From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A6F3C433F5 for ; Wed, 13 Oct 2021 03:03:42 +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 4830B60F21 for ; Wed, 13 Oct 2021 03:03:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4830B60F21 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:40420 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1maUYP-0000K2-Bc for qemu-devel@archiver.kernel.org; Tue, 12 Oct 2021 23:03:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57086) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1maUI0-0004yW-Ei for qemu-devel@nongnu.org; Tue, 12 Oct 2021 22:46:44 -0400 Received: from mail-pf1-x42c.google.com ([2607:f8b0:4864:20::42c]:44991) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1maUHy-00058j-QS for qemu-devel@nongnu.org; Tue, 12 Oct 2021 22:46:44 -0400 Received: by mail-pf1-x42c.google.com with SMTP id w6so1131734pfd.11 for ; Tue, 12 Oct 2021 19:46:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=OxMgM7wzD4BcAcUx2qJmodE4BwJ9QwGNSAt09qoFyFU=; b=Tb6Cp1cgY8OBfvyhPmsjUTlr/Dpqx0iV0P617ZHJTnpJyD2bliSSVuXt5LZxGhiZta uXxZ1krBrUCiwxzFRazOgsdNhMeTp9uZlLd/c4ygbMbxCVaxWMVd0a2CLM2E6toBhn5N TU7AXfIvC6tMUCLtHR6ZGEcCydEQ3s0Jm2+VDz38pt9H13KEA6CMjfxAr7+mPbAdFjDj ELt7iiQaVAhFpQYlbmxAUioAEYyJj/MC5KIvi+iYLG3WWt5V5ehsqRdtN7OnLkEtZPg+ F8QNRSkKLZLszVdNLcmRWjb2nsriPjxmHkE4K3eW9FHIZma/v3q6cc8S7zDL2NJDHuCT 5rnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=OxMgM7wzD4BcAcUx2qJmodE4BwJ9QwGNSAt09qoFyFU=; b=vnJUHTbIHVV12lClkJSojDO3xpf8r7bugoO2Cr/+JWnqwnoaVwQMmW1NRvfWiLzQka /Qi4A7FB/+zlzEYOr9Gii/X8L7zFnjHnre9EY7EQa61ayrZh5DKAT05j0qQwy2dKu3tO dewJspfdR+MTwi33h9emlhB7nKbf0vyDyGldIAJkCTkqSUpJNTryNuj97ca5QfYsIzep ldiHbQYFBmVKIijV3bpvHb19W89VDx5qwCGN8mFI6t6g3NnAVbyXI8C0qED92+5Li+uk emPzThQf0o9/KfaQ7l+BgGHYO24qB1d7okI8kQXD8+CpuNeGYr9CK0J+qNldM93S0mvC SUPw== X-Gm-Message-State: AOAM530fpU9PWuNK7Tg9k6l0prq8GEeFWI2Q91i9m4wPb52qsvATQorJ Gr7OD0D8icIZGTi7UHxa89Xw4XCWALAvDA== X-Google-Smtp-Source: ABdhPJwDFRBpL59+pxRRYKwbEoH62nsNnaQdqnH51WkdIkCfizwcdFodiudPzDMKmzDKGxIeFTRjiQ== X-Received: by 2002:a62:1995:0:b0:44c:728e:323b with SMTP id 143-20020a621995000000b0044c728e323bmr35081202pfz.54.1634093201429; Tue, 12 Oct 2021 19:46:41 -0700 (PDT) Received: from localhost.localdomain ([71.212.134.125]) by smtp.gmail.com with ESMTPSA id qe17sm4855014pjb.39.2021.10.12.19.46.40 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Oct 2021 19:46:40 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v4 32/48] linux-user: Disable more prctl subcodes Date: Tue, 12 Oct 2021 19:45:51 -0700 Message-Id: <20211013024607.731881-33-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211013024607.731881-1-richard.henderson@linaro.org> References: <20211013024607.731881-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::42c; envelope-from=richard.henderson@linaro.org; helo=mail-pf1-x42c.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-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: 2.1.23 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" Create a list of subcodes that we want to pass on, a list of subcodes that should not be passed on because they would affect the running qemu itself, and a list that probably could be implemented but require extra work. Do not pass on unknown subcodes. Signed-off-by: Richard Henderson --- linux-user/syscall.c | 56 ++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 52 insertions(+), 4 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index a417396981..7635c2397a 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6334,6 +6334,13 @@ abi_long do_arch_prctl(CPUX86State *env, int code, abi_ulong addr) # define PR_MTE_TAG_SHIFT 3 # define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT) #endif +#ifndef PR_SET_IO_FLUSHER +# define PR_SET_IO_FLUSHER 57 +# define PR_GET_IO_FLUSHER 58 +#endif +#ifndef PR_SET_SYSCALL_USER_DISPATCH +# define PR_SET_SYSCALL_USER_DISPATCH 59 +#endif #include "target_prctl.h" @@ -6430,13 +6437,54 @@ static abi_long do_prctl(CPUArchState *env, abi_long option, abi_long arg2, return -TARGET_EINVAL; } return do_prctl_get_tagged_addr_ctrl(env); + + case PR_GET_DUMPABLE: + case PR_SET_DUMPABLE: + case PR_GET_KEEPCAPS: + case PR_SET_KEEPCAPS: + case PR_GET_TIMING: + case PR_SET_TIMING: + case PR_GET_TIMERSLACK: + case PR_SET_TIMERSLACK: + case PR_MCE_KILL: + case PR_MCE_KILL_GET: + case PR_GET_NO_NEW_PRIVS: + case PR_SET_NO_NEW_PRIVS: + case PR_GET_IO_FLUSHER: + case PR_SET_IO_FLUSHER: + /* Some prctl options have no pointer arguments and we can pass on. */ + return get_errno(prctl(option, arg2, arg3, arg4, arg5)); + + case PR_GET_CHILD_SUBREAPER: + case PR_SET_CHILD_SUBREAPER: + case PR_GET_SPECULATION_CTRL: + case PR_SET_SPECULATION_CTRL: + case PR_GET_TID_ADDRESS: + /* TODO */ + return -TARGET_EINVAL; + + case PR_GET_FPEXC: + case PR_SET_FPEXC: + /* Was used for SPE on PowerPC. */ + return -TARGET_EINVAL; + + case PR_GET_ENDIAN: + case PR_SET_ENDIAN: + case PR_GET_FPEMU: + case PR_SET_FPEMU: + case PR_SET_MM: case PR_GET_SECCOMP: case PR_SET_SECCOMP: - /* Disable seccomp to prevent the target disabling syscalls we need. */ - return -TARGET_EINVAL; + case PR_SET_SYSCALL_USER_DISPATCH: + case PR_GET_THP_DISABLE: + case PR_SET_THP_DISABLE: + case PR_GET_TSC: + case PR_SET_TSC: + case PR_GET_UNALIGN: + case PR_SET_UNALIGN: default: - /* Most prctl options have no pointer arguments */ - return get_errno(prctl(option, arg2, arg3, arg4, arg5)); + /* Disable to prevent the target disabling stuff we need. */ + return -TARGET_EINVAL; } } -- 2.25.1