From b2e74db55dd93d6db22a813c9a775b5dbf87c560 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 11 Aug 2023 13:53:42 +0100 Subject: [PATCH] io_uring/net: don't overflow multishot recv Don't allow overflowing multishot recv CQEs, it might get out of hand, hurt performance, and in the worst case scenario OOM the task. Cc: stable@vger.kernel.org Fixes: b3fdea6ecb55c ("io_uring: multishot recv") Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/0b295634e8f1b71aa764c984608c22d85f88f75c.1691757663.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- io_uring/net.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/io_uring/net.c b/io_uring/net.c index 1599493..8c419c0 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -642,7 +642,7 @@ static inline bool io_recv_finish(struct io_kiocb *req, int *ret, if (!mshot_finished) { if (io_aux_cqe(req, issue_flags & IO_URING_F_COMPLETE_DEFER, - *ret, cflags | IORING_CQE_F_MORE, true)) { + *ret, cflags | IORING_CQE_F_MORE, false)) { io_recv_prep_retry(req); /* Known not-empty or unknown state, retry */ if (cflags & IORING_CQE_F_SOCK_NONEMPTY || -- 2.7.4