From patchwork Tue Dec 3 13:40:00 2024 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: 13892454 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 274D7E64A9E for ; Tue, 3 Dec 2024 13:40:56 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tIT8Z-0006KF-6W; Tue, 03 Dec 2024 08:40:23 -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 1tIT8W-0006Jc-J2 for qemu-devel@nongnu.org; Tue, 03 Dec 2024 08:40:20 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tIT8V-0001zg-4T for qemu-devel@nongnu.org; Tue, 03 Dec 2024 08:40:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1733233218; 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=jHr9cJGY/ijRGteW+inaktRfgMyPYsPeEycO3v4GR60=; b=G08oyW9GylcUqg1Q7bRZlH2x3fchvrb6vHgxIr7JKtgdZzC6hNMwml61Va4DpC88y0WiVp rd0YN+TE1J4SW/inMien/yKb4dl35WATqxe7UD52+hE9ec2p3WeZJ00d4IwZKB60CaLyAH 8rka1BEMt596laXiGxIfxS8p1QYT4+s= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-577-vZixn3tUPBSjUMysRInwSA-1; Tue, 03 Dec 2024 08:40:13 -0500 X-MC-Unique: vZixn3tUPBSjUMysRInwSA-1 X-Mimecast-MFC-AGG-ID: vZixn3tUPBSjUMysRInwSA Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D491A1955D4A; Tue, 3 Dec 2024 13:40:12 +0000 (UTC) Received: from localhost (unknown [10.39.208.11]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 7B4ED30000DF; Tue, 3 Dec 2024 13:40:11 +0000 (UTC) From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Nicholas Piggin Subject: [PULL 1/2] chardev: Fix record/replay error path NULL deref in device creation Date: Tue, 3 Dec 2024 17:40:00 +0400 Message-ID: <20241203134001.750958-2-marcandre.lureau@redhat.com> In-Reply-To: <20241203134001.750958-1-marcandre.lureau@redhat.com> References: <20241203134001.750958-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Received-SPF: pass client-ip=170.10.129.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -50 X-Spam_score: -5.1 X-Spam_bar: ----- X-Spam_report: (-5.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.996, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Nicholas Piggin qemu_chardev_set_replay() was being called in chardev creation to set up replay parameters even if the chardev is NULL. A segfault can be reproduced by specifying '-serial chardev:bad' with an rr=record mode. Fix this with a NULL pointer check. Reported-by: Peter Maydell Resolves: Coverity CID 1559470 Fixes: 4c193bb129dae ("chardev: set record/replay on the base device of a muxed device") Signed-off-by: Nicholas Piggin Reviewed-by: Marc-André Lureau Reviewed-by: Peter Maydell Message-ID: <20240828043337.14587-2-npiggin@gmail.com> --- chardev/char.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/chardev/char.c b/chardev/char.c index a1722aa076..1c7f6c711a 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -726,7 +726,7 @@ static Chardev *__qemu_chr_new(const char *label, const char *filename, if (strstart(filename, "chardev:", &p)) { chr = qemu_chr_find(p); - if (replay) { + if (replay && chr) { qemu_chardev_set_replay(chr, &err); if (err) { error_report_err(err);