linux-apfs

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Christoffer Dall 2cccbb368a KVM: arm64: vgic-its: Plug race in vgic_put_irq

Right now the following sequence of events can happen:

  1. Thread X calls vgic_put_irq
  2. Thread Y calls vgic_add_lpi
  3. Thread Y gets lpi_list_lock
  4. Thread X drops the ref count to 0 and blocks on lpi_list_lock
  5. Thread Y finds the irq via the lpi_list_lock, raises the ref
     count to 1, and release the lpi_list_lock.
  6. Thread X proceeds and frees the irq.

Avoid this by holding the spinlock around the kref_put.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

2016-08-10 11:41:54 +02:00

vgic-init.c

Merge tag 'kvm-arm-for-4.8-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2016-08-04 13:59:56 +02:00

vgic-irqfd.c

KVM: arm: vgic-irqfd: Workaround changing kvm_set_routing_entry prototype

2016-07-24 10:37:38 +01:00

vgic-its.c

KVM: arm64: vgic-its: Handle errors from vgic_add_lpi

2016-08-10 11:41:35 +02:00

vgic-kvm-device.c

KVM: arm64: vgic-its: Enable ITS emulation as a virtual MSI controller