From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=202.108.3.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792979990; b=n/GsRby2m4JM7jmKPaKKl2gG3IMPvbkB/qAi5ActVF/CbdiN9thubZL+e7n0b5qZAOKD yAgXDG+kON75xEm8ebzNPqgEMt6nWnZlFiq9l0znaJRFzjDKjtRmyLnOm9pdX6HiTm4Wn 3kuVCzD1VACemzTG+SYBcZZcHcQMk50jbsXwRC1+t/qjeohpwlGQNCMAoQvidMIGh/SW4 yHq9b0cJJB4REzfBWTy09fkFuOLhe2YSnG278VPoKGgsmutmGHGA0+6pp+9xrrW4FO+Sz ejyaJatFQusy+paifyGY4MxDaljIbmgaeFDPhZEFtFewWMLvzDVkhmg28/AgZ4ugizQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792979990; h=DMARC-Filter:DKIM-Signature:X-SMAIL-HELO:Received:X-Sender:X-Auth-ID: X-SMAIL-MID:X-SMAIL-UIID:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=iSbhqqfG3e76ofxeSYQhozA0asyEhHmy1/0BG1qOveA=; b=xjFXtOn33vRkh8jim59Y0XpblhzC0/FoFC74st8Eo/esTQmzU5ZafpUnMd9tq288kN5l xoa6Z8w4XSfqaBCu/4msouRSIxYXYgiLwEwC8y+eYRVV555/ZFvNlB9sKZujYHR0fnUQ1 GBRWhpj72Cwb0LdU/YjGmxCACEeK1h60WWfmBj9+/+onWxoTTTPuKK4SbYkaQmjapI4AW j6lxQdE+0dvfHZ1HOFGx6bYi5qtOXJTdRJV3Kjat5i1YJR9yS6KmjixQ/B8Yim+VU9ZPu DU3qwTYiyfJ5+qn01gqRlhe599ZZhvxx8wOdr91xwBw7ChhkHft2K/a8tviNcEMg/mw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=sina.com; spf=pass smtp.mailfrom=sina.com; dkim=pass header.d=sina.com header.i=@sina.com header.a=rsa-sha256 header.s=201208 header.b=nsMj95tB; arc=none smtp.remote-ip=202.108.3.18 Received: from r3-18.sinamail.sina.com.cn (r3-18.sinamail.sina.com.cn [202.108.3.18]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B86CF606A31B for ; Mon, 26 Oct 2026 01:59:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org B86CF606A31B Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=sina.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sina.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=sina.com header.i=@sina.com header.a=rsa-sha256 header.s=201208 header.b=nsMj95tB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sina.com; s=201208; t=1792979988; bh=iSbhqqfG3e76ofxeSYQhozA0asyEhHmy1/0BG1qOveA=; h=From:Subject:Date:Message-ID; b=nsMj95tBEgMzhlmZZcUl7A/Z/5KfNIsWG92kkYmYPKEd8xSQSNXrLkSlrdLqU6KL7 7CtnvTcq/tfMrLhTy1x2suyqufQnhdoi6MbrYooNteby9hCYxpdkRC0pqqjQMY/Fvb 6VSKO7X7zRG028vpyYOLfmTYXIni+CvkvH6axDEs= X-SMAIL-HELO: lxu-ped-host.. Received: from unknown (HELO lxu-ped-host..)([111.198.231.89]) by sina.com (10.54.253.32) with ESMTP id 6ADEB40E0000266A; Mon, 26 Oct 2026 09:59:43 +0800 (CST) X-Sender: eadavis@sina.com X-Auth-ID: eadavis@sina.com Authentication-Results: sina.com; spf=none smtp.mailfrom=eadavis@sina.com; dkim=none header.i=none; dmarc=none action=none header.from=eadavis@sina.com X-SMAIL-MID: 7312134456600 X-SMAIL-UIID: 9A0143A573B346929E6AC1560BFC77B7-20261026-095943-1 From: Edward Adam Davis To: syzbot+a2626a25eb2595e3ec3c@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [dm?] KASAN: null-ptr-deref Read in dm_kcopyd_client_destroy Date: Mon, 26 Oct 2026 09:59:42 +0800 Message-ID: <20261026015942.167369-1-eadavis@sina.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <6addec28.412b1182.196980.00aa.GAE@google.com> References: <6addec28.412b1182.196980.00aa.GAE@google.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Edward Aadm Davis #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 4169c9c90532 diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 1a5072425c4a..b562bf59124c 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -2544,6 +2544,7 @@ static int cache_create(struct cache_args *ca, struct cache **result) if (IS_ERR(cache->copier)) { *error = "could not create kcopyd client"; r = PTR_ERR(cache->copier); + cache->copier = NULL; goto bad; }