diff options
| author | Fam Zheng <famz@redhat.com> | 2015-03-16 17:03:37 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-04-27 18:24:18 +0200 |
| commit | e95205e1f9cd2c4262b7a7b1c992a94512c86d0e (patch) | |
| tree | 1c03e53eeb46e2d7c15b9c15a1f1c9414e254e6e /qemu-options.hx | |
| parent | 33b6c2edf6214f02b9beaea61b169506c01f90aa (diff) | |
dma-helpers: Fix race condition of continue_after_map_failure and dma_aio_cancel
If DMA's owning thread cancels the IO while the bounce buffer's owning thread
is notifying the "cpu client list", a use-after-free happens:
continue_after_map_failure dma_aio_cancel
------------------------------------------------------------------
aio_bh_new
qemu_bh_delete
qemu_bh_schedule (use after free)
Also, the old code doesn't run the bh in the right AioContext.
Fix both problems by passing a QEMUBH to cpu_register_map_client.
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1426496617-10702-6-git-send-email-famz@redhat.com>
[Remove unnecessary forward declaration. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'qemu-options.hx')
0 files changed, 0 insertions, 0 deletions