt_work done.
But it's tricky and still got two problems:

1. A bug ignored two conditions that cancel_work_sync() would return true result
in a additional kvm_put_kvm().

2. If interrupt type is MSI, we would got a window between cancel_work_sync()
and free_irq(), which interrupt would be injected again...

This patch discard the reference count used for irq handler and interrupt_work,
and ensure the legal state by moving the free function at the very beginning of
kvm_destroy_vm(). And the patch fix the second bug by disable irq before
cancel_work_sync(), which may result in nested disable of irq but OK for we are
going to free it.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2009-02-15 02:47:36 +02:00
..
alpha alpha: fixup BUG macro 2009-02-05 12:56:49 -08:00
arm [ARM] Storage class should be before const qualifier 2009-02-10 09:59:19 +00:00
avr32 eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
blackfin Blackfin arch: Remove outdated code 2009-02-04 16:49:45 +08:00
cris Merge branch 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2009-01-14 19:58:40 -08:00
frv FRV: in_interrupt() requires #inclusion of linux/hardirq.h not asm/hardirq.h now 2009-02-09 08:51:35 -08:00
h8300 Merge branch 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2009-01-14 19:58:40 -08:00
ia64 KVM: Add kvm_arch_sync_events to sync with asynchronize events 2009-02-15 02:47:36 +02:00
m32r eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
m68k m68knommu: remove the no longer used PCI support option 2009-01-27 16:42:02 +10:00
m68knommu m68knommu: fix 5329 ColdFire periphal addressing 2009-01-27 16:42:03 +10:00
mips x86: spinlocks: define dummy __raw_spin_is_contended 2009-02-09 08:15:39 -08:00
mn10300 [CVE-2009-0029] Rename old_readdir to sys_old_readdir 2009-01-14 14:15:15 +01:00
parisc Documentation: move DMA-mapping.txt to Doc/PCI/ 2009-01-29 18:19:29 -08:00
powerpc KVM: Add kvm_arch_sync_events to sync with asynchronize events 2009-02-15 02:47:36 +02:00
s390 KVM: Add kvm_arch_sync_events to sync with asynchronize events 2009-02-15 02:47:36 +02:00
sh sh: Fix up T-bit error handling in SH-4A mutex fastpath. 2009-01-29 11:56:03 +09:00
sparc sparc64: Fix probe_kernel_{read,write}(). 2009-02-08 22:32:31 -08:00
um mm: invoke oom-killer from page fault 2009-01-06 15:58:58 -08:00
x86 KVM: Fix racy in kvm_free_assigned_irq 2009-02-15 02:47:36 +02:00
xtensa byteorder: make swab.h include asm/swab.h like a regular header 2009-01-14 19:56:50 -08:00
.gitignore
Kconfig [CVE-2009-0029] System call wrapper infrastructure 2009-01-14 14:15:16 +01:00