Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 36E3A4B44CF; Thu, 17 Sep 2026 18:52:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789671164; cv=none; b=BJdku+E1BsXBqS7fzwO8Qls8rYBpNMeGGaevlv+OWiGQe3AEfvjuj2HJfLPrG0nh0XklYr7gFzNk9wihwNhFcHUK/DfdXg9AMalJjyHYeGvIRy1oAzpFv/RVFMoa9xvnyco93QYR680hI9YD0JWlMU0lJ6GPB2JVsxhHtCnKXbI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789671164; c=relaxed/simple; bh=ORwi2dF438fIqWLuuRUd5/AONVhnRxTfy4+JX8HXuIc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lQowcGvssMbGM1k40rISesmjW2VB1qv2bdNr+AyKPoi5R6KMMHJGnAYDdXxCL+xUJgHI3XgJZnNnxI095F2qbn5O3npHU5wES5mw4WaD5/TjSeV1SQhDCIrrZ0e+VslqJlTOFT1sxgFKvrQgj2PYMutlwSffwuE5G4IKOcqdKMM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DobQpio2; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DobQpio2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E8401F000FF; Thu, 17 Sep 2026 18:52:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789671162; bh=Z/cphjMy+rB8aTLPHkSHiVOH2u9AxbIyPhoZnL4ufRY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=DobQpio23+K2/7phKDmeZeZUMDcoytESoJJ5o81Gns30nhTwyNjJ2Sd+az6/etkhd 4UG1X7KybfyvAs9pE9aOcftv0hezl68NWucxFAZ94DVC9/ZqMlSvWs9F3Ra9cKcp6R V55Idp/mXOna3W6cxtj/pot8ouGN/pZkybJLPY8w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gabriel Krisman Bertazi , Jens Axboe Subject: [PATCH 6.12 0838/1102] io_uring/net: let io_recv_buf_select return the length of the buffer region Date: Thu, 17 Sep 2026 16:13:01 +0100 Message-ID: <20260917151601.557473303@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151539.408551884@linuxfoundation.org> References: <20260917151539.408551884@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Gabriel Krisman Bertazi commit dcbd1c054848848a1937ca0768ce2bdbc31ae621 upstream. In preparation to using this field as an upper limit to truncation, return the size of the allocated region. Fixes: ae98dbf43d75 ("io_uring/kbuf: add support for incremental buffer consumption") Cc: stable@vger.kernel.org Signed-off-by: Gabriel Krisman Bertazi Link: https://patch.msgid.link/20260902230041.1320658-2-krisman@suse.de Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- io_uring/net.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/io_uring/net.c +++ b/io_uring/net.c @@ -1104,6 +1104,7 @@ static int io_recv_buf_select(struct io_ struct io_br_sel *sel, unsigned int issue_flags) { struct io_sr_msg *sr = io_kiocb_to_cmd(req, struct io_sr_msg); + size_t len; int ret; /* @@ -1145,13 +1146,14 @@ static int io_recv_buf_select(struct io_ /* special case 1 vec, can be a fast path */ if (ret == 1) { sr->buf = arg.iovs[0].iov_base; - sr->len = arg.iovs[0].iov_len; + len = sr->len = arg.iovs[0].iov_len; goto map_ubuf; } iov_iter_init(&kmsg->msg.msg_iter, ITER_DEST, arg.iovs, ret, - arg.out_len); + arg.out_len); + len = arg.out_len; } else { - size_t len = sel->val; + len = sel->val; *sel = io_buffer_select(req, &len, issue_flags); if (!sel->addr) @@ -1165,7 +1167,7 @@ map_ubuf: return ret; } - return 0; + return len; } int io_recv(struct io_kiocb *req, unsigned int issue_flags)