From patchwork Sat Sep 30 23:53:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Viktor Prutyanov X-Patchwork-Id: 1841666 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=daynix-com.20230601.gappssmtp.com header.i=@daynix-com.20230601.gappssmtp.com header.a=rsa-sha256 header.s=20230601 header.b=Cyc42Kfm; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RykZw6QV8z1yng for ; Sun, 1 Oct 2023 10:54:16 +1100 (AEDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qmjmC-0004NA-52; Sat, 30 Sep 2023 19:53:36 -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 1qmjm8-0004MT-LR for qemu-devel@nongnu.org; Sat, 30 Sep 2023 19:53:32 -0400 Received: from mail-lf1-x136.google.com ([2a00:1450:4864:20::136]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qmjm6-0007vl-0B for qemu-devel@nongnu.org; Sat, 30 Sep 2023 19:53:31 -0400 Received: by mail-lf1-x136.google.com with SMTP id 2adb3069b0e04-5041d6d8b10so24555836e87.2 for ; Sat, 30 Sep 2023 16:53:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=daynix-com.20230601.gappssmtp.com; s=20230601; t=1696118008; x=1696722808; 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=7UfzjErjTODwvTW2xkD20tjGZ4cTrTpKUNfwuop7eBU=; b=Cyc42KfmlbvkmMoPonJcDP6gCfhw0pSTehloWojFQWHrH43WsHW0AKiWcFHSmBBGeS 6gBUx+n5pNgU0YU0GWSbAFhH3S9cTdIAcY+9YSNBXIKxf/RK0izFkXnauzkrpkA9PuDi u0k3pQLh6+Js4YEtSET9bznrwCrhKy/m27ZvgQduaamiuWdn0pE8/pQdfGxhd6hKFGEQ ZuVztEUf+mk9+CbxmVGOu1ZVI2nyLP2cBbG15FvDb+v8NtTCLMfypq/s7S+N6wFCzgxF Rctk1xjb/s9uigBoUvpf5k1yUsWARNWCpVklE5t4vpuYDG5oLdyQMxsI8oEPUCuKVY88 JliQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696118008; x=1696722808; 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=7UfzjErjTODwvTW2xkD20tjGZ4cTrTpKUNfwuop7eBU=; b=wrxYY9MYlqVGAaXiuhPz89a82cVfqvamCUHqij0nNXUgjjvRmWkRw2DLlqPA2ECTef MkSUpricH0XtyXPpYXrH6T4xSvesBdHsymM1g95KC/KjAgLYDdWjcfq1uCvjAeIT2dce ltTQ+o3xnKw8IgEpQscMYVg+KLjWwnhnFQeI/1kUyFzdcY3gW2A9OHev0BhO2IrkYBa+ dc2S1qYgmfvyMARfgYaNPxhfUWOciG36ftpA3Xk0kMGhVReWDutHx8EcHjEsHoLZ4Aen JzAUYB5lQRmA9dM2lcyhozmrnu2WNh4ga/hbXn+0TDGiORQ9vAMqn5hzJ4qw1aSRKaWn mGRQ== X-Gm-Message-State: AOJu0Yz2qIXkuo7HI6xaZhoWWFctjxs//Y82Xi3Fy9aw79G6KEMlJSIu lYV64rNqsyN/GFgWQR/IgXtEL7ohNncW8BVYVE/scQ== X-Google-Smtp-Source: AGHT+IG3i8Qtf6Z3n7Lvg9mHK+fMiAMqnckr7k+r59YC3Gmfdf9qnnw4JsLWr8C2NaB8t+jgYrMEvw== X-Received: by 2002:ac2:4ec8:0:b0:500:79f7:1738 with SMTP id p8-20020ac24ec8000000b0050079f71738mr5430881lfr.17.1696118008452; Sat, 30 Sep 2023 16:53:28 -0700 (PDT) Received: from localhost.localdomain (109-252-90-8.nat.spd-mgts.ru. [109.252.90.8]) by smtp.gmail.com with ESMTPSA id h18-20020a197012000000b0050309ea3a62sm4012391lfc.277.2023.09.30.16.53.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 30 Sep 2023 16:53:28 -0700 (PDT) From: Viktor Prutyanov To: peter.maydell@linaro.org Cc: qemu-devel@nongnu.org, akihiko.odaki@daynix.com, yan@daynix.com, viktor@daynix.com, viktor.prutyanov@phystech.edu Subject: [PATCH v2 2/2] elf2dmp: check array bounds in pdb_get_file_size Date: Sun, 1 Oct 2023 02:53:17 +0300 Message-Id: <20230930235317.11469-3-viktor@daynix.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20230930235317.11469-1-viktor@daynix.com> References: <20230930235317.11469-1-viktor@daynix.com> MIME-Version: 1.0 Received-SPF: none client-ip=2a00:1450:4864:20::136; envelope-from=viktor@daynix.com; helo=mail-lf1-x136.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_NONE=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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Index in file_size array must be checked against num_files, because the entries we are looking for may be absent in the PDB. Fixes: Coverity CID 1521597 Signed-off-by: Viktor Prutyanov Reviewed-by: Philippe Mathieu-Daudé --- contrib/elf2dmp/pdb.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/contrib/elf2dmp/pdb.c b/contrib/elf2dmp/pdb.c index 6ca5086f02..8e3c18c82f 100644 --- a/contrib/elf2dmp/pdb.c +++ b/contrib/elf2dmp/pdb.c @@ -25,6 +25,10 @@ static uint32_t pdb_get_file_size(const struct pdb_reader *r, unsigned idx) { + if (idx >= r->ds.toc->num_files) { + return 0; + } + return r->ds.toc->file_size[idx]; } @@ -159,16 +163,17 @@ static void *pdb_ds_read_file(struct pdb_reader* r, uint32_t file_number) static int pdb_init_segments(struct pdb_reader *r) { - char *segs; unsigned stream_idx = r->segments; - segs = pdb_ds_read_file(r, stream_idx); - if (!segs) { + r->segs = pdb_ds_read_file(r, stream_idx); + if (!r->segs) { return 1; } - r->segs = segs; r->segs_size = pdb_get_file_size(r, stream_idx); + if (!r->segs_size) { + return 1; + } return 0; }