From nobody Mon Sep 16 18:53:15 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=1721809975; cv=none; d=zohomail.com; s=zohoarc; b=eVNtS5vpg0rHNizYCwU5MTwj8hzAS24YJsICKlA3iAZLClXq2vo/n+4fM7s+ouK/qxgCtzVvgJoKyR7bbwaXrEEJwQkIddnFC4uB0A2rtmJXzEinXM1gz2MK8CYUXSeeqVP1mS6qtVL/amqpOYQmjtTipIbij6WX6q8+/utUyA0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1721809975; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=6zBMcgZOuGC9Zq1HFFB8Kq14HtY83XxOhr2ghiK5Hz0=; b=du8jb9DT/vr8tlA1lnYVCksBtijafBSa1YSXxURi6RfS15n1SYy7fjwWJkMZ9jmNOqGgmjhtJ82EyXg51ibayahN/kRUlFC9YXE9Cruu2TXFTr+H1YnDlyWyLO+ew5DU0Gw4LOIFg+g3X8inoFhn/pGx1qIS191T8o3U9zNrVBM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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 1721809975601301.4247512765419; Wed, 24 Jul 2024 01:32:55 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sWXPX-0005Lv-FH; Wed, 24 Jul 2024 04:31:47 -0400 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 1sWXPV-0005JQ-5n for qemu-devel@nongnu.org; Wed, 24 Jul 2024 04:31:45 -0400 Received: from mail-pl1-x634.google.com ([2607:f8b0:4864:20::634]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sWXPT-0004zo-0J for qemu-devel@nongnu.org; Wed, 24 Jul 2024 04:31:44 -0400 Received: by mail-pl1-x634.google.com with SMTP id d9443c01a7336-1fd90c2fc68so13868085ad.1 for ; Wed, 24 Jul 2024 01:31:42 -0700 (PDT) Received: from atishp.ba.rivosinc.com ([64.71.180.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fd6f3181bdsm88455845ad.133.2024.07.24.01.31.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jul 2024 01:31:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rivosinc-com.20230601.gappssmtp.com; s=20230601; t=1721809901; x=1722414701; darn=nongnu.org; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=6zBMcgZOuGC9Zq1HFFB8Kq14HtY83XxOhr2ghiK5Hz0=; b=03mhbXUAMbXiXH7VGYfcgDzGNR0atkWFA7mKgQ+4aKbO9fsyerCV2M1Wd4orUs6ida 5QT5IGPAXwlerbwSAt88pv5DV8zVmB1k/LswG8qlbNx0Uy1z0ZXfj8yRPIO99fasV0iR FII05mweF/HjsKuUt6rYermBs1QYE/kaD1NJOlUEY6IHWfVtZbcVQ9OYXw8l8N4qH1es rkbNOk9HwAL2fTQEdL0GpHJp7HUZXZXvif+hdWbZVGTGrBBFCflI9jIKNUGuu5FqxJib NK8nTrnUYG1BAuJ/9pyORXDUy5hCIVCE29zNYjI0rSm/c4qd3W4XeBg52W+Vui3AyBO7 HZ9g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721809901; x=1722414701; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=6zBMcgZOuGC9Zq1HFFB8Kq14HtY83XxOhr2ghiK5Hz0=; b=J34c8Besw5BEx9NamV9pm32W+dr3QZTfba4sMe0W783yeuh1TJkfaDgkNa8u997R3v xci5Y53FkPg3+KjeCrTQkF56ii5YR7t94IrzCP64irbMfIH9jyMOrLYw1TPEPj1B6FnC tvLos1yD8vdRCHApl37g3eDvzyJMGtMWn7PB3ztNorkCUsEUNdk2SO9smLsRa7I4SdlD F6WPTvRwUYKtWIYfgsIdKLgtxRtFWNJxCe8AJpbW8cLn3sY092n3X6QXo1CbAqwckJfY NJ7kexhIMfdDyR25fuNHX3NrOPmPdgyI10jHrMoMiJZBir3uwpRl5xgIs2zhW+ke1wtI fhLg== X-Forwarded-Encrypted: i=1; AJvYcCXqJGll62XxsgBpFtFz0Jyx5z15RoqjPdMFw8lz6JmF0SRIt5zX5V66ECVwy3Xvu0OIB4MOtFvwvfJkE10wXMhvqA/JZh8= X-Gm-Message-State: AOJu0YztDfg4UOdAqiQIORI4hKlf88e7R8dOE7rzo1aaG2V934E0vd7i zwmYxaIhgyE0oqmwex99Yp3W8Cf3xQEkyNgt53v0lFXfDh+wzxtf92kjnPAvg9U= X-Google-Smtp-Source: AGHT+IFJvG5mp9zK5yIlMwW5DUiHSHhgxFOvaRZv+2wbdtiX45bYpRgA0fjkVWIpTuwh68jyjV6cNQ== X-Received: