diff options
| -rw-r--r-- | arch/arm/kvm/mmu.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index ead6b16eeb09..ec14269a791c 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -200,8 +200,13 @@ static int __create_hyp_mappings(void *from, void *to, unsigned long *pfn_base) unsigned long addr, next; int err = 0; - BUG_ON(start > end); - if (start < PAGE_OFFSET) + if (start >= end) + return -EINVAL; + /* Check for a valid kernel memory mapping */ + if (!pfn_base && (!virt_addr_valid(from) || !virt_addr_valid(to - 1))) + return -EINVAL; + /* Check for a valid kernel IO mapping */ + if (pfn_base && (!is_vmalloc_addr(from) || !is_vmalloc_addr(to - 1))) return -EINVAL; mutex_lock(&kvm_hyp_pgd_mutex); |