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Index: linux-2.6.18.8/fs/dnotify.c
===================================================================
--- linux-2.6.18.8.orig/fs/dnotify.c
+++ linux-2.6.18.8/fs/dnotify.c
@@ -67,6 +67,9 @@ int fcntl_dirnotify(int fd, struct file
struct dnotify_struct **prev;
struct inode *inode;
fl_owner_t id = current->files;
+#ifndef __GENKSYMS__
+ struct file *f;
+#endif
int error = 0;
if ((arg & ~DN_MULTISHOT) == 0) {
@@ -93,8 +96,13 @@ int fcntl_dirnotify(int fd, struct file
prev = &odn->dn_next;
}
+ rcu_read_lock();
+ f = fcheck(fd);
+ rcu_read_unlock();
/* we'd lost the race with close(), sod off silently */
- if (fcheck(fd) != filp)
+ /* note that inode->i_lock prevents reordering problems
+ * between accesses to descriptor table and ->i_dnotify */
+ if (f != filp)
goto out_free;
error = f_setown(filp, current->pid, 0);
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