From patchwork Tue Dec 1 19:10:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 11943481 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75880C71155 for ; Tue, 1 Dec 2020 19:12:05 +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 9984E20639 for ; Tue, 1 Dec 2020 19:12:04 +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="Gqg5qOL8" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9984E20639 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:40368 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kkB4F-0005et-9n for qemu-devel@archiver.kernel.org; Tue, 01 Dec 2020 14:12:03 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:36938) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkB2u-0004Gx-0w for qemu-devel@nongnu.org; Tue, 01 Dec 2020 14:10:40 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:43158) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kkB2s-00019U-By for qemu-devel@nongnu.org; Tue, 01 Dec 2020 14:10:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1606849837; 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=w68SN0Vp+bNQuXrfvEy7wf2Qzh+5W/xWJwTKnBzFmBQ=; b=Gqg5qOL8pHlusLskcS56e+END5rYm2eHesY/OVTkkLX1lhELjECb04uroanAS13UebH7r1 0p30xoRzdrSQ+oL5+/SohwKvIkVuNWpv04AV1oaiXue3ZO6lNRxnGkFK48tDjm6RyYd/hG rMfIb7KCx4FJLeMNtoG/B6BxKLe1ib0= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-93-737LXkSkPpOcgscHm0pMzg-1; Tue, 01 Dec 2020 14:10:35 -0500 X-MC-Unique: 737LXkSkPpOcgscHm0pMzg-1 Received: by mail-wm1-f71.google.com with SMTP id h68so1320973wme.5 for ; Tue, 01 Dec 2020 11:10:35 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=w68SN0Vp+bNQuXrfvEy7wf2Qzh+5W/xWJwTKnBzFmBQ=; b=KEoTLRDD+drDBcDvIVL97o3e8bpLd4utq9MPzD1CnM2WXVS9XbtIhCY/bBikI46Xvy hVz36dcrB+MSzylcpTbVICsngvpjRc7UItotskluIJhx+W5fJdl5eYhiSptI2ea8k53b 4xWHqjuJYSJJOZV1HwQVHBm7Yoy1MS9AKQHKCyKquvJt0ox56VvN177o17GeKxTB6tgf Sp8gbJFLuF7pMm962JosAVI6zH1COOQSEMbk049jwu7yVXgkrE0ekrAIqBFbXU9gFach JgG0MS8ltBt2s3wFibDhTSJeExAooMGWvW+jNg/Kc3JaEm/s6HH80rTnUREsHcC0vJFz lbtA== X-Gm-Message-State: AOAM531wAi6IQFz6QHokMQ0l/FHzFRe9GZIP3JzaIO20gvPL1zBn2JR0 rCijBPoq8IFj24sGmHk/qXVfrM7K8Dpd4f1DjFRhte+TC5qbA+dU5GImeEBK++izkhh+Y2xzr8N 02pAvZDClIjsdfhskqghnmIdF/ByJ2Ay240CuZp9eicDOJ4li8alnvG65YHvc8cdI X-Received: by 2002:adf:df8e:: with SMTP id z14mr5839924wrl.406.1606849834514; Tue, 01 Dec 2020 11:10:34 -0800 (PST) X-Google-Smtp-Source: ABdhPJw3iMHfFgwziKzD2zjWfuGvRt9Y4QxOFvGVGN8ZlxdU6xeGluloQfXdaWj7jRudSKXaHjLd0w== X-Received: by 2002:adf:df8e:: with SMTP id z14mr5839887wrl.406.1606849834241; Tue, 01 Dec 2020 11:10:34 -0800 (PST) Received: from localhost.localdomain (111.red-88-21-205.staticip.rima-tde.net. [88.21.205.111]) by smtp.gmail.com with ESMTPSA id h15sm816446wrw.15.2020.12.01.11.10.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Dec 2020 11:10:33 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 1/4] tests/qtest/fuzz-test: Quit test_lp1878642 once done Date: Tue, 1 Dec 2020 20:10:23 +0100 Message-Id: <20201201191026.4149955-2-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201201191026.4149955-1-philmd@redhat.com> References: <20201201191026.4149955-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.497, 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_H3=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: Laurent Vivier , Fam Zheng , Thomas Huth , qemu-block@nongnu.org, Li Qiang , Hannes Reinecke , Alexander Bulekov , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Missed in fd250172842 ("qtest: add a reproducer for LP#1878642"). Reviewed-by: Thomas Huth Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Li Qiang --- tests/qtest/fuzz-test.