Alex Williamson
e314672a8a
vhost: Fix size of dirty log sync on resize
When the vhost log is resized, we want to sync up to the size of the old log. With that end address in place, ignore regions that start after then end rather than hitting assert. This also addresses the following crash report: When migrating a vm using vhost-net we hit the following assertion: qemu-kvm: /usr/src/packages/BUILD/qemu-kvm-0.15.1/hw/vhost.c:30: vhost_dev_sync_region: Assertion `start / (0x1000 * (8 * sizeof(vhost_log_chunk_t))) < dev->log_size' failed. The cases which the end < start check is intended to catch, such as for vga video memory, will also likely trigger the assertion. Reorder the code to handle this correctly. Reported-by: Josh Durgin <josh.durgin@dreamhost.com> Signed-off-by: Bruce Rogers <brogers@suse.com> Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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