From nobody Tue Feb 10 07:41:44 2026 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 ARC-Seal: i=1; a=rsa-sha256; t=1617263821; cv=none; d=zohomail.com; s=zohoarc; b=bsDF26wG7Q9/nWUxl5/vmS8FQe/4LO889jl8ZdJks4n+plm/qzfg6xUso3SCWcP8jyAazYaJbc0hUKXzARf1tEGVtez+Xo07i2S5Wo+xUs7+RN0Y9EKRAHuiTpYeYAhm8YmM2xVwhgjcLHztL3wfp9tVKH4q/7/pYt5pJoDKV58= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1617263821; h=Content-Transfer-Encoding:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=600C3dKampO8ameQEYhF1efGKNearpaXqPef51a4irY=; b=VZQpl9M7ACE6WzrFG+ouLX5mEHwiFX2Xg0jUYYsHxb2ptfPQ8vDgWia4dRX4Ft4bIbAtSCGkp1A386gTgpChM5IZT3/GozB06lb4saMMUSnLtkUq1XQX2IhCo2M0xIMChPOIMOfsevoVGONP0DvNwIK2/Ow14CWbh69Bk51VkOI= ARC-Authentication-Results: i=1; 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 1617263821092372.43750242171734; Thu, 1 Apr 2021 00:57:01 -0700 (PDT) Received: from localhost ([::1]:51646 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lRsCK-00060M-2H for importer@patchew.org; Thu, 01 Apr 2021 03:57:00 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57074) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lRs5p-0005lO-6W for qemu-devel@nongnu.org; Thu, 01 Apr 2021 03:50:17 -0400 Received: from mail.ilande.co.uk ([2001:41c9:1:41f::167]:57046 helo=mail.default.ilande.uk0.bigv.io) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lRs5m-0000z4-L5 for qemu-devel@nongnu.org; Thu, 01 Apr 2021 03:50:16 -0400 Received: from host86-148-103-9.range86-148.btcentralplus.com ([86.148.103.9] helo=kentang.home) by mail.default.ilande.uk0.bigv.io with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lRs5r-0004IO-Pe; Thu, 01 Apr 2021 08:50:24 +0100 From: Mark Cave-Ayland To: qemu-devel@nongnu.org, alxndr@bu.edu, laurent@vivier.eu, pbonzini@redhat.com Date: Thu, 1 Apr 2021 08:49:28 +0100 Message-Id: <20210401074933.9923-7-mark.cave-ayland@ilande.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210401074933.9923-1-mark.cave-ayland@ilande.co.uk> References: <20210401074933.9923-1-mark.cave-ayland@ilande.co.uk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 86.148.103.9 X-SA-Exim-Mail-From: mark.cave-ayland@ilande.co.uk Subject: [PATCH v3 06/11] esp: ensure cmdfifo is not empty and current_dev is non-NULL X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on mail.default.ilande.uk0.bigv.io) 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=2001:41c9:1:41f::167; envelope-from=mark.cave-ayland@ilande.co.uk; helo=mail.default.ilande.uk0.bigv.io X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" When about to execute a SCSI command, ensure that cmdfifo is not empty and current_dev is non-NULL. This can happen if the guest tries to execute a TI (Transfer Information) command without issuing one of the select commands first. Buglink: https://bugs.launchpad.net/qemu/+bug/1910723 Buglink: https://bugs.launchpad.net/qemu/+bug/1909247 Signed-off-by: Mark Cave-Ayland Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- hw/scsi/esp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/hw/scsi/esp.c b/hw/scsi/esp.c index 1aa2caf57d..4decbbfc29 100644 --- a/hw/scsi/esp.c +++ b/hw/scsi/esp.c @@ -284,6 +284,9 @@ static void do_busid_cmd(ESPState *s, uint8_t busid) trace_esp_do_busid_cmd(busid); lun =3D busid & 7; cmdlen =3D fifo8_num_used(&s->cmdfifo); + if (!cmdlen || !s->current_dev) { + return; + } esp_fifo_pop_buf(&s->cmdfifo, buf, cmdlen); =20 current_lun =3D scsi_device_find(&s->bus, 0, s->current_dev->id, lun); --=20 2.20.1