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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 007FCCD3424 for ; Fri, 1 May 2026 09:49:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=rg6/BjuyUXCcpPF5+z/gged95vUIgjLnAi+C6UXeFxk=; b=4B5en+61xTLXeZqYFymishZCEK ko5mXuQO0Cvy5qtgg0+RSKfMQ+xhgo2jifsdGfXhAv9dydRAfHPMKWG6mZPjnuR4XOIHvPr4arBPi +qioffLkItfVD6vEBxYVIiXmogsHZIW8X6I1AGdHWGLwh8JwbzRbEJm/FrW+LsF8ZPF6LtjoOx4Jr 2L8mUmAI/mrbNEstpk7Fnrt+5nzr4o1KgzUzsMbYip6oHzNdc5jHUBxXpJ8moIk6a6OaQ/4V3XpJb ePdPU96fZ4M94HW8U6Y2vLSajT8VzYAb/4sH2nzKdZCIuDwiU9ayrM33hmJKhM2xeVWfJAH910A9w GFnEhLvA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIkVG-00000006Yl5-21wD; Fri, 01 May 2026 09:49:46 +0000 Received: from mail-pf1-x42f.google.com ([2607:f8b0:4864:20::42f]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wIkVE-00000006Yjy-1AbY for kexec@lists.infradead.org; Fri, 01 May 2026 09:49:45 +0000 Received: by mail-pf1-x42f.google.com with SMTP id d2e1a72fcca58-82f431c0ab6so865616b3a.0 for ; Fri, 01 May 2026 02:49:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1777628983; x=1778233783; darn=lists.infradead.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=rg6/BjuyUXCcpPF5+z/gged95vUIgjLnAi+C6UXeFxk=; b=jHN3JQao/X8fpe4rtlzu/MLR1lblwkuhaPUNLYhSy0+NnIc2vnQudPIsPM9me7koSN oAYP/2XUr2G4M7Laup7fg7J4N+VAVhp7uer6hg+ck564vPbyvm/gLNoccVeGyuxx7Mwk ZMlZCRVEwb4Z4c2zMvzPv8255DavTkraZbJyLe6BsbBp1UN9jHqGa8OHDoj21xoUWgF4 loUkkTtlD8Cxaim8UFrU63B7zX0Yugj6wg8SONUJTlz8GHmT8fwwUyfFjK2UHKR3b6eZ 6XfAPsefbVAdjaLNXVkUfGFYtW2gJk4IVeSmCUfzFGFoYPFEk1JKomE264JnY11kc9Om RrJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777628983; x=1778233783; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=rg6/BjuyUXCcpPF5+z/gged95vUIgjLnAi+C6UXeFxk=; b=LVoE/9cKBafJS+gox9jASXJB+DxyGfev+3Kfccl3eR7EwUnpkMIA5p78zcxVxlgk7M Z6sR747ZL5vvOW9bCXJunFEXPRQUbw3gCCXkdYll9DYfZeAlTUf9GrHURhWgSzjGwPSL MAsRNhVL74EPbDToe+ZJ6jkdLm+VIQEu+qF32C256dZNh9AKsr0n37Hc5WM+n89c2sCv J1pGce4H0HOZn+Oj7T5FQBM0D/BHLz6/hHkvgJGoldLtpEwXUBOTeOcztWkimqEw4Ila jsmVyq1HvX9QhRgZ3/3ZuntHYaepY4139rp+YpyrdjGSz/yJPNfYBJ8QjJcjD2yiH/+N Rrhg== X-Forwarded-Encrypted: i=1; AFNElJ8yvbv3aLLoYanEMGsTHHcck0ZpU20WmYT426qAEVq2UuK0JrU/P0djtcNWJG9UkSqwrfr7/Q==@lists.infradead.org X-Gm-Message-State: AOJu0YwrNHJ8WtADOxU0oUIoVkEriyQw/PsXcZn4uF1sRinuHRPpS4Vy FQo9lEbHaBQwMTqj80Tli3kTsW5aAhDR/hG4xwAeq5jpbuYyjtpFMjjs X-Gm-Gg: AeBDiesiFfVcqf4boSkZ4EzhR2GuWgYdGW9wd99nY0X+hU/Eog7ai3uDI/+8s6Zu6kc Ro/NhEuT9ZtyGC5cf9rQMtXUqZB+4LsKrEpnLS0chKUxQH9dt9vEw02E67uoFWfK6zTFSvKYFF+ reEpZXI8+sKZKKRJygY7btI1GoSDxhhdkIDN9V3oO53+BPfln+H0YgCux5rTvxmb6ZorW0ZaShO lY8BLBYuTErX+rgNOcNEJ2DaR1Gv/rhMDDwkzdSo3Z7HabhSrmfnnGHfFtEaUB6hqAgOkEv0m6Z nxK56L2AfEPxOQcaVZK1++9uo6gPhElclBqwVpE1AIkBRpSDdKr/3kLkEh9fxKuFNmmis4ojhJ/ T+OthxD2WYZR3LxpUOHe/DZWrgZndWsUC/Wehaae3uVC1c1ADhKqqopQCm9DqJNYqILIgOVcyfc 0MhIuaXW6p2HT0UuhvRmok8hWif+uwM4BgAoI/DQ== X-Received: by 2002:a05:6a00:a253:b0:82f:776f:a78d with SMTP id d2e1a72fcca58-8351a344c46mr2584281b3a.19.1777628983321; Fri, 01 May 2026 02:49:43 -0700 (PDT) Received: from laptop ([2001:4455:8025:be00:eebe:247e:613c:24d7]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8351582dd55sm2042729b3a.1.2026.05.01.02.49.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 May 2026 02:49:42 -0700 (PDT) From: Cris Jacob Maamor To: Mike Rapoport , Pasha Tatashin , Pratyush Yadav Cc: Alexander Graf , Andrew Morton , Dan Carpenter , Greg Kroah-Hartman , kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH RFC 4/5] liveupdate: validate restored LUO file-set metadata Date: Fri, 1 May 2026 17:46:36 +0800 Message-ID: <20260501094637.38650-5-crisjacobmaamor@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260501094637.38650-1-crisjacobmaamor@gmail.com> References: <20260501094637.38650-1-crisjacobmaamor@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260501_024944_319485_54D9EE55 X-CRM114-Status: UNSURE ( 9.96 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org Signed-off-by: Cris Jacob Maamor --- kernel/liveupdate/luo_file.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c index a0a419085e28..cde43d822f8f 100644 --- a/kernel/liveupdate/luo_file.c +++ b/kernel/liveupdate/luo_file.c @@ -783,11 +783,21 @@ int luo_file_deserialize(struct luo_file_set *file_set, struct luo_file_ser *file_ser; u64 i; - if (!file_set_ser->files) { - WARN_ON(file_set_ser->count); + if (!file_set_ser->count) { + if (file_set_ser->files) + return -EINVAL; return 0; } + if (file_set_ser->count > LUO_FILE_MAX) + return -EINVAL; + + if (!file_set_ser->files) + return -EINVAL; + + if (!kho_is_preserved(file_set_ser->files, LUO_FILE_PGCNT)) + return -EINVAL; + file_set->count = file_set_ser->count; file_set->files = phys_to_virt(file_set_ser->files); -- 2.53.0