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tests/qtest/fuzz-test.c b/tests/qtest/fuzz-test.c index 9cb4c42bdea..87b72307a5b 100644 --- a/tests/qtest/fuzz-test.c +++ b/tests/qtest/fuzz-test.c @@ -45,6 +45,7 @@ static void test_lp1878642_pci_bus_get_irq_level_assert(void) qtest_outl(s, 0xcf8, 0x8400f841); qtest_outl(s, 0xcfc, 0xebed205d); qtest_outl(s, 0x5d02, 0xebed205d); + qtest_quit(s); } int main(int argc, char **argv) From patchwork Tue Dec 1 19:10:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 11943485 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1DAD8C71155 for ; Tue, 1 Dec 2020 19:13:43 +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 5DE932168B for ; Tue, 1 Dec 2020 19:13:42 +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="bK0YI9eT" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5DE932168B 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:46662 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kkB5p-0008GR-4W for qemu-devel@archiver.kernel.org; Tue, 01 Dec 2020 14:13:41 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:37016) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kkB32-0004MD-JJ for qemu-devel@nongnu.org; Tue, 01 Dec 2020 14:10:48 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:27212) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1kkB2x-00019z-VK for qemu-devel@nongnu.org; Tue, 01 Dec 2020 14:10:48 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1606849843; 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=IjqfFE4wAjPA6W+4g0HRWJuF/SKb/AgR1wTwW244iqE=; b=bK0YI9eTetImOiLEueI/tYdcZ8vNygNqus2lBS9G8XCWjtw8xbAe6XFv21rsFbsRCibLnZ zebznyIvQkjYnJqt/edL0viSNFygOsa7h1brq5i0QgYvfwb56+/a/dnmX8gf35vMqI6f0r 2Mg5VtcfKK6nq5SNePxMH0PzojQWx54= Received: from mail-wr1-f69.google.com (mail-wr1-f69.google.com [209.85.221.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-348-PEQVjSgvPauF7gxAstC0iA-1; Tue, 01 Dec 2020 14:10:40 -0500 X-MC-Unique: PEQVjSgvPauF7gxAstC0iA-1 Received: by mail-wr1-f69.google.com with SMTP id b1so1416053wrc.14 for ; Tue, 01 Dec 2020 11:10:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=IjqfFE4wAjPA6W+4g0HRWJuF/SKb/AgR1wTwW244iqE=; b=gigKvrMp2awHPFfYYfv03JlslhZ9MTQzbmcPFowu9Q1Ka54PyY8SvgcD1CpKlKbU1T vE07hah8Mq/kVp9nLY70M/oVFEm9LHqbMdahNL3Tfy6oBgiuxKRnQqDQQ1ZZP+SEqQb0 C2Rar/Z00HP74lnSpO5mmKqkVvjoos91II3ppO/BJQHSp1R6rbKvCm1kyQEAxaBstjAe lIqAi9Y5nsO9vCUM6r7EkpeHpJFvE9iPCqX/tdItHUuKJcTzI7ySGPGDilxQ9ITQm5kl y9deIwSiM0vOe8WNSrtAsugnisk62M6hlFWDNvv4TcBeP4F36T7nhrDoVwXTwG6uRQwK duWg== X-Gm-Message-State: AOAM531Q5cvubV+LofgSzcA2EH0g+k2QZ2nfGRf89NwAAgRYe4QOyYOf +f6nL4NbLzVOHCHW+OoR0EtTYJcLVVV+mt1mC4zYCvWRTF+CDSbUhwsvYkymmVTK2LkvUKYIWDI QzTEE/DXN7+TZVrV3DCmP0OwjqYXgVV0ouWBifwa3WipBzQ3kSEnSy0xMsaUZw5By X-Received: by 2002:a7b:cd90:: with SMTP id y16mr4219513wmj.115.1606849839415; Tue, 01 Dec 2020 11:10:39 -0800 (PST) X-Google-Smtp-Source: ABdhPJwYV+xBkY4QniZVOYMWFPWaKiS9tJyJbhljO0KUVTIejeKa9QDyJkFA4gfoElhZ5XaWqqJ4ew== X-Received: by 2002:a7b:cd90:: with SMTP id y16mr4219481wmj.115.1606849839168; Tue, 01 Dec 2020 11:10:39 -0800 (PST) Received: from localhost.localdomain (111.red-88-21-205.staticip.rima-tde.net. [88.21.205.111]) by smtp.gmail.com with ESMTPSA id d2sm814662wrn.43.2020.12.01.11.10.