[Bug 1538049] Re: xenstore crashes with SIGBUS in domain_can_read()

[Stefan Bader]

For the recent crashes the pointer seemed always consistent with
previous mappings. Wondering whether the mapping might be invalidated by
the hypervisor side. For additional information, when I start the domU,
grant table debug shows the following at the beginning:

(XEN) grant-table for remote domain:    1 (v1)
(XEN) [  0]        0 0x212992 0x00000002          0 0x212992 0x19
(XEN) [  1]        0 0x212991 0x00000002          0 0x212991 0x19
(XEN) [  8]        0 0x1d26b7 0x00000001          0 0x1d26b7 0x19

when xenstored crashes, the middle entry goes away. But its impossible
to say whether it goes away before the crash or just as a result of it.

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Title:
  xenstore crashes with SIGBUS in domain_can_read()

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