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David Matlack authored
vm_get_max_gfn() casts vm->max_gfn from a uint64_t to an unsigned int, which causes the upper 32-bits of the max_gfn to get truncated. Nobody noticed until now likely because vm_get_max_gfn() is only used as a mechanism to create a memslot in an unused region of the guest physical address space (the top), and the top of the 32-bit physical address space was always good enough. This fix reveals a bug in memslot_modification_stress_test which was trying to create a dummy memslot past the end of guest physical memory. Fix that by moving the dummy memslot lower. Fixes: 52200d0d ("KVM: selftests: Remove duplicate guest mode handling") Reviewed-by:
Venkatesh Srinivas <venkateshs@chromium.org> Signed-off-by:
David Matlack <dmatlack@google.com> Message-Id: <20210521173828.1180619-1-dmatlack@google.com> Reviewed-by:
Andrew Jones <drjones@redhat.com> Reviewed-by:
Peter Xu <peterx@redhat.com> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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