From mboxrd@z Thu Jan 1 00:00:00 1970 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 0B5AC4DAF85; Thu, 17 Sep 2026 15:53:07 +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=1789660388; cv=none; b=ItmxXxf35aEOeR2s94CVGT5qZmDlVKKJRWnTUA0mdkQd/SmrmJJTHIQhNKGB1fYiimvgj/z/YePIKySX+pocr/LfZZhBWuqhvLONJt1BI76yLDW3APSxPka76MRl8a+Lj1/lx084lDFW6Mmo6Z6Wo1b5APJqy27eC7/miotxKRE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789660388; c=relaxed/simple; bh=Go/JfwXP4ymwmHOFxaK5pR9Uv8yjYqdMb5LNsPJAVng=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ea/ZrNZSCLdYxtJ/1wa67tJhhlZKZk3YjLjv36xw8fgZ3d1EK6AN2LIS6t7E7lgE6SIy/elCWlqWZzTlbbvvORAt9pTmpOF+iyrVs6f+TdUdM42QqtdpQ3Ay/nFdoNPhFPINHMvd+kaMDP+2ueFpWWwuDfpbg9vIwK6nUcxxzpI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rLWOZ3Ah; 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="rLWOZ3Ah" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A0F61F000FF; Thu, 17 Sep 2026 15:53:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789660386; bh=InsYiR7Nrvut5jOdWM8dGyD8Nm2BZbgsllLW+QGRJjQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=rLWOZ3AhCAxcVrml4oPRvrzvIEPapmwi3HCc5QvdbQGL1+b3CTwUEDj0tQoNFyhCc IZAZJ88K5c8lREQCL7aNGsxVNyQvF6V/w8l4mqfQUlHImjYpC+QeNSSyBrft2Zf/Da s4XYhhCIwgAZNBPLITrFxz1zyTD0oKZnFUlVsVyM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gabriel Krisman Bertazi , Jens Axboe Subject: [PATCH 7.2 538/733] io_uring/net: let io_recv_buf_select return the length of the buffer region Date: Thu, 17 Sep 2026 16:14:06 +0100 Message-ID: <20260917151405.627340786@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151350.597953846@linuxfoundation.org> References: <20260917151350.597953846@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 7.2-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 @@ -1139,6 +1139,7 @@ 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; /* @@ -1184,13 +1185,14 @@ 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, sr->buf_group, issue_flags); if (!sel->addr) @@ -1204,7 +1206,7 @@ map_ubuf: return ret; } - return 0; + return len; } int io_recv(struct io_kiocb *req, unsigned int issue_flags)