From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.openvz.org (unknown [69.168.225.77]) by lore.virtuozzo.com (Postfix) with ESMTPS id 23A4380478 for ; Thu, 1 Oct 2026 03:25:17 +0000 (UTC) Received: from mail.openvz.org (localhost [127.0.0.1]) by mail.openvz.org (8.14.4/8.14.4) with ESMTP id 6913O0sd030172; Thu, 1 Oct 2026 06:24:01 +0300 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.openvz.org 6913O0sd030172 Authentication-Results: mail.openvz.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=virtuozzo.com header.i=@virtuozzo.com header.b="XyRhx1y4" Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by mail.openvz.org (8.14.4/8.14.4) with ESMTP id 6913Nx8Y030164 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=FAIL) for ; Thu, 1 Oct 2026 06:23:59 +0300 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.openvz.org 6913Nx8Y030164 Received: by mail-wm1-f70.google.com with SMTP id 5b1f17b1804b1-49e7631c43aso56568875e9.3 for ; Wed, 30 Sep 2026 20:23:59 -0700 (PDT) X-Gm-Message-State: AFuF++l64gIbkox5rlrS60WljO5EsjYNkkxvjjr0S5AnDZE6pX0KLaNt vLq+N26G9rT/x0LqhpK2PfO2wVakjPs9ydcY7zaj4bUSDPUCoEZ8FZxRjSTjdnBCSJPtsjL0t4b vVZCjrhjDZEEFk8CyRIbjpcF9DETm7r7N+5hS6PWcRA3IpXEcYbsjXg== X-Gm-Gg: AYBFou2dsqcbQA0IU49foVP3vNHZFoCDT6fFZnvhziqhrbxXsYEvC1YHihYEmTL0jTY W9AVzuSzEZuSu2/yDiLCf1Fd5wzY407KdM7ZSdq9Fk9DCQXVbZ0BG0qBBfRBoNR5OwcJuffvmVW GumMSVcI2l/RNQk31madBV3ipQ4w9xp9WiEzy7qipGStx2WAnlIz1xzU1ptGmxPKrBpzwiBxS84 WVa9Ey4nb4LNLuUL523BrbXOWyRaEIogKLdR8xNKZxdFuAihGGpJkuI0GX8GFyjzHbdRWMhI9+M uv9/kyof4cABCtQTpl2wznh+6vJ59wW10BHyMMn9GSW6pjnC6HIj1Iek83CR2RqHjkaFTf6jlXP Nt4jCGLiLYY1pjjs= X-Received: by 2002:a05:600c:4fc5:b0:4a0:ca3:15a2 with SMTP id 5b1f17b1804b1-4a01b00c138mr55509435e9.20.1790825039196; Wed, 30 Sep 2026 20:23:59 -0700 (PDT) X-Received: by 2002:a05:600c:4fc5:b0:4a0:ca3:15a2 with SMTP id 5b1f17b1804b1-4a01b00c138mr55509255e9.20.1790825038756; Wed, 30 Sep 2026 20:23:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1790825038; cv=none; d=google.com; s=arc-20260327; b=a/hdc/SOIwQW2NkUI07U6dQ5ydooMpWe8xNQV5fiSeQvPIb1AHafME5fxArYXF7qB+ L8UoeKmdSeptmNU8rgPNVlUS1aCJKoRT4kjW265vJHv/dWhIlXFAQBcNb95e3/u9Bfrp in4YP23ZuMijbkqRi9UjMeKOInp174TQgXaJmo0gZ7s3NAxuoumD7JoNYl0xcgH/xyQT GyNrh4YEh+0utG/P4tAqQ/RdD6HpKFVwhp2PF0tK3ICsXqO7frnkq1mmB92yp/YvSpmn cgtqjX4o+CNGinDzQD4pGJU3I2JF2Aq6s/IOXiJEpjYyNV8HDEcoaJo6PwkdYVboh5eb B37g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20260327; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:dkim-signature; bh=UgvNVqPbJzNxVZEuk1QqIwuiJyOUm6ZKOv2Io9agaPI=; fh=6JpqpGxFeFNaDh+k4t2UfZyo3rKe/54dyQ52T8vVmSc=; b=dfn55kobubEf6lA6ndd6nzdN9lzncHSM2EIQnl1eYon8OZySZK2489i7+5ebZM8nmr 5f3rgpuajF1d8kP4dfNK1dSmfVYf+IXIRQr0VwTRPiq6I5kRqnGF1Cx/4MkzAMTa9Yd8 V/wh+30Y8q9LovFbIuLL/6IT3e3auqdjh7boW8V6+AmquU809x5ipAOfuRh23gkbdYF5 RmGDCbOvfZ0SqEuQhocG0YpGPv/4iuVOOIXiaI29dLqHjl3SiOgl9p2gFyUFfAilzGj2 v0xUinLWpWdLr5ETxDIoBUUqESrHISfTeXxCFcEJLLJxW65TndcfqtayqHn0B6jp2oV7 vjLA==; dara=google.com ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@virtuozzo.com header.s=relay header.b=XyRhx1y4; spf=pass (google.com: domain of kui.liu@virtuozzo.com designates 130.117.225.111 as permitted sender) smtp.mailfrom=kui.liu@virtuozzo.