From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 8C4223B71D7; Sun, 28 Jun 2026 21:54:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782683694; cv=none; b=E03eSEJMSJp6Zr891zbpIoskBkEOQKAqfkqJBtdJaKGH5VTWJQ6cw+IJw+ofrAw1dcIlia0ATPC2Ri1W//rBBT2Ga+9JGzk4TzczHut4dqpwWxXDSLVrOC6WzzWTczop82bCcs2rRsAI89PjU2Nw93sPh9xCeCQi9cJ8d/+erjA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782683694; c=relaxed/simple; bh=RCTr6WzinCBRJCf76iFIZiBNOnNNLIMbUYmMVNswliY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=fr7TdGB4AIfqmxEDSYReYxUrlhInTfe24x/tGudSsWMeIWC10oEkAczqcJq6VfU7UF6bXKE7e5zvSOC3CcVYvJzD7JljFffG1C/3AUSOXd7/vzjcnvEEMG58LGggS8BaIndQpFPYQjOiKuGpE+cHBIWb+evYTvU8mr5MR2C7Ees= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=odQNqTH2; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="odQNqTH2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E499F1F000E9; Sun, 28 Jun 2026 21:54:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782683693; bh=wb/G2WI6U+bmHwkuU5P84fH/ZMN31r6Got3AOveygXo=; h=From:To:Cc:Subject:Date; b=odQNqTH2ZMrhe7ZozN5h/oAQeRqYWv82de3+V/fqJgmGDBk4t48gPKmL9/QgDbl3O hFyMymvuoOnpaWxR5Qg5jdHIU8rv7ZTf2fJUom07/pKHToC8vka2u23rxOUJUQ5TRg F0X0RE3Wl1TOgopWvBD075KKymx+dKmtqlbGxm3PrPDERUwc5ojjy8piMxg1fkRzK/ HSkLXPUm/qb8YSM5yN5WDE1RCcvuAhjNB/1Pk6K1DJ99Xcs4fcEwSqb6TXH7LUKKUm LnGig2acjXxO5jfQ4/0ej89esSErXW2DdRqMWI/gWdnfLnGTPg5V9UVeE/7ytF6ueK JUxZyyoShCbFw== From: SJ Park To: Andrew Morton Cc: SJ Park , "# 6 . 14 . x" , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 0/6] samples/damon: handle damon_{start,stop}() failures Date: Sun, 28 Jun 2026 14:54:39 -0700 Message-ID: <20260628215447.96166-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit All DAMON sample modules are not correctly handling failures from damon_start(). Among those, mtier also has an additional problem for handling of damon_stop() failures. wsse and prcl also have a problem in their damon_call() failure handling. As a result, memory leaks, next DAMON operation disruptions, and use-after-free can happen. Fix those. Note that only the damon_start() failure caused issues can reliably be reproduced. Reproducing those issues require the admin permission, though. Changes from RFC v4 - RFC v4: https://lore.kernel.org/20260610135546.64943-1-sj@kernel.org/ - Collect R-b: from Zenghui Yu. - Rebase to latest mm-new. - Drop RFC. Changes from RFC v3 - RFC v3: https://lore.kernel.org/20260610011420.3018-1-sj@kernel.org - Add damon_Call() failure handling fixes for wsse and prcl. Changes from RFC v2 - RFC v2: https://lore.kernel.org/20260609142119.68120-1-sj@kernel.org - Add damon_start() failure handling fixes for wsse and prcl. Changes from RFC v1 - RFC v1: https://lore.kernel.org/20260609005443.2122-1-sj@kernel.org - Add damon_stop() failure handling fix to the series. SJ Park (6): samples/damon/wsse: handle damon_start() failure samples/damon/prcl: handle damon_start() failure samples/damon/mtier: handle damon_start() failure samples/damon/mtier: handle damon_stop() failure samples/damon/wsse: stop and free damon ctx when damon_call() fails samples/damon/prcl: stop and free damon ctx when damon_call() fails samples/damon/mtier.c | 14 ++++++++++++-- samples/damon/prcl.c | 11 +++++++++-- samples/damon/wsse.c | 11 +++++++++-- 3 files changed, 30 insertions(+), 6 deletions(-) base-commit: 77fe35dfe005f7d55c8e729e1543b87cfc805a21 -- 2.47.3