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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D55EFC43458 for ; Sun, 5 Jul 2026 15:56:35 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 780FE6B00A7; Sun, 5 Jul 2026 11:56:10 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6E37D6B00A9; Sun, 5 Jul 2026 11:56:10 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5AAA76B00AB; Sun, 5 Jul 2026 11:56:10 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 35BFA6B00A7 for ; Sun, 5 Jul 2026 11:56:10 -0400 (EDT) Received: from smtpin29.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay10.hostedemail.com (Postfix) with ESMTP id B94BEC0475 for ; Sun, 5 Jul 2026 15:56:09 +0000 (UTC) X-FDA: 84955174458.29.D24C129 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf04.hostedemail.com (Postfix) with ESMTP id 268B040002 for ; Sun, 5 Jul 2026 15:56:08 +0000 (UTC) Authentication-Results: imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=C6MmsbUS; spf=pass (imf04.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783266968; 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-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=4VafhRbm8rnHMCZpEIBC3NAXIVyFpdQKn/cpt2JTi7U=; b=P1f9KqQBg8PxgfJTf0RWzWscmmRpwvwvvDVYbpBRP4HyWvsbTdmvLH5xAZ18RYkTPuZbml GtuSH+jCRmAuDYCCr1r3Utzy/j7P/FecliiwIBPCS1RFcSYVIdH4KOxq1U7ieGn1WEFlEc vgRKle1jDFP20d8TGB6YCCyGH6oOuxQ= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783266968; b=YgQP3RMbn2weNc5b/Um1Uop2jHULMx6mb0jnWznDNs00xTR2HnLGJFsXmfRiNruj7Bv+vG Y38OxxgCPp937p2itEKdIemqulQTYfValxAM3NeAdhnx21TlKK19kMhjZVOTnlS+r50biD bmpWfmzYY52wCPLawccMY9ZyoXhegbQ= ARC-Authentication-Results: i=1; imf04.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=C6MmsbUS; spf=pass (imf04.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 7B8FE43C1B; Sun, 5 Jul 2026 15:56:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 397F51F000E9; Sun, 5 Jul 2026 15:56:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783266967; bh=4VafhRbm8rnHMCZpEIBC3NAXIVyFpdQKn/cpt2JTi7U=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=C6MmsbUSMWJyRvF1mGdO+EmcCiAWgxvSYbcLNiXa/aQBbPxCPiH5jb6aQG4UZ4aB2 VXRPOXGSkMdGrhLaFI2ofZdahjG898Ul/o5lPQac1Ba7lqSsBlljglDhmewAhNRH6B 3IJeJT/9cVpZ9mVWkh9cZjWo2Iy/WwrBAZt6GtM6r0hRLINZokrlPnF6+93ldahHpa LdK0rwG1a6HRIEXnS8ClAbje3Hwaafe6ANBnTRlMppQpf/6HWEigDnthf8I0Oq+lT3 7Q4X1S8ESLtOTW8fJaLPlpjF3ztNgl6eqK09j99JIQRKOpoFE/3PirGD/YZUuPrHb+ HKJbhuBfjXH8Q== From: SJ Park To: Andrew Morton Cc: SJ Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 8/8] mm/damon/sysfs: remove region size validation Date: Sun, 5 Jul 2026 08:55:59 -0700 Message-ID: <20260705155600.96555-9-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260705155600.96555-1-sj@kernel.org> References: <20260705155600.96555-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 268B040002 X-Stat-Signature: cfznsngty4rhxxkmnzay4u7heh757a6m X-HE-Tag: 1783266968-363280 X-HE-Meta: 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 NaLZz41i E5+3AwCyJHoOdkJ+fTXIUozdAXN0u2EONZHLo+h+nD2DGucecdqm2hw6O7mBSzXv1f8ulJv38OFgqlLSJWIk9RdHf55KoXliNClDhDNIp2X2Jyf0C8H4Y3gakO6HZTgvFNzdhQrTug05MQOSJBRZTwAwDJEC/u8AXb+H8pwgY33XWzczAqmQSoYAdnaZMrGUavpDuF9vc5Qql4Qdy1c/OBo9RyBcDAvzeX3jjT8wxRr2Jer8= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: DAMON_SYSFS validates user inputs for monitoring target regions to disallow negative size regions. DAMON core assumes only positive size regions, though. The validation is incomplete. Fortunately damon_set_regions(), which is eventually used by DAMON_SYSFS, does the complete validation. Remove the incomplete and unnecessary validation. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index e666dddf1feba..b65651498e0d1 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -1987,9 +1987,6 @@ static int damon_sysfs_set_regions(struct damon_target *t, struct damon_sysfs_region *sys_region = sysfs_regions->regions_arr[i]; - if (sys_region->ar.start > sys_region->ar.end) - goto out; - ranges[i].start = sys_region->ar.start; ranges[i].end = sys_region->ar.end; if (i == 0) -- 2.47.3