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 5D970F3D5E5 for ; Sun, 29 Mar 2026 04:39:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9CA256B008C; Sun, 29 Mar 2026 00:39:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 979C36B008A; Sun, 29 Mar 2026 00:39:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 7F37F6B0099; Sun, 29 Mar 2026 00:39:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 69DFB6B008A for ; Sun, 29 Mar 2026 00:39:08 -0400 (EDT) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 1672AC1A53 for ; Sun, 29 Mar 2026 04:39:08 +0000 (UTC) X-FDA: 84597845976.04.3454DF6 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf02.hostedemail.com (Postfix) with ESMTP id 852A88000A for ; Sun, 29 Mar 2026 04:39:06 +0000 (UTC) Authentication-Results: imf02.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=aWioIKs2; spf=pass (imf02.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-Authentication-Results: i=1; imf02.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=aWioIKs2; spf=pass (imf02.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-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1774759146; a=rsa-sha256; cv=none; b=PoB9/LzPxwmRLpEYk9D0xjG2MxSJoRTN4/J1lS2vG9HypIhHOLzSn+/hHW6QAv+dki/aYr C5FE8HPiCbgup7eH1Cv7WEfpgys8wG9i+oGTKUf2IiKWqewpliLkcGgiyuOU3x0gsWGUTE A6OcGRIM73MhovR61goU3nP/RJ/PQTs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1774759146; 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:references:dkim-signature; bh=2gfAlNG5U04l/q/YgcKWhVkzdECVNPEn8D95W9kAsAc=; b=lp3Erel+TVRGmT4vtZzFPdGnUFlvQHmuggoMHb0Q4Ozxa6zx2VF1SIse4ObIAOmSvWaAwo AkVSp0xuvTCy6Hw7qiv8y5fRhS2zEhnu2wokWiENvnyjqtS5oOOOJxn0Q0le+Ltp2uakJU YPEj2NwrLtT5ctqe7Y4KQIyV5RVn/5Q= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 50FE8401B1; Sun, 29 Mar 2026 04:39:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0A376C116C6; Sun, 29 Mar 2026 04:39:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774759145; bh=kObMod5TMzaMvBn9+D3aTOIeg1hrGWniApE2U38771M=; h=From:To:Cc:Subject:Date:From; b=aWioIKs22y5/mjG5KKkFStFFpJNa9vjoB0awkplXzZnZQ+qMnq+DHQ2einzBTGE64 TlNDNmpEM7xhLmGqU50eaNVZXljG6odEw4tshT/VuVjAQ46+2gr1xU93LJVkJEgPts b/8y+p3vLNKAeEhWqFqEOrxCWcDcVwspHzbDEq+/NBFLT2PrBgmmvQnyC4OfJk1AC6 lcgppInOTlztPpc0EQVdEZYTePCAqS17O04KvKACukJnvgUFksEnFqGxoI5iwtY7CN RUBRcD0nCqcwiD4QJUKzemmJ9+ck8qNMbGg4H6HxOGmGJsWniSaotfiM3bv3lTJNgk zLCYk4dkNU37w== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , "# 6 . 16 . x" , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 0/2] mm/damon/core: validate damos_quota_goal->nid Date: Sat, 28 Mar 2026 21:38:58 -0700 Message-ID: <20260329043902.46163-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 852A88000A X-Stat-Signature: sj1wirq7hfq7qrdzw1zbad4ebdpbm8a9 X-Rspam-User: X-HE-Tag: 1774759146-381804 X-HE-Meta: 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 Hktk1L6h 0myQR+AtOto2NFk1QQOSxcgC3wmsHjqZvpHok+xL1TQmehAniccaPfYq6VF4aDEK9/3iVsxNEP09TGOYt8ca4Pxqw+592rX4x+pJ6nPszkgIJqvi/Bfq1O9FG63A2WVb2/fr69W6ebis9na7yo4tI5jj+PgdqH4c2+Tn0FrRe2KopNLcqFTMC0MFStI2ATQDfkGoumF1G0sO9UoLZKtwE5X2pk7Pgd45pFvJLtCWfFKoqyA1YZM2ieKdr0ilh5DZEU9DJZZuSMw4D1qoSQIBykFwgsU4z49SRWFnJKpTp0l8Lk5HpzDF+3ijRT3u2WIlJri8uscGv0OsLymw= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: node_mem[cg]_{used,free}_bp DAMOS quota goals receive the node id. The node id is used for si_meminfo_node() and NODE_DATA() without proper validation. As a result, privileged users can trigger an out of bounds memory access using DAMON_SYSFS. Fix the issues. The issue was originally reported [1] with a fix by another author. The original author announced [2] that they will stop working including the fix that was still in the review stage. Hence I'm restarting this. [1] https://lore.kernel.org/20260325073034.140353-1-objecting@objecting.org [2] https://lore.kernel.org/20260327040924.68553-1-sj@kernel.org Changes from RFC (https://lore.kernel.org/20260328005412.7606-1-sj@kernel.org) - fix typo in patch 2: s/MEM/MEMCG/. - rebase to latest mm-new. SeongJae Park (2): mm/damon/core: validate damos_quota_goal->nid for node_mem_{used,free}_bp mm/damon/core: validate damos_quota_goal->nid for node_memcg_{used,free}_bp mm/damon/core.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) base-commit: 2f8cc7995d75c89079c55a85fc1d3092ffb7bd59 -- 2.47.3