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[NET]: Fix race when opening a proc file while a network namespace is exiting.
[firefly-linux-kernel-4.4.55.git]
/
fs
/
buffer.c
diff --git
a/fs/buffer.c
b/fs/buffer.c
index 02ebb1f1d3b0e2fa70298d21dbb1b88d4471a65d..0e5ec371ce727e8fcccd79d33108b9aca1f051ca 100644
(file)
--- a/
fs/buffer.c
+++ b/
fs/buffer.c
@@
-2221,7
+2221,7
@@
block_page_mkwrite(struct vm_area_struct *vma, struct page *page,
lock_page(page);
size = i_size_read(inode);
if ((page->mapping != inode->i_mapping) ||
- (
(page->index << PAGE_CACHE_SHIFT
) > size)) {
+ (
page_offset(page
) > size)) {
/* page got truncated out from underneath us */
goto out_unlock;
}