Messages in this thread Patch in this message | | | From | Anirudh Rayabharam <> | Subject | [PATCH] watch_queue: free the notes array | Date | Sun, 27 Mar 2022 21:19:33 +0530 |
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__put_watch_queue() frees the individual notifications but doesn't free the notes array itself causing a memory leak.
Reported by syzbot at: https://syzkaller.appspot.com/bug?extid=25ea042ae28f3888727a
Fix by adding a kfree().
Fixes: c73be61cede5 ("pipe: Add general notification queue support") Reported-by: syzbot+25ea042ae28f3888727a@syzkaller.appspotmail.com Tested-by: syzbot+25ea042ae28f3888727a@syzkaller.appspotmail.com Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com> --- kernel/watch_queue.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/kernel/watch_queue.c b/kernel/watch_queue.c index 3990e4df3d7b..230038d4f908 100644 --- a/kernel/watch_queue.c +++ b/kernel/watch_queue.c @@ -370,6 +370,7 @@ static void __put_watch_queue(struct kref *kref) for (i = 0; i < wqueue->nr_pages; i++) __free_page(wqueue->notes[i]); + kfree(wqueue->notes); bitmap_free(wqueue->notes_bitmap); wfilter = rcu_access_pointer(wqueue->filter); -- 2.35.1
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