Gratian Crisan reported that vmalloc_fault() crashes when CONFIG_HUGETLBFS is not set since the function inadvertently uses pXn_huge(), which always return 0 in this case. ioremap() does not depend on CONFIG_HUGETLBFS.
Fix vmalloc_fault() to call pXd_large() instead.
fixes: f4eafd8bcd52 ("x86/mm: Fix vmalloc_fault() to handle large pages properly") Reported-by: Gratian Crisan gratian.crisan@ni.com Signed-off-by: Toshi Kani toshi.kani@hpe.com Cc: Thomas Gleixner tglx@linutronix.de Cc: Ingo Molnar mingo@redhat.com Cc: "H. Peter Anvin" hpa@zytor.com Cc: Borislav Petkov bp@alien8.de Cc: Andy Lutomirski luto@kernel.org Cc: Gratian Crisan gratian.crisan@ni.com Cc: stable@vger.kernel.org --- arch/x86/mm/fault.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index c88573d90f3e..25a30b5d6582 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -330,7 +330,7 @@ static noinline int vmalloc_fault(unsigned long address) if (!pmd_k) return -1;
- if (pmd_huge(*pmd_k)) + if (pmd_large(*pmd_k)) return 0;
pte_k = pte_offset_kernel(pmd_k, address); @@ -475,7 +475,7 @@ static noinline int vmalloc_fault(unsigned long address) if (pud_none(*pud) || pud_pfn(*pud) != pud_pfn(*pud_ref)) BUG();
- if (pud_huge(*pud)) + if (pud_large(*pud)) return 0;
pmd = pmd_offset(pud, address); @@ -486,7 +486,7 @@ static noinline int vmalloc_fault(unsigned long address) if (pmd_none(*pmd) || pmd_pfn(*pmd) != pmd_pfn(*pmd_ref)) BUG();
- if (pmd_huge(*pmd)) + if (pmd_large(*pmd)) return 0;
pte_ref = pte_offset_kernel(pmd_ref, address);