From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6E15A28EE for ; Mon, 2 Jan 2023 11:28:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA444C433EF; Mon, 2 Jan 2023 11:28:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672658935; bh=5H1Ok/Poarh9aLhw8CMO1K9S/MtgNlF0gCLmX4szP68=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bUFMwpLA20t+w5u+h5gJI41QDobhE/DZOCdFkCXGUOFB7XsJjVyjNNt9RNT9SEuBQ iPB9xMnUdb8gr3NUcLPSFbVjz33OtKD6M2V1Ffp3tkzwd+VIuR6FlgNW6pxR5LreJF Js0xcXei/tvFDoy3SQ1WRKCAc8RE5adzilaX91Jo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pavel Begunkov , Jens Axboe Subject: [PATCH 6.0 55/74] io_uring: dont remove file from msg_ring reqs Date: Mon, 2 Jan 2023 12:22:28 +0100 Message-Id: <20230102110554.449273607@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230102110552.061937047@linuxfoundation.org> References: <20230102110552.061937047@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Pavel Begunkov commit ef0ec1ad03119b8b46b035dad42bca7d6da7c2e5 upstream. We should not be messing with req->file outside of core paths. Clearing it makes msg_ring non reentrant, i.e. luckily io_msg_send_fd() fails the request on failed io_double_lock_ctx() but clearly was originally intended to do retries instead. Cc: stable@vger.kernel.org Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/e5ac9edadb574fe33f6d727cb8f14ce68262a684.1670384893.git.asml.silence@gmail.com Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- io_uring/io_uring.c | 2 +- io_uring/msg_ring.c | 4 ---- io_uring/opdef.c | 7 +++++++ io_uring/opdef.h | 2 ++ 4 files changed, 10 insertions(+), 5 deletions(-) --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1607,7 +1607,7 @@ static int io_issue_sqe(struct io_kiocb return ret; /* If the op doesn't have a file, we're not polling for it */ - if ((req->ctx->flags & IORING_SETUP_IOPOLL) && req->file) + if ((req->ctx->flags & IORING_SETUP_IOPOLL) && def->iopoll_queue) io_iopoll_req_issued(req, issue_flags); return 0; --- a/io_uring/msg_ring.c +++ b/io_uring/msg_ring.c @@ -169,9 +169,5 @@ done: if (ret < 0) req_set_fail(req); io_req_set_res(req, ret, 0); - /* put file to avoid an attempt to IOPOLL the req */ - if (!(req->flags & REQ_F_FIXED_FILE)) - io_put_file(req->file); - req->file = NULL; return IOU_OK; } --- a/io_uring/opdef.c +++ b/io_uring/opdef.c @@ -63,6 +63,7 @@ const struct io_op_def io_op_defs[] = { .audit_skip = 1, .ioprio = 1, .iopoll = 1, + .iopoll_queue = 1, .async_size = sizeof(struct io_async_rw), .name = "READV", .prep = io_prep_rw, @@ -80,6 +81,7 @@ const struct io_op_def io_op_defs[] = { .audit_skip = 1, .ioprio = 1, .iopoll = 1, + .iopoll_queue = 1, .async_size = sizeof(struct io_async_rw), .name = "WRITEV", .prep = io_prep_rw, @@ -103,6 +105,7 @@ const struct io_op_def io_op_defs[] = { .audit_skip = 1, .ioprio = 1, .iopoll = 1, + .iopoll_queue = 1, .async_size = sizeof(struct io_async_rw), .name = "READ_FIXED", .prep = io_prep_rw, @@ -118,6 +121,7 @@ const struct io_op_def io_op_defs[] = { .audit_skip = 1, .ioprio = 1, .iopoll = 1, + .iopoll_queue = 1, .async_size = sizeof(struct io_async_rw), .name = "WRITE_FIXED", .prep = io_prep_rw, @@ -275,6 +279,7 @@ const struct io_op_def io_op_defs[] = { .audit_skip = 1, .ioprio = 1, .iopoll = 1, + .iopoll_queue = 1, .async_size = sizeof(struct io_async_rw), .name = "READ", .prep = io_prep_rw, @@ -290,6 +295,7 @@ const struct io_op_def io_op_defs[] = { .audit_skip = 1, .ioprio = 1, .iopoll = 1, + .iopoll_queue = 1, .async_size = sizeof(struct io_async_rw), .name = "WRITE", .prep = io_prep_rw, @@ -475,6 +481,7 @@ const struct io_op_def io_op_defs[] = { .needs_file = 1, .plug = 1, .name = "URING_CMD", + .iopoll_queue = 1, .async_size = uring_cmd_pdu_size(1), .prep = io_uring_cmd_prep, .issue = io_uring_cmd, --- a/io_uring/opdef.h +++ b/io_uring/opdef.h @@ -25,6 +25,8 @@ struct io_op_def { unsigned ioprio : 1; /* supports iopoll */ unsigned iopoll : 1; + /* have to be put into the iopoll list */ + unsigned iopoll_queue : 1; /* opcode specific path will handle ->async_data allocation if needed */ unsigned manual_alloc : 1; /* size of async data needed, if any */