On 15.10.19 20:18, Julien Grall wrote:
virt_to_maddr() is using the hardware page-table walk instructions to
translate a virtual address to physical address. The function should
only be called on virtual address mapped.
_end points past the end of Xen binary and may not be mapped when the
binary size is page-aligned. This means virt_to_maddr() will not be able
to do the translation and therefore crash Xen.
Note there is also an off-by-one issue in this code, but the panic will
trump that.
Both issues can be fixed by using _end - 1 in the check.
Signed-off-by: Julien Grall <julien.gr...@arm.com>
With or without the cast suggested by Stefano:
Release-acked-by: Juergen Gross <jgr...@suse.com>
Juergen
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