From patchwork Thu Sep 24 09:22:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 11796783 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E82EE139A for ; Thu, 24 Sep 2020 09:44:51 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 937FF23787 for ; Thu, 24 Sep 2020 09:44:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="aJKDaCn1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 937FF23787 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:46066 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kLNo2-0005Kl-HI for patchwork-qemu-devel@patchwork.kernel.org; Thu, 24 Sep 2020 05:44:50 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38820) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kLNTh-0000rA-6e for qemu-devel@nongnu.org; Thu, 24 Sep 2020 05:23:49 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:43444) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kLNTb-000621-FN for qemu-devel@nongnu.org; Thu, 24 Sep 2020 05:23:48 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1600939422; 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=Tkn5x3SmRtENeyRythGpocLhfNHWHtH02D7imFP+YWY=; b=aJKDaCn1uHKT+h4B0MKIWkJo9k2oArzQaTP3iF80+9k3NmRU+KCIvHxgNZbVAx4/NP+Bli NJbVhsNXv7UFzOpJ3TONU8V7tFGKengmbNqDN+IDEFz+bpdxbJkb6yyfU7GSABod3m/A10 yniAAF/QmZOvtD1ivLiduhjB9+8aoM8= 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-155-m-odfh08NKyljNAixjn31g-1; Thu, 24 Sep 2020 05:23:38 -0400 X-MC-Unique: m-odfh08NKyljNAixjn31g-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 8E257800475; Thu, 24 Sep 2020 09:23:37 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2B17473662; Thu, 24 Sep 2020 09:23:37 +0000 (UTC) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 27/92] hw: megasas: consider 'iov_count=0' is an error in megasas_map_sgl Date: Thu, 24 Sep 2020 05:22:09 -0400 Message-Id: <20200924092314.1722645-28-pbonzini@redhat.com> In-Reply-To: <20200924092314.1722645-1-pbonzini@redhat.com> References: <20200924092314.1722645-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/22 23:02:20 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.228, 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_H5=0.001, RCVD_IN_MSPIKE_WL=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: Alexander Bulekov , Li Qiang Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Li Qiang Currently in 'megasas_map_sgl' when 'iov_count=0' will just return success however the 'cmd' doens't contain any iov. This will cause the assert in 'scsi_dma_complete' failed. This is because in 'dma_blk_cb' the 'dbs->sg_cur_index == dbs->sg->nsg' will be true and just call 'dma_complete'. However now there is no aiocb returned. This fixes the LP#1878263: -->https://bugs.launchpad.net/qemu/+bug/1878263 Reported-by: Alexander Bulekov Signed-off-by: Li Qiang Message-Id: <20200815141940.44025-3-liq3ea@163.com> Signed-off-by: Paolo Bonzini --- hw/scsi/megasas.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index 4cc709d2c6..e24c12d7ee 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -277,7 +277,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl) cmd->flags = le16_to_cpu(cmd->frame->header.flags); iov_count = cmd->frame->header.sge_count; - if (iov_count > MEGASAS_MAX_SGE) { + if (!iov_count || iov_count > MEGASAS_MAX_SGE) { trace_megasas_iovec_sgl_overflow(cmd->index, iov_count, MEGASAS_MAX_SGE); return -1;