From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.2]) (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 3F7612D3725; Wed, 13 May 2026 14:03:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.2 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778681028; cv=none; b=ZjMhHEFnfs2C2p4Wu2eo+rJyoRdfz3681e/AKtIl2s4gJfhvJS+8x2uy4FlWCmq6beH8vOleHKufAySkjekBBdtRsf/FlmftjnbC1f2blJ9IZ++57YHMGp2z0Y/I2DzYp9On6RsyffWQl3lpQmvt+6sOwVUk+ynmjxTxiRrWOn8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778681028; c=relaxed/simple; bh=+DlhqxbsUxs8TSFy328TyjZOji9gRCtPaLK2MQ9YrE0=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=oTaPN23S40goZkUr3BwP0onqQRqGwuevUe3KQXzaob+Z6fxt1B5PGiR7zFzlT2XDIMTO4HJO3mgbjPC5qYYHNj6mPMnvQn9kd/V1Ro5/ChGrWFFGv32PV69elWvyeA5UNFi4PVebkHVBQIKvC3xnGNDt3OKrNw26WN264deq96U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=JWcMztLE; arc=none smtp.client-ip=117.135.210.2 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="JWcMztLE" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=/l wiOPTnvlBpog3cv49D12gfGRsm5qJ0BLZQamnSSg0=; b=JWcMztLEhA7kS0JHqg EmpAqZK9WQoqCxXZzTk5weZVCoW5P+6gMt9FWbXLePTUj99/RmkKih2od4xB9KkN mMIcTzWJKPsUHJUCMa6ZdpHsRESXVyZfJOgRyWkT3SCfLP+WuD+23QBggiJUOYhm e1kSjxxpLh3U6zFEF4St6CCIc= Received: from localhost.localdomain (unknown []) by gzsmtp5 (Coremail) with SMTP id QCgvCgDXniBxhARqrEiHDg--.29S2; Wed, 13 May 2026 22:02:27 +0800 (CST) From: wang wei To: richardycc@google.com Cc: akpm@linux-foundation.org, axboe@kernel.dk, bgeffon@google.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, liumartin@google.com, minchan@kernel.org, senozhatsky@chromium.org, stable@vger.kernel.org, wang wei Subject: [PATCH] Re:[PATCH v3] zram: fix use-after-free in zram_writeback_endio Date: Wed, 13 May 2026 22:02:18 +0800 Message-Id: <20260513140218.7425-1-a929244872@163.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260512074918.2606208-1-richardycc@google.com> References: <20260512074918.2606208-1-richardycc@google.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:QCgvCgDXniBxhARqrEiHDg--.29S2 X-Coremail-Antispam: 1Uf129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7v73 VFW2AGmfu7bjvjm3AaLaJ3UbIYCTnIWIevJa73UjIFyTuYvjTRPrcfUUUUU X-CM-SenderInfo: jdzsmjiuuylji6rwjhhfrp/xtbC6hTZgGoEhHRf4wAA3F >@@ -847,7 +849,7 @@ static void release_wb_ctl(struct zram_wb_ctl *wb_ctl) > release_wb_req(req); > } > >- kfree(wb_ctl); >+ kfree_rcu(wb_ctl, rcu); > } Do we need to add a 'rcu_assign_pointer(wb_ctl, NULL);' before 'kfree_rcu(wb_ctl, rcu)'? Signed-off-by: wang wei -- 2.25.1