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watch_queue: Free the alloc bitmap when the watch_queue is torn down

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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>
This commit is contained in:
David Howells 2022-03-11 13:24:29 +00:00 committed by Greg Kroah-Hartman
parent 880acbb718
commit 06ab844439
1 changed files with 1 additions and 0 deletions
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kernel/watch_queue.c
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@ -373,6 +373,7 @@ static void __put_watch_queue(struct kref *kref)
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)