From patchwork Wed Aug 4 15:48:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 1513586 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=GTsyAksr; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4Gfzy5605gz9sRR for ; Thu, 5 Aug 2021 03:58:53 +1000 (AEST) Received: from localhost ([::1]:38818 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mBLAJ-0003vb-9L for incoming@patchwork.ozlabs.org; Wed, 04 Aug 2021 13:58:51 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48462) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBJAE-00010i-UQ for qemu-devel@nongnu.org; Wed, 04 Aug 2021 11:50:39 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:33175) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mBJA4-0006pl-2g for qemu-devel@nongnu.org; Wed, 04 Aug 2021 11:50:33 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1628092223; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uOgHoYL0xH0SByObRMXU5nsKFdTNbFLIoFBWTw4YxNM=; b=GTsyAksrpu3OW4gKAUIdaiIxv8s6sJWwpy/A4CED5vkSVWq0M1u2d2daFXHNp9z2c8RNPy b0wuiDQVRny1AvsC5SlGc7ZzsPD/45veyWggRDeQ9JzmGt0M+9cGUG7aZeWISleDepNi7n l2Bweq2A5SXPUgSQ4nYrd7Hka0E4jCQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-99-MWMeBJ6yOciJxYLMBC6aNg-1; Wed, 04 Aug 2021 11:50:22 -0400 X-MC-Unique: MWMeBJ6yOciJxYLMBC6aNg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 63623EC1AB for ; Wed, 4 Aug 2021 15:50:21 +0000 (UTC) Received: from localhost (unknown [10.39.208.3]) by smtp.corp.redhat.com (Postfix) with ESMTP id E70DE10372F3; Wed, 4 Aug 2021 15:50:03 +0000 (UTC) From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Subject: [PATCH v2 08/11] chardev: fix qemu_chr_open_fd() with fd_in==fd_out Date: Wed, 4 Aug 2021 19:48:45 +0400 Message-Id: <20210804154848.557328-9-marcandre.lureau@redhat.com> In-Reply-To: <20210804154848.557328-1-marcandre.lureau@redhat.com> References: <20210804154848.557328-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=marcandre.lureau@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.699, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , =?utf-8?q?Marc?= =?utf-8?q?-Andr=C3=A9_Lureau?= Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Marc-André Lureau The "serial" chardev calls qemu_chr_open_fd() with the same fd. This may lead to double-close as each QIOChannel owns the fd. Instead, share the reference to the same QIOChannel. Signed-off-by: Marc-André Lureau Reviewed-by: Daniel P. Berrangé --- chardev/char-fd.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/chardev/char-fd.c b/chardev/char-fd.c index c11b1037f9..93c56913b4 100644 --- a/chardev/char-fd.c +++ b/chardev/char-fd.c @@ -211,20 +211,31 @@ void qemu_chr_open_fd(Chardev *chr, int fd_in, int fd_out) { FDChardev *s = FD_CHARDEV(chr); - char *name; + g_autofree char *name = NULL; + + if (fd_out >= 0) { + qemu_set_nonblock(fd_out); + } + + if (fd_out == fd_in && fd_in >= 0) { + s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in)); + name = g_strdup_printf("chardev-file-%s", chr->label); + qio_channel_set_name(QIO_CHANNEL(s->ioc_in), name); + s->ioc_out = QIO_CHANNEL(object_ref(s->ioc_in)); + return; + } if (fd_in >= 0) { s->ioc_in = QIO_CHANNEL(qio_channel_file_new_fd(fd_in)); name = g_strdup_printf("chardev-file-in-%s", chr->label); qio_channel_set_name(QIO_CHANNEL(s->ioc_in), name); - g_free(name); } + if (fd_out >= 0) { s->ioc_out = QIO_CHANNEL(qio_channel_file_new_fd(fd_out)); + g_free(name); name = g_strdup_printf("chardev-file-out-%s", chr->label); qio_channel_set_name(QIO_CHANNEL(s->ioc_out), name); - g_free(name); - qemu_set_nonblock(fd_out); } }