The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 1bfed23349716a7811645336a7ce42c4b8f250bc # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '2023090926-basics-violet-94a6@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: 1bfed2334971 ("io_uring/net: don't overflow multishot accept") d86eaed185e9 ("io_uring: cleanup io_aux_cqe() API") ea97f6c8558e ("io_uring: add support for multishot timeouts") a282967c848f ("io_uring: encapsulate task_work state") 13bfa6f15d0b ("io_uring: remove extra tw trylocks") 9d2789ac9d60 ("block/io_uring: pass in issue_flags for uring_cmd task_work handling") 6bb30855560e ("io_uring: if a linked request has REQ_F_FORCE_ASYNC then run it async") f58680085478 ("io_uring: add reschedule point to handle_tw_list()") 50470fc5723a ("io_uring: return normal tw run linking optimisation") 31f084b7b028 ("io_uring: simplify fallback execution") b0b7a7d24b66 ("io_uring: return back links tw run optimisation") c3f4d39ee4bc ("io_uring: optimise deferred tw execution") 360173ab9e1a ("io_uring: move io_run_local_work_locked") 3e5655552a82 ("io_uring: mark io_run_local_work static") 2f413956cc8a ("io_uring: don't set TASK_RUNNING in local tw runner") 140102ae9a9f ("io_uring: move defer tw task checks") 1414d6298584 ("io_uring: kill io_run_task_work_ctx") f36ba6cf1ab6 ("io_uring: don't iterate cq wait fast path") 0c4fe008c9cb ("io_uring: rearrange defer list checks") 6e5aedb9324a ("io_uring/poll: attempt request issue after racy poll wakeup") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1bfed23349716a7811645336a7ce42c4b8f250bc Mon Sep 17 00:00:00 2001 From: Pavel Begunkov <asml.silence@xxxxxxxxx> Date: Fri, 11 Aug 2023 13:53:41 +0100 Subject: [PATCH] io_uring/net: don't overflow multishot accept Don't allow overflowing multishot accept CQEs, we want to limit the grows of the overflow list. Cc: stable@xxxxxxxxxxxxxxx Fixes: 4e86a2c980137 ("io_uring: implement multishot mode for accept") Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> Link: https://lore.kernel.org/r/7d0d749649244873772623dd7747966f516fe6e2.1691757663.git.asml.silence@xxxxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> diff --git a/io_uring/net.c b/io_uring/net.c index eb1f51ddcb23..1599493544a5 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -1367,7 +1367,7 @@ int io_accept(struct io_kiocb *req, unsigned int issue_flags) if (ret < 0) return ret; if (io_aux_cqe(req, issue_flags & IO_URING_F_COMPLETE_DEFER, ret, - IORING_CQE_F_MORE, true)) + IORING_CQE_F_MORE, false)) goto retry; return -ECANCELED;
