tree b2b7de70e9429cf33bbe50698dbbdfa25362fe2e
parent 0edfa8391664a4f795c67d0e07480fbe801a0e1d
author Laura Abbott <labbott@redhat.com> 1474496704 -0700
committer Will Deacon <will.deacon@arm.com> 1474535842 +0100

arm64: Correctly bounds check virt_addr_valid

virt_addr_valid is supposed to return true if and only if virt_to_page
returns a valid page structure. The current macro does math on whatever
address is given and passes that to pfn_valid to verify. vmalloc and
module addresses can happen to generate a pfn that 'happens' to be
valid. Fix this by only performing the pfn_valid check on addresses that
have the potential to be valid.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>