diff options
| -rw-r--r-- | mm/memory.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/memory.c b/mm/memory.c index 4e1c673784db..2405289dfdf8 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -910,9 +910,13 @@ int get_user_pages(struct task_struct *tsk, struct mm_struct *mm, pud = pud_offset(pgd, pg); BUG_ON(pud_none(*pud)); pmd = pmd_offset(pud, pg); - BUG_ON(pmd_none(*pmd)); + if (pmd_none(*pmd)) + return i ? : -EFAULT; pte = pte_offset_map(pmd, pg); - BUG_ON(pte_none(*pte)); + if (pte_none(*pte)) { + pte_unmap(pte); + return i ? : -EFAULT; + } if (pages) { pages[i] = pte_page(*pte); get_page(pages[i]); |