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bh=wb/G2WI6U+bmHwkuU5P84fH/ZMN31r6Got3AOveygXo=; b=o4F26nEKfhn2hYOigpAuNYeirISWywq/hJ8/UNlMGuI9v9q0KOtgN9b3XjGUAoLD8RkiNn Fk7r9GMYJFVkY5He/7jgVVpjt9sGS31XPTydIZOtQQ99vwNh2D3pMNMu/uGbC9fKZYWYEh Tgi6E7OesN/iH+oafkym3Tuyi8OLa4I= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=odQNqTH2; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf07.hostedemail.com: domain of sj@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=sj@kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 3CCFE43707; Sun, 28 Jun 2026 21:54:53 +0000 (UTC) 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 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 0E15640002 X-Stat-Signature: uppcgxu39qumaphjkqj5qhc3sgf9813z X-HE-Tag: 1782683693-658269 X-HE-Meta: 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 y4aOif7E KVUe7LLcALAu3fgedpKI2NmsHVTX3K7D+oR9Z9Hw2gkrPEnwzOeCzJXb5nSVh9p9X+Cy8GvXIzLekSbOiFda5MEozooy7zHrQTWm02Z39bjRco7LdmjcyUvaAgFPPRMHCXfuampzl4I01EGcMHkTJOUKnW57Krs99MGW5R2+aQ/Nu63XbEqkIVpj4pnVq/P+3deYxIH0bqg7leGR/o8LiHMvpTWqCxrtV6uUuztEi13c89gHeFLdijxn20UrXPHcxrL8NCFtKqWh7PbZNuqtMyzHcyw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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