Messages in this thread | | | From | Jim Mattson <> | Date | Thu, 15 Apr 2021 14:50:07 -0700 | Subject | Re: [PATCH 1/3] KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU |
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On Mon, Apr 12, 2021 at 3:21 PM Sean Christopherson <seanjc@google.com> wrote: > > If allocating a new instance of an I/O bus fails when unregistering a > device, wait to destroy the device until after all readers are guaranteed > to see the new null bus. Destroying devices before the bus is nullified > could lead to use-after-free since readers expect the devices on their > reference of the bus to remain valid. > > Fixes: f65886606c2d ("KVM: fix memory leak in kvm_io_bus_unregister_dev()") > Cc: stable@vger.kernel.org > Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Jim Mattson <jmattson@google.com>
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