From patchwork Sat Jan 16 22:09:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Timur Tabi X-Patchwork-Id: 12025111 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20319C433E6 for ; Sat, 16 Jan 2021 22:10:08 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A9FC322CAE for ; Sat, 16 Jan 2021 22:10:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A9FC322CAE Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 457DD8D0211; Sat, 16 Jan 2021 17:10:07 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 3E25B8D01D5; Sat, 16 Jan 2021 17:10:07 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2D2398D0211; Sat, 16 Jan 2021 17:10:07 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0105.hostedemail.com [216.40.44.105]) by kanga.kvack.org (Postfix) with ESMTP id 0A57E8D01D5 for ; Sat, 16 Jan 2021 17:10:07 -0500 (EST) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id C7B044DA8 for ; Sat, 16 Jan 2021 22:10:06 +0000 (UTC) X-FDA: 77713032012.13.lunch83_400e0f72753b Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id A4A3818140B80 for ; Sat, 16 Jan 2021 22:10:06 +0000 (UTC) X-HE-Tag: lunch83_400e0f72753b X-Filterd-Recvd-Size: 2481 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf41.hostedemail.com (Postfix) with ESMTP for ; Sat, 16 Jan 2021 22:10:06 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 5510722D75; Sat, 16 Jan 2021 22:10:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610835005; bh=5jSZTdncwbDwBj7VAjrWMlgjCqKLR7rKVzIK8UcQiJY=; h=From:To:Subject:Date:In-Reply-To:References:From; b=QxfFEF+8wT0tnA3OgQi2RxH/KnSjVQhL2LIIIPWMc4inF8qsj0I5dlG1hTgt7ShRn coizL8dTtGmZAgSUSXEXJ16Xw6AKr+LzxsnArykwRWliL8/DSyWhX5OxBLP6aL4/d7 gatwb/MKcRBPBtm0VlT0pHVjBM1O2hzGQhH+o0foCG2sDN8GSJB/fPz1inDuH2Z4wY mtUXVmatPgYay5AyO02HyaXZjNmw7n5vw1EdVY0QGDb+spHzvb7+AR1usBl6guIac6 RxIZWtIBHwnUgA/ZHdETFNV6PAKJwd4C+nXZ6vaxeH5hNAug53E/Xd7X9li7eSEAMj lhNxQqiuN6dUA== From: Timur Tabi To: Andrew Morton , linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, Sergey Senozhatsky , Petr Mladek , roman.fietze@magna.com, keescook@chromium.org, Steven Rostedt , John Ogness , linux-mm@kvack.org, Akinobu Mita Subject: [PATCH 2/2] mm/page_poison: use unhashed address in hexdump for check_poison_mem() Date: Sat, 16 Jan 2021 16:09:50 -0600 Message-Id: <20210116220950.47078-3-timur@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210116220950.47078-1-timur@kernel.org> References: <20210116220950.47078-1-timur@kernel.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Now that print_hex_dump() is capable of printing unhashed addresses, use that feature in the code that reports memory errors. Hashed addresses don't tell you where the corrupted page actually is. Signed-off-by: Timur Tabi --- mm/page_poison.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/page_poison.c b/mm/page_poison.c index 65cdf844c8ad..4902f3261ee4 100644 --- a/mm/page_poison.c +++ b/mm/page_poison.c @@ -67,7 +67,7 @@ static void check_poison_mem(unsigned char *mem, size_t bytes) else pr_err("pagealloc: memory corruption\n"); - print_hex_dump(KERN_ERR, "", DUMP_PREFIX_ADDRESS, 16, 1, start, + print_hex_dump(KERN_ERR, "", DUMP_PREFIX_UNHASHED, 16, 1, start, end - start + 1, 1); dump_stack(); }