From nobody Tue Nov 26 11:30:15 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1708552246511629.6517005653876; Wed, 21 Feb 2024 13:50:46 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rcuRG-0000sy-GG; Wed, 21 Feb 2024 16:47:38 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcuRF-0000ox-0R; Wed, 21 Feb 2024 16:47:37 -0500 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rcuRD-0007LQ-71; Wed, 21 Feb 2024 16:47:36 -0500 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id 44E694F861; Thu, 22 Feb 2024 00:47:46 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id E0545869E2; Thu, 22 Feb 2024 00:47:23 +0300 (MSK) Received: (nullmailer pid 2339838 invoked by uid 1000); Wed, 21 Feb 2024 21:47:23 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Peter Maydell , Bohdan Kostiv , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Richard Henderson , Michael Tokarev Subject: [Stable-7.2.10 05/33] system/vl.c: Fix handling of '-serial none -serial something' Date: Thu, 22 Feb 2024 00:46:48 +0300 Message-Id: <20240221214723.2339742-5-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1708552247004100001 From: Peter Maydell Currently if the user passes multiple -serial options on the command line, we mostly treat those as applying to the different serial devices in order, so that for example -serial stdio -serial file:filename will connect the first serial port to stdio and the second to the named file. The exception to this is the '-serial none' serial device type. This means "don't allocate this serial device", but a bug means that following -serial options are not correctly handled, so that -serial none -serial stdio has the unexpected effect that stdio is connected to the first serial port, not the second. This is a very long-standing bug that dates back at least as far as commit 998bbd74b9d81 from 2009. Make the 'none' serial type move forward in the indexing of serial devices like all the other serial types, so that any subsequent -serial options are correctly handled. Note that if your commandline mistakenly had a '-serial none' that was being overridden by a following '-serial something' option, you should delete the unnecessary '-serial none'. This will give you the same behaviour as before, on QEMU versions both with and without this bug fix. Cc: qemu-stable@nongnu.org Reported-by: Bohdan Kostiv Signed-off-by: Peter Maydell Reviewed-by: Daniel P. Berrang=C3=A9 Reviewed-by: Richard Henderson Message-id: 20240122163607.459769-2-peter.maydell@linaro.org Fixes: 998bbd74b9d81 ("default devices: core code & serial lines") Signed-off-by: Peter Maydell (cherry picked from commit d2019a9d0c34a4fdcb5b5df550d73040dc0637d9) Signed-off-by: Michael Tokarev diff --git a/softmmu/vl.c b/softmmu/vl.c index ce88869618..ab4394c53d 100644 --- a/softmmu/vl.c +++ b/softmmu/vl.c @@ -1363,18 +1363,22 @@ static void qemu_create_default_devices(void) static int serial_parse(const char *devname) { int index =3D num_serial_hds; - char label[32]; =20 - if (strcmp(devname, "none") =3D=3D 0) - return 0; - snprintf(label, sizeof(label), "serial%d", index); serial_hds =3D g_renew(Chardev *, serial_hds, index + 1); =20 - serial_hds[index] =3D qemu_chr_new_mux_mon(label, devname, NULL); - if (!serial_hds[index]) { - error_report("could not connect serial device" - " to character backend '%s'", devname); - return -1; + if (strcmp(devname, "none") =3D=3D 0) { + /* Don't allocate a serial device for this index */ + serial_hds[index] =3D NULL; + } else { + char label[32]; + snprintf(label, sizeof(label), "serial%d", index); + + serial_hds[index] =3D qemu_chr_new_mux_mon(label, devname, NULL); + if (!serial_hds[index]) { + error_report("could not connect serial device" + " to character backend '%s'", devname); + return -1; + } } num_serial_hds++; return 0; --=20 2.39.2