From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 97F2A23536B; Sun, 29 Mar 2026 04:39:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774759145; cv=none; b=jdvWSHyjeQplxMIfMt7ZchkGPnB1voZ0o8F976M0KijGXRfwGWMum+h+gjqO4H33i8WW0lpjhs5hNreiAsF8A1v7l/RF6eJLTjFHmj+H/8yGFcu1OtW0b9IhGcVgqyWk74YzLsnBE+2N5Pa11tZqSkTV8OVrMmdcvt5XP4ohq9M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774759145; c=relaxed/simple; bh=kObMod5TMzaMvBn9+D3aTOIeg1hrGWniApE2U38771M=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ldLcV+8+AE0iefLiDETFnC++Jd46LYZJeqzPV32q4F/h4DZ2aBg19Kxi4jgaT/htH8pwyioFOYqI3xP1hLuhkbj+QvlaTYnOqTXBrtalJ2N6M4sIulPIGKqxJcNXw4Bev880NZebl3k0u4yK/TNYdDzNho+0B8B7PC5KaXMlyFo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aWioIKs2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aWioIKs2" 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 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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