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Dec 2020 11:10:38 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 2/4] hw/scsi/megasas: Assert cdb_len is valid in megasas_handle_scsi() Date: Tue, 1 Dec 2020 20:10:24 +0100 Message-Id: <20201201191026.4149955-3-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201201191026.4149955-1-philmd@redhat.com> References: <20201201191026.4149955-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.497, 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_H4=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: Laurent Vivier , Fam Zheng , Thomas Huth , qemu-block@nongnu.org, Li Qiang , Hannes Reinecke , Alexander Bulekov , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Daniele Buono Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" cdb_len can not be zero... (or less than 6) here, else we have a out-of-bound read first in scsi_cdb_length(): 71 int scsi_cdb_length(uint8_t *buf) 72 { 73 int cdb_len; 74 75 switch (buf[0] >> 5) { 76 case 0: 77 cdb_len = 6; 78 break; Then another out-of-bound read when the size returned by scsi_cdb_length() is used. Figured out after reviewing: https://www.mail-archive.com/qemu-devel@nongnu.org/msg757937.html And reproduced fuzzing: qemu-fuzz-i386: hw/scsi/megasas.c:1679: int megasas_handle_scsi(MegasasState *, MegasasCmd *, int): Assertion `len > 0 && cdb_len >= len' failed. ==1689590== ERROR: libFuzzer: deadly signal #8 0x7f7a5d918e75 in __assert_fail (/lib64/libc.so.6+0x34e75) #9 0x55a1b95cf6d4 in megasas_handle_scsi hw/scsi/megasas.c:1679:5 #10 0x55a1b95cf6d4 in megasas_handle_frame hw/scsi/megasas.c:1975:24 #11 0x55a1b95cf6d4 in megasas_mmio_write hw/scsi/megasas.c:2132:9 #12 0x55a1b981972e in memory_region_write_accessor softmmu/memory.c:491:5 #13 0x55a1b981972e in access_with_adjusted_size softmmu/memory.c:552:18 #14 0x55a1b981972e in memory_region_dispatch_write softmmu/memory.c:1501:16 #15 0x55a1b97f0ab0 in flatview_write_continue softmmu/physmem.c:2759:23 #16 0x55a1b97ec3f2 in flatview_write softmmu/physmem.c:2799:14 #17 0x55a1b97ec3f2 in address_space_write softmmu/physmem.c:2891:18 #18 0x55a1b985c7cd in cpu_outw softmmu/ioport.c:70:5 #19 0x55a1b99577ac in qtest_process_command softmmu/qtest.c:481:13 Inspired-by: Daniele Buono Inspired-by: Alexander Bulekov Signed-off-by: Philippe Mathieu-Daudé --- hw/scsi/megasas.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index 1a5fc5857db..f5ad4425b5b 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -1667,6 +1667,7 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd, { uint8_t *cdb; int target_id, lun_id, cdb_len; + int len = -1; bool is_write; struct SCSIDevice *sdev = NULL; bool is_logical = (frame_cmd == MFI_CMD_LD_SCSI_IO); @@ -1676,6 +1677,10 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd, lun_id = cmd->frame->header.lun_id; cdb_len = cmd->frame->header.cdb_len; + if (cdb_len > 0) { + len = scsi_cdb_length(cdb); + } + assert(len > 0 && cdb_len >= len); if (is_logical) { if (target_id >= MFI_MAX_LD || lun_id != 0) { trace_megasas_scsi_target_not_present( From patchwork Tue Dec 1 19:10:25 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 11943483 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1CB7C64E7B for ; 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[88.21.205.111]) by smtp.gmail.com with ESMTPSA id p4sm808598wrm.51.2020.12.01.11.10.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Dec 2020 11:10:43 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 3/4] tests/qtest/fuzz-test: Add test_megasas_cdb_len_zero() reproducer Date: Tue, 1 Dec 2020 20:10:25 +0100 Message-Id: <20201201191026.4149955-4-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201201191026.4149955-1-philmd@redhat.com> References: <20201201191026.4149955-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.497, 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_H3=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: Laurent Vivier , Fam Zheng , Thomas Huth , qemu-block@nongnu.org, Li Qiang , Hannes Reinecke , Alexander Bulekov , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add a reproducer which triggers (without the previous patch): $ make check-qtest-x86_64 Running test qtest-x86_64/fuzz-test qemu-system-x86_64: hw/scsi/megasas.c:1679: megasas_handle_scsi: Assertion `cdb_len > 0 && scsi_cdb_length(cdb) <= cdb_len' failed. tests/qtest/libqtest.c:181: kill_qemu() detected QEMU death from signal 6 (Aborted) (core dumped) ERROR qtest-x86_64/fuzz-test - too few tests run (expected 1, got 0) Signed-off-by: Alexander Bulekov Signed-off-by: Philippe Mathieu-Daudé Acked-by: Thomas Huth --- tests/qtest/fuzz-test.