diff options
Diffstat (limited to 'arch/x86_64/mm/fault.c')
| -rw-r--r-- | arch/x86_64/mm/fault.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86_64/mm/fault.c b/arch/x86_64/mm/fault.c index e0330921676..57d3ab15a5c 100644 --- a/arch/x86_64/mm/fault.c +++ b/arch/x86_64/mm/fault.c @@ -234,6 +234,8 @@ static noinline void pgtable_bad(unsigned long address, struct pt_regs *regs, /* * Handle a fault on the vmalloc or module mapping area + * + * This assumes no large pages in there. */ static int vmalloc_fault(unsigned long address) { @@ -272,7 +274,10 @@ static int vmalloc_fault(unsigned long address) if (!pte_present(*pte_ref)) return -1; pte = pte_offset_kernel(pmd, address); - if (!pte_present(*pte) || pte_page(*pte) != pte_page(*pte_ref)) + /* Don't use pte_page here, because the mappings can point + outside mem_map, and the NUMA hash lookup cannot handle + that. */ + if (!pte_present(*pte) || pte_pfn(*pte) != pte_pfn(*pte_ref)) BUG(); __flush_tlb_all(); return 0; @@ -345,8 +350,10 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code) * (error_code & 4) == 0, and that the fault was not a * protection error (error_code & 1) == 0. */ - if (unlikely(address >= TASK_SIZE)) { - if (!(error_code & 5)) { + if (unlikely(address >= TASK_SIZE64)) { + if (!(error_code & 5) && + ((address >= VMALLOC_START && address < VMALLOC_END) || + (address >= MODULES_VADDR && address < MODULES_END))) { if (vmalloc_fault(address) < 0) goto bad_area_nosemaphore; return; |