[PATCH 5.10 63/71] watch_queue: Free the alloc bitmap when the watch_queue is torn down

[Greg Kroah-Hartman]

From: David Howells <dhowells@xxxxxxxxxx>

commit 7ea1a0124b6da246b5bc8c66cddaafd36acf3ecb upstream.

Free the watch_queue note allocation bitmap when the watch_queue is
destroyed.

Fixes: c73be61cede5 ("pipe: Add general notification queue support")
Reported-by: Jann Horn <jannh@xxxxxxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 kernel/watch_queue.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/watch_queue.c
+++ b/kernel/watch_queue.c
@@ -373,6 +373,7 @@ static void __put_watch_queue(struct kre
 
 	for (i = 0; i < wqueue->nr_pages; i++)
 		__free_page(wqueue->notes[i]);
+	bitmap_free(wqueue->notes_bitmap);
 
 	wfilter = rcu_access_pointer(wqueue->filter);
 	if (wfilter)