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=virtuozzo.com Received: from relay.virtuozzo.com (relay.virtuozzo.com. [130.117.225.111]) by mx.google.com with ESMTPS id ffacd0b85a97d-48b06b30a55si2597864f8f.310.2026.09.30.20.23.58 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2026 20:23:58 -0700 (PDT) Received-SPF: pass (google.com: domain of kui.liu@virtuozzo.com designates 130.117.225.111 as permitted sender) client-ip=130.117.225.111; Authentication-Results: mx.google.com; dkim=pass header.i=@virtuozzo.com header.s=relay header.b=XyRhx1y4; spf=pass (google.com: domain of kui.liu@virtuozzo.com designates 130.117.225.111 as permitted sender) smtp.mailfrom=kui.liu@virtuozzo.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=virtuozzo.com DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=virtuozzo.com; s=relay; h=Message-Id:Content-Type:MIME-Version:Subject:Date :From; bh=UgvNVqPbJzNxVZEuk1QqIwuiJyOUm6ZKOv2Io9agaPI=; b=XyRhx1y4LEqM2ZaMz5q Z28kXOzdTQKhnO8ivxg8+DwYb3yLpDOz1rh/plFhTNguO3j/tl4WV9LH2NL44Pu5haWZ2Z9E0N2yA ws9Txv1IY2Bk5C7WAcqeHotWA5IPDyT1Q0bL1MstwrlOtxc/1i7j8ocnKB1i63OEzpe7Dpk0BKyM9 g7x28YjNxxpY3fc0z7/UzXjfl9wRy1MOTPZ7rUqvUxC7hxRl4MN1COO+BtD+7qMWfLO5hgux6o0G+ tPNujb1cqSzJTl5UPfsVl0Nbx6u5llTUbH2VFkcVOKMcU91X2PdEVn6/kNLGqoeigj15IxgFDJImp dgmxlI7FFAL2vTg==; Received: from ch-vpn.virtuozzo.com ([130.117.225.6] helo=LK-MBP.local) by relay.virtuozzo.com with esmtp (Exim 4.96) (envelope-from ) id 1xC7Lh-003Ya3-1l; Thu, 01 Oct 2026 05:23:56 +0200 From: Liu Kui Date: Thu, 01 Oct 2026 11:23:41 +0800 MIME-Version: 1.0 Message-Id: <20261001-sockio-sendmsg-empty-iter-v1-1-b876f4fbb9c7@virtuozzo.com> References: <20261001-sockio-sendmsg-empty-iter-v1-0-b876f4fbb9c7@virtuozzo.com> In-Reply-To: <20261001-sockio-sendmsg-empty-iter-v1-0-b876f4fbb9c7@virtuozzo.com> To: Konstantin Khorenko X-Mailer: b4 0.16.0 X-OZ-Fwd: true Cc: azaitsev@virtuozzo.com, devel@openvz.org, Liu Kui Subject: [Devel] [PATCH hci-8.1 1/2] fs/fuse kio: don't spin on an empty iter in do_sockio_sendmsg() X-BeenThere: devel@openvz.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: OpenVZ development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: devel-bounces@openvz.org Errors-To: devel-bounces@openvz.org If msg->get_iter() ever returns an empty iterator, do_sockio_sendmsg() spins forever. Restore the old do_send_one_seg() behavior: warn and fail the msg. https://virtuozzo.atlassian.net/browse/VSTOR-142167 Fixes: 32b44dc7ba67 ("fs/fuse kio: refactor transmit path in pcs_sockio_send()") Signed-off-by: Liu Kui --- fs/fuse/kio/pcs/pcs_sock_io.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/fs/fuse/kio/pcs/pcs_sock_io.c b/fs/fuse/kio/pcs/pcs_sock_io.c index 2da6d51c898b..b4a2ceeb331c 100644 --- a/fs/fuse/kio/pcs/pcs_sock_io.c +++ b/fs/fuse/kio/pcs/pcs_sock_io.c @@ -307,6 +307,11 @@ static int do_sockio_sendmsg(struct pcs_sockio *sio, struct pcs_msg *msg) if (!iov_iter_count(it)) { /* Current iter is exhausted, init new one */ msg->get_iter(msg, sio->write_offset, it, WRITE); + /* An empty iter here would spin this loop forever */ + if (WARN_ON(!iov_iter_count(it))) { + clear_and_wake_up_bit(PCS_MSG_BUSY, &msg->flags); + return -PCS_ERR_NET_ABORT; + } } BUG_ON(iov_iter_count(it) > left); -- Git-155) _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel