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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id A22ACC352A1 for ; Sun, 27 Nov 2022 22:28:54 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 976C46B0072; Sun, 27 Nov 2022 17:28:53 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 924FE6B0073; Sun, 27 Nov 2022 17:28:53 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 813D96B0074; Sun, 27 Nov 2022 17:28:53 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id 6F42A6B0072 for ; Sun, 27 Nov 2022 17:28:53 -0500 (EST) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 484161A075F for ; Sun, 27 Nov 2022 22:28:53 +0000 (UTC) X-FDA: 80180663346.08.4EDA552 Received: from aposti.net (aposti.net [89.234.176.197]) by imf27.hostedemail.com (Postfix) with ESMTP id ACF9D40008 for ; Sun, 27 Nov 2022 22:28:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1669588130; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding:in-reply-to: references; bh=gGhS+gjWIS8ZrXKdyUu4RaesR9AwE+r1bkf2O8duDok=; b=rzUG5fJ64gHF86zW+bwbeAu50Hk4CmIIEQk1MpzDaufwF2WBmrRsudPOal4LNnKwIC6HmZ Ei4c04Xi/fTXCzvzN/RgqGYta4eaKISK6unBza3kyEDXhVm4XYb53qR8hxzIrkICNg3MGB thJGzrNqjiDG6MdsRdlLZv053EJ20hM= Date: Sun, 27 Nov 2022 22:28:41 +0000 From: Paul Cercueil Subject: of_reserved_mem_device_init() prints kernel memory in dmesg To: Marek Szyprowski , Christoph Hellwig Cc: linux-kernel , Linux Memory Management List Message-Id: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed ARC-Authentication-Results: i=1; imf27.hostedemail.com; dkim=pass header.d=crapouillou.net header.s=mail header.b=rzUG5fJ6; spf=pass (imf27.hostedemail.com: domain of paul@crapouillou.net designates 89.234.176.197 as permitted sender) smtp.mailfrom=paul@crapouillou.net; dmarc=pass (policy=none) header.from=crapouillou.net ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1669588132; a=rsa-sha256; cv=none; b=iAFmP8yqfM8UKYymHO3Cuo1qq+kmfOoeMjON+Imc1Bbb8yu6NmYQmBUTcZ0e2gbs+h6vD4 K8qQwa/gPlU6AsUK61yvGMSxKwFKoIGzQ6PVUW22Bo4amfNyeE0bFueCQubGrnXAaGNBtM fGKmpLQHFBrviolSZrxt37Bp6ylllAI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1669588132; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=gGhS+gjWIS8ZrXKdyUu4RaesR9AwE+r1bkf2O8duDok=; b=w5b30WD9+CWEBWj1CA0W8rPu8lEyiIz372tCXfLHLJy1m7jqw3XI3/8GOmhwoLr1BfN/2U UHSn06kqeIAMCa+EU4CKazO413LGXDI0HSVjk8LhDZpP4A6Hd6kX/iLPF1O1M28BrchqlK XQTiVduE6fMDmo3C3RKHpgQ/gJObXmo= X-Rspamd-Queue-Id: ACF9D40008 X-Rspam-User: Authentication-Results: imf27.hostedemail.com; dkim=pass header.d=crapouillou.net header.s=mail header.b=rzUG5fJ6; spf=pass (imf27.hostedemail.com: domain of paul@crapouillou.net designates 89.234.176.197 as permitted sender) smtp.mailfrom=paul@crapouillou.net; dmarc=pass (policy=none) header.from=crapouillou.net X-Rspamd-Server: rspam02 X-Stat-Signature: j4h1j1ne9my411soerg71mcfoghbsii4 X-HE-Tag: 1669588132-507041 X-Bogosity: Ham, tests=bogofilter, spamicity=0.002994, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Christoph, Marek, Here's what I get in dmesg on a 6.1-rc6 kernel: OF: fdt: Reserved memory: reserved region for node 'video-memory@1f00000': base 0x01f00000, size 1 MiB OF: reserved mem: initialized node video-memory@1f00000, compatible id shared-dma-pool ingenic-drm 13050000.lcd-controller: assigned reserved memory node I would *think* it's because the name is obtained using fdt_get_name() in fdt_scan_reserved_mem(), and the pointer becomes invalid as soon as the FDT is freed (is it freed?). Not sure how to fix that myself, I tried to kstrdup(uname) in fdt_reserved_mem_save_node(), but it gives me a NULL pointer, probably too early in the boot process? Cheers, -Paul