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Diffstat (limited to 'kernel/futex.c')
-rw-r--r--kernel/futex.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index c2b2e0b83abf..b9b8aea5389e 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -297,7 +297,7 @@ static int futex_handle_fault(unsigned long address, int attempt)
297 struct vm_area_struct * vma; 297 struct vm_area_struct * vma;
298 struct mm_struct *mm = current->mm; 298 struct mm_struct *mm = current->mm;
299 299
300 if (attempt >= 2 || !(vma = find_vma(mm, address)) || 300 if (attempt > 2 || !(vma = find_vma(mm, address)) ||
301 vma->vm_start > address || !(vma->vm_flags & VM_WRITE)) 301 vma->vm_start > address || !(vma->vm_flags & VM_WRITE))
302 return -EFAULT; 302 return -EFAULT;
303 303
@@ -397,7 +397,7 @@ static struct task_struct * futex_find_get_task(pid_t pid)
397 p = NULL; 397 p = NULL;
398 goto out_unlock; 398 goto out_unlock;
399 } 399 }
400 if (p->state == EXIT_ZOMBIE || p->exit_state == EXIT_ZOMBIE) { 400 if (p->exit_state != 0) {
401 p = NULL; 401 p = NULL;
402 goto out_unlock; 402 goto out_unlock;
403 } 403 }
@@ -747,8 +747,10 @@ retry:
747 */ 747 */
748 if (attempt++) { 748 if (attempt++) {
749 if (futex_handle_fault((unsigned long)uaddr2, 749 if (futex_handle_fault((unsigned long)uaddr2,
750 attempt)) 750 attempt)) {
751 ret = -EFAULT;
751 goto out; 752 goto out;
753 }
752 goto retry; 754 goto retry;
753 } 755 }
754 756
@@ -1322,9 +1324,10 @@ static int do_futex_lock_pi(u32 __user *uaddr, int detect, int trylock,
1322 * still holding the mmap_sem. 1324 * still holding the mmap_sem.
1323 */ 1325 */
1324 if (attempt++) { 1326 if (attempt++) {
1325 if (futex_handle_fault((unsigned long)uaddr, attempt)) 1327 if (futex_handle_fault((unsigned long)uaddr, attempt)) {
1328 ret = -EFAULT;
1326 goto out_unlock_release_sem; 1329 goto out_unlock_release_sem;
1327 1330 }
1328 goto retry_locked; 1331 goto retry_locked;
1329 } 1332 }
1330 1333
@@ -1506,9 +1509,10 @@ pi_faulted:
1506 * still holding the mmap_sem. 1509 * still holding the mmap_sem.
1507 */ 1510 */
1508 if (attempt++) { 1511 if (attempt++) {
1509 if (futex_handle_fault((unsigned long)uaddr, attempt)) 1512 if (futex_handle_fault((unsigned long)uaddr, attempt)) {
1513 ret = -EFAULT;
1510 goto out_unlock; 1514 goto out_unlock;
1511 1515 }
1512 goto retry_locked; 1516 goto retry_locked;
1513 } 1517 }
1514 1518