[PATCH 5.16 110/121] watch_queue: Free the alloc bitmap when the watch_queue is torn down

Greg Kroah-Hartman
2022-03-14T12:33:36Z

From: David Howells <dhowells@redhat.com>

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@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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)