From 7b53d59859bc932b37895d2d37388e7fa29af7a5 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Sat, 30 May 2020 14:19:15 +0300 Subject: [PATCH] io_uring: fix overflowed reqs cancellation Overflowed requests in io_uring_cancel_files() should be shed only of inflight and overflowed refs. All other left references are owned by someone else. If refcount_sub_and_test() fails, it will go further and put put extra ref, don't do that. Also, don't need to do io_wq_cancel_work() for overflowed reqs, they will be let go shortly anyway. Signed-off-by: Pavel Begunkov Signed-off-by: Jens Axboe --- fs/io_uring.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/io_uring.c b/fs/io_uring.c index 9f11feb8a3ac..732ec73ec3c0 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -7449,10 +7449,11 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx, finish_wait(&ctx->inflight_wait, &wait); continue; } + } else { + io_wq_cancel_work(ctx->io_wq, &cancel_req->work); + io_put_req(cancel_req); } - io_wq_cancel_work(ctx->io_wq, &cancel_req->work); - io_put_req(cancel_req); schedule(); finish_wait(&ctx->inflight_wait, &wait); }