by 2002:a17:902:dacb:b0:1fd:d4c2:a2ef with SMTP id d9443c01a7336-1fdd5512f0emr10667275ad.21.1721809901200; Wed, 24 Jul 2024 01:31:41 -0700 (PDT) From: Atish Patra Date: Wed, 24 Jul 2024 01:31:36 -0700 Subject: [PATCH] target/riscv: Add asserts for out-of-bound access MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240724-fixes-v1-1-4a64596b0d64@rivosinc.com> X-B4-Tracking: v=1; b=H4sIAOe7oGYC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIxMDcyNj3bTMitRiXRNjyyRLI8uktKRkCyWg2oKiVLAEUGl0bG0tAOMVHYN XAAAA To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org Cc: palmer@dabbelt.com, liwei1518@gmail.com, zhiwei_liu@linux.alibaba.com, bin.meng@windriver.com, dbarboza@ventanamicro.com, alistair.francis@wdc.com, Peter Maydell , Atish Patra X-Mailer: b4 0.15-dev-13183 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=2607:f8b0:4864:20::634; envelope-from=atishp@rivosinc.com; helo=mail-pl1-x634.google.com 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @rivosinc-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1721809978202116600 Coverity complained about the possible out-of-bounds access with counter_virt/counter_virt_prev because these two arrays are accessed with privilege mode. However, these two arrays are accessed only when virt is enabled. Thus, the privilege mode can't be M mode. Add the asserts anyways to detect any wrong usage of these arrays in the future. Suggested-by: Peter Maydell Signed-off-by: Atish Patra Reviewed-by: Alistair Francis --- The lore discussion can be found here https://lore.kernel.org/all/CAHBxVyGQHBobpf71o4Qp51iQGXKBh0Ajup=3De_a95xdLF= =3D=3DV_WQ@mail.gmail.com/ --- target/riscv/pmu.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/riscv/pmu.c b/target/riscv/pmu.c index 3cc0b3648cad..e05ab067d2f2 100644 --- a/target/riscv/pmu.c +++ b/target/riscv/pmu.c @@ -204,6 +204,7 @@ static void riscv_pmu_icount_update_priv(CPURISCVState = *env, } =20 if (env->virt_enabled) { + g_assert(env->priv <=3D PRV_S); counter_arr =3D env->pmu_fixed_ctrs[1].counter_virt; snapshot_prev =3D env->pmu_fixed_ctrs[1].counter_virt_prev; } else { @@ -212,6 +213,7 @@ static void riscv_pmu_icount_update_priv(CPURISCVState = *env, } =20 if (new_virt) { + g_assert(newpriv <=3D PRV_S); snapshot_new =3D env->pmu_fixed_ctrs[1].counter_virt_prev; } else { snapshot_new =3D env->pmu_fixed_ctrs[1].counter_prev; @@ -242,6 +244,7 @@ static void riscv_pmu_cycle_update_priv(CPURISCVState *= env, } =20 if (env->virt_enabled) { + g_assert(env->priv <=3D PRV_S); counter_arr =3D env->pmu_fixed_ctrs[0].counter_virt; snapshot_prev =3D env->pmu_fixed_ctrs[0].counter_virt_prev; } else { @@ -250,6 +253,7 @@ static void riscv_pmu_cycle_update_priv(CPURISCVState *= env, } =20 if (new_virt) { + g_assert(newpriv <=3D PRV_S); snapshot_new =3D env->pmu_fixed_ctrs[0].counter_virt_prev; } else { snapshot_new =3D env->pmu_fixed_ctrs[0].counter_prev; --- base-commit: daff9f7f7a457f78ce455e6abf19c2a37dfe7630 change-id: 20240723-fixes-439b929bfbc8 -- Regards, Atish patra