arm64: Correctly bounds check virt_addr_valid

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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>

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Laura Abbott 2016-09-21 15:25:04 -07:00 • committed by Will Deacon

parent 0edfa83916

commit ca219452c6

1 changed files with 6 additions and 2 deletions

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arch/arm64/include/asm/memory.h

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