From nobody Wed Oct 23 01:38:50 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; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1728413733; cv=none; d=zohomail.com; s=zohoarc; b=Hhfi9hEfeVNSKdhgILk/mA/t+OehKvN1iuTWfxV8ur5wODULfQDrTPxZOI60sOv3JzIi+JzjDLnDV1DV5MwZxWcdaReVRK2+R0uPfZsXnLX92B4d43Y+dAU5sX3uiS5jR5lHwrtdsHWyRHtAtQq098wR1nFPlqWPw6BbVFtiDQQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1728413733; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=TOn9FQKnsFqqK8dvmrqts9k4e/ZA/rwyYeo2+pg72XQ=; b=m1NpYsVff2NWkj7jtU9tjBl2tiyHmnNQhfWmGw7fvmPqKvxVXRCXrAvFz6jxAqb74/R5qQpVXZs7bI0FyqRyET2kqmKgT2Ncal4/v+O6KE5hMZjk+3ni7EbSa2NQL2NHT0kicFfKcR5KuCoTEa/5bKcc2eG5XEaTU0U0d5bpykY= 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; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1728413733895332.6389787670903; Tue, 8 Oct 2024 11:55:33 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1syFJW-0007Tg-Rn; Tue, 08 Oct 2024 14:52:06 -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 1syFJP-0007Qr-R3 for qemu-devel@nongnu.org; Tue, 08 Oct 2024 14:52:00 -0400 Received: from mail-pl1-x636.google.com ([2607:f8b0:4864:20::636]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1syFJL-0002S8-AZ for qemu-devel@nongnu.org; Tue, 08 Oct 2024 14:51:58 -0400 Received: by mail-pl1-x636.google.com with SMTP id d9443c01a7336-20b833f9b35so52365595ad.2 for ; Tue, 08 Oct 2024 11:51:46 -0700 (PDT) Received: from stoup.. (174-21-81-121.tukw.qwest.net. [174.21.81.121]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-7e9f6821c32sm7186818a12.33.2024.10.08.11.51.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Oct 2024 11:51:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728413505; x=1729018305; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=TOn9FQKnsFqqK8dvmrqts9k4e/ZA/rwyYeo2+pg72XQ=; b=YlVD4yWS0Adj4ke/Vz2TCJVjSDPbZ0DWWjhmUzhLIjGy28b9IgbUNpYfZChn4RAwSi nz/SF/NWB2EqXrwdKL3al0Rwo/Yp/2Xwdk1FJiry0ejWA3yM0iKPXwD1dl+pmRUhJuUB F9qaTOQ/b85hiKIlAV3P9vmPGGvH2eSHdfRqSP/kO9Q/oQu/3I391sxkw3hzDC2+nG58 4FyPJqbpq0aE6q6jGTFkeM76LKPuVK0xQzhbgFOB+LItLAfLUR+sutzz5CuU3mlXiJkm eezbCt8U4v5WyDpAn+M0JtMmZLxav8iSvSB50lo9RDs8VrVVkMKehYYiwPTtpfxP6B0r XI6Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728413505; x=1729018305; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=TOn9FQKnsFqqK8dvmrqts9k4e/ZA/rwyYeo2+pg72XQ=; b=QtnVdHj+//FGJN06mCeydEPhnA7HI0IoaK5K2haRyCl3s1q3mtGmZXL/9/itDFaeVC 9bOqfWKBiJxdaXfkZwOy/Y3JnkItGNzzFPf7rAjhpHX/zVEcdKw+GvohRYXjbg8tioEr PDoJufADBDZQpJVaClpuTgQhhbS5YFCY5KGTIKo8GIKFP0pkGTHLoDm2pkHpXRmiVLF1 6QfUpfBQboFcHZwgRjMvJR/OnUXXQywNSL1GnJGSMrEcIMyBJZrTtSj2d+U9kwT2gS19 c8MWY1n/Ktk5402EScnCDcEbqYMQJecvAuVKRC6+J5ySlcIBI2xPoRCvo4ZDJBL15zEF kAAg== X-Gm-Message-State: AOJu0YzvnDR/u6PXN1ncUVZdnPoEo2pfQ5+TbVJeSaOmWQ3K7iMkad1/ XXSISp1AAyI32xTBuW5BaUMfoXd24LzDgVi9XuE5eBoQHT/svghCwiif7icvCCPvn0WznRZrLeM q X-Google-Smtp-Source: AGHT+IFOv8diGM21FYv9YDwizxS5s028Hi+fU2TCwgadH+mZHg6bnJk/BU1A3/rPydAYDPtDqSLVPQ== X-Received: by 2002:a17:903:2289:b0:20c:61f8:f45d with SMTP id d9443c01a7336-20c61f8f6admr6163045ad.22.1728413505243; Tue, 08 Oct 2024 11:51:45 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Michael Tokarev Subject: [PULL 02/14] linux-user: Fix parse_elf_properties GNU0_MAGIC check Date: Tue, 8 Oct 2024 11:51:29 -0700 Message-ID: <20241008185141.20057-3-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241008185141.20057-1-richard.henderson@linaro.org> References: <20241008185141.20057-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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::636; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x636.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: 2.1.29 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 @linaro.org) X-ZM-MESSAGEID: 1728413734979116600 Comparing a string of 4 bytes only works in little-endian. Adjust bulk bswap to only apply to the note payload. Perform swapping of the note header manually; the magic is defined so that it does not need a runtime swap. Fixes: 83f990eb5adb ("linux-user/elfload: Parse NT_GNU_PROPERTY_TYPE_0 note= s") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2596 Signed-off-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Michael Tokarev --- linux-user/elfload.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 0678c9d506..52c88a68a9 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -3121,11 +3121,11 @@ static bool parse_elf_properties(const ImageSource = *src, } =20 /* - * The contents of a valid PT_GNU_PROPERTY is a sequence - * of uint32_t -- swap them all now. + * The contents of a valid PT_GNU_PROPERTY is a sequence of uint32_t. + * Swap most of them now, beyond the header and namesz. */ #ifdef BSWAP_NEEDED - for (int i =3D 0; i < n / 4; i++) { + for (int i =3D 4; i < n / 4; i++) { bswap32s(note.data + i); } #endif @@ -3135,15 +3135,15 @@ static bool parse_elf_properties(const ImageSource = *src, * immediately follows nhdr and is thus at the 4th word. Further, all * of the inputs to the kernel's round_up are multiples of 4. */ - if (note.nhdr.n_type !=3D NT_GNU_PROPERTY_TYPE_0 || - note.nhdr.n_namesz !=3D NOTE_NAME_SZ || + if (tswap32(note.nhdr.n_type) !=3D NT_GNU_PROPERTY_TYPE_0 || + tswap32(note.nhdr.n_namesz) !=3D NOTE_NAME_SZ || note.data[3] !=3D GNU0_MAGIC) { error_setg(errp, "Invalid note in PT_GNU_PROPERTY"); return false; } off =3D sizeof(note.nhdr) + NOTE_NAME_SZ; =20 - datasz =3D note.nhdr.n_descsz + off; + datasz =3D tswap32(note.nhdr.n_descsz) + off; if (datasz > n) { error_setg(errp, "Invalid note size in PT_GNU_PROPERTY"); return false; --=20 2.43.0