target-ppc: fix left shift overflow in hpte_page_shift

ps->pte_enc is a 32-bit value, which is shifted left and then compared
to a 64-bit value.  It needs a cast before the shift.

Reported by Coverity.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Paolo Bonzini 2016-07-15 17:22:10 +02:00 committed by David Gibson
parent 28f3331887
commit b56d417b8d

View File

@ -478,7 +478,7 @@ static unsigned hpte_page_shift(const struct ppc_one_seg_page_size *sps,
mask = ((1ULL << ps->page_shift) - 1) & HPTE64_R_RPN;
if ((pte1 & mask) == (ps->pte_enc << HPTE64_R_RPN_SHIFT)) {
if ((pte1 & mask) == ((uint64_t)ps->pte_enc << HPTE64_R_RPN_SHIFT)) {
return ps->page_shift;
}
}