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tests/qtest/fuzz-test.c b/tests/qtest/fuzz-test.c index 87b72307a5b..31f90cfb4fc 100644 --- a/tests/qtest/fuzz-test.c +++ b/tests/qtest/fuzz-test.c @@ -48,6 +48,23 @@ static void test_lp1878642_pci_bus_get_irq_level_assert(void) qtest_quit(s); } +static void test_megasas_cdb_len_zero(void) +{ + QTestState *s; + + s = qtest_init("-M pc -nodefaults " + "-device megasas-gen2 -device scsi-cd,drive=null0 " + "-blockdev driver=null-co,read-zeroes=on,node-name=null0"); + + qtest_outl(s, 0xcf8, 0x80001011); + qtest_outb(s, 0xcfc, 0xbb); + qtest_outl(s, 0xcf8, 0x80001002); + qtest_outl(s, 0xcfc, 0xf3ff2966); + qtest_writeb(s, 0x4600, 0x03); + qtest_outw(s, 0xbb40, 0x460b); + qtest_quit(s); +} + int main(int argc, char **argv) { const char *arch = qtest_get_arch(); @@ -59,6 +76,8 @@ int main(int argc, char **argv) test_lp1878263_megasas_zero_iov_cnt); qtest_add_func("fuzz/test_lp1878642_pci_bus_get_irq_level_assert", test_lp1878642_pci_bus_get_irq_level_assert); + qtest_add_func("fuzz/test_megasas_cdb_len_zero", + test_megasas_cdb_len_zero); } return g_test_run(); From patchwork Tue Dec 1 19:10:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= X-Patchwork-Id: 11943487 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D96E2C64E7B for ; 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[88.21.205.111]) by smtp.gmail.com with ESMTPSA id d13sm885463wrb.39.2020.12.01.11.10.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Dec 2020 11:10:48 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [RFC PATCH v2 4/4] hw/scsi/megasas: Have incorrect cdb return MFI_STAT_ABORT_NOT_POSSIBLE Date: Tue, 1 Dec 2020 20:10:26 +0100 Message-Id: <20201201191026.4149955-5-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201201191026.4149955-1-philmd@redhat.com> References: <20201201191026.4149955-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=philmd@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.497, 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_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: Laurent Vivier , Fam Zheng , Thomas Huth , qemu-block@nongnu.org, Li Qiang , Hannes Reinecke , Alexander Bulekov , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Avoid out-of-bound array access with invalid CDB is provided. Signed-off-by: Philippe Mathieu-Daudé --- RFC because no clue how hardware works --- hw/scsi/megasas.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c index f5ad4425b5b..7e7cbb8854b 100644 --- a/hw/scsi/megasas.c +++ b/hw/scsi/megasas.c @@ -1680,7 +1680,15 @@ static int megasas_handle_scsi(MegasasState *s, MegasasCmd *cmd, if (cdb_len > 0) { len = scsi_cdb_length(cdb); } - assert(len > 0 && cdb_len >= len); + if (len < 0 || len < cdb_len) { + trace_megasas_scsi_invalid_cdb_len(mfi_frame_desc(frame_cmd), + is_logical, target_id, + lun_id, cdb_len); + megasas_write_sense(cmd, SENSE_CODE(INVALID_FIELD)); + cmd->frame->header.scsi_status = TASK_ABORTED; + s->event_count++; + return MFI_STAT_ABORT_NOT_POSSIBLE; + } if (is_logical) { if (target_id >= MFI_MAX_LD || lun_id != 0) { trace_megasas_scsi_target_not_present(