diff options
-rw-r--r-- | mm/filemap.c | 13 |
1 files changed, 2 insertions, 11 deletions
diff --git a/mm/filemap.c b/mm/filemap.c index 9940895f734c..188cf5fd3e8d 100644 --- a/mm/filemap.c +++ b/mm/filemap.c | |||
@@ -1300,7 +1300,7 @@ int filemap_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |||
1300 | 1300 | ||
1301 | size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | 1301 | size = (i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; |
1302 | if (vmf->pgoff >= size) | 1302 | if (vmf->pgoff >= size) |
1303 | goto outside_data_content; | 1303 | return VM_FAULT_SIGBUS; |
1304 | 1304 | ||
1305 | /* If we don't want any read-ahead, don't bother */ | 1305 | /* If we don't want any read-ahead, don't bother */ |
1306 | if (VM_RandomReadHint(vma)) | 1306 | if (VM_RandomReadHint(vma)) |
@@ -1377,7 +1377,7 @@ retry_find: | |||
1377 | if (unlikely(vmf->pgoff >= size)) { | 1377 | if (unlikely(vmf->pgoff >= size)) { |
1378 | unlock_page(page); | 1378 | unlock_page(page); |
1379 | page_cache_release(page); | 1379 | page_cache_release(page); |
1380 | goto outside_data_content; | 1380 | return VM_FAULT_SIGBUS; |
1381 | } | 1381 | } |
1382 | 1382 | ||
1383 | /* | 1383 | /* |
@@ -1388,15 +1388,6 @@ retry_find: | |||
1388 | vmf->page = page; | 1388 | vmf->page = page; |
1389 | return ret | VM_FAULT_LOCKED; | 1389 | return ret | VM_FAULT_LOCKED; |
1390 | 1390 | ||
1391 | outside_data_content: | ||
1392 | /* | ||
1393 | * An external ptracer can access pages that normally aren't | ||
1394 | * accessible.. | ||
1395 | */ | ||
1396 | if (vma->vm_mm == current->mm) | ||
1397 | return VM_FAULT_SIGBUS; | ||
1398 | |||
1399 | /* Fall through to the non-read-ahead case */ | ||
1400 | no_cached_page: | 1391 | no_cached_page: |
1401 | /* | 1392 | /* |
1402 | * We're only likely to ever get here if MADV_RANDOM is in | 1393 | * We're only likely to ever get here if MADV_RANDOM is in |