diff options
| -rw-r--r-- | arch/x86/mm/pti.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/mm/pti.c b/arch/x86/mm/pti.c index 71fba17c9d7c..79217868dd13 100644 --- a/arch/x86/mm/pti.c +++ b/arch/x86/mm/pti.c @@ -297,6 +297,10 @@ pti_clone_pmds(unsigned long start, unsigned long end, pmdval_t clear) p4d_t *p4d; pud_t *pud; + /* Overflow check */ + if (addr < start) + break; + pgd = pgd_offset_k(addr); if (WARN_ON(pgd_none(*pgd))) return; |