If it passes addr=0x202920000,size=0xfe00 to unmap_stage2_range-> ...->unmap_stage2_ptes, unmap_stage2_ptes will get addr=0x202920000, end=0x20292fe00. After first while loop addr=0x202930000, end=0x20292fe00, then addr!=end. Thus it will touch another pages by put_pages() in the 2nd loop. This patch fixes it by hardening the break condition of while loop. Signed-off-by: jia.he@xxxxxxxxxxxxxxxx --- v2: newly added virt/kvm/arm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index 8dac311..45cd040 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -217,7 +217,7 @@ static void unmap_stage2_ptes(struct kvm *kvm, pmd_t *pmd, put_page(virt_to_page(pte)); } - } while (pte++, addr += PAGE_SIZE, addr != end); + } while (pte++, addr += PAGE_SIZE, addr < end); if (stage2_pte_table_empty(start_pte)) clear_stage2_pmd_entry(kvm, pmd, start_addr); -- 1.8.3.1 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
