diff options
| -rw-r--r-- | arch/arm/mm/fault.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index bc0e1d8..8799eae 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -266,7 +266,9 @@ good_area: return fault; check_stack: - if (vma->vm_flags & VM_GROWSDOWN && !expand_stack(vma, addr)) + /* Don't allow expansion below FIRST_USER_ADDRESS */ + if (vma->vm_flags & VM_GROWSDOWN && + addr >= FIRST_USER_ADDRESS && !expand_stack(vma, addr)) goto good_area; out: return fault; |