From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 323E519DF9D; Thu, 3 Oct 2024 14:28:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727965734; cv=none; b=XkylLRZIuJo3fCBX8Vm2PrcoMSSzTlBTVcCv6VxLCgHFrypvl/fj48Y63rdaZXCD6Z10Xbtqv5WOHxJBWHP3AY2C0Fd5LdQcAvLLgSCzTdNfvMlVAPE9KhBUL2SYfN17aFp7v3o2H5yMjUCUE2MuRhYB5XRRAxq9HnciLHU2UH4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727965734; c=relaxed/simple; bh=Kb0x/26TYRqZxPb6qmWEVa8XyqmU83s/wqbgbkI7LC4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RsvJ+DeaIFDZLxL//isEsYQcguJ6wwGrokYdHvTL/IwqB/EgsrjJlY4ZPqGkBP/25jq6HJEOtGXy7pM8wn08TOMdgCbd8TLXSVcW7JZPrvTkrVdmAyYHprVeOEbbi4ALby57AoAdmqQAE+W0kpcJBkRrW32KFRchrpdBfZBOsoY= 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=N2cZys8M; arc=none smtp.client-ip=117.135.210.5 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="N2cZys8M" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:Message-ID:MIME-Version: Content-Type; bh=//iRvm/yY0slAVRPzkdXEEZUm5gMFFVlQPK3B3aedpg=; b=N2cZys8MQfE4O+wiuE6GlTsexCz4RhcmDMSWkDU7mzYbqfdqsmRJ07E3XxIs5B XLxwL6k4vQxQUcvvryhA9PRjNp3FrSU1OJcYGQRJ+J937XEDeUnDI8RCH/JK2OhK WxwmRxJ2sLH/IStgqaLE9d8RzJOCw/2RpJ64wWvoJDr5I= Received: from localhost (unknown [36.5.132.7]) by gzga-smtp-mtada-g0-0 (Coremail) with SMTP id _____wD3_68Oqv5m4qIvAw--.58153S2; Thu, 03 Oct 2024 22:28:30 +0800 (CST) Date: Thu, 3 Oct 2024 22:28:29 +0800 From: Qianqiang Liu To: syzbot Cc: johan.hedberg@gmail.com, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, luiz.dentz@gmail.com, marcel@holtmann.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [bluetooth?] KASAN: slab-use-after-free Read in set_powered_sync Message-ID: References: <000000000000932e45061d45f6e8@google.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000932e45061d45f6e8@google.com> X-CM-TRANSID:_____wD3_68Oqv5m4qIvAw--.58153S2 X-Coremail-Antispam: 1Uf129KBjvdXoW7GrW5uF1UKF4kZFykJrW5KFg_yoWxZFb_WF 1Ivay7Wr15CFWYqFsFkF17ZFWkAFySgF1xC3yjvrW8K3sIga1DAr47ZFn5Ary5uwsrA3W3 Crn8XFySyrWUKjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRRknY3UUUUU== X-CM-SenderInfo: xtld01pldqwhxolxqiywtou0bp/1tbiYBRtamb+n-aA-gAAs8 #syz test diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c index 5533e6f561b3..259b18eb0b20 100644 --- a/net/bluetooth/hci_sync.c +++ b/net/bluetooth/hci_sync.c @@ -5187,8 +5187,11 @@ int hci_dev_close_sync(struct hci_dev *hdev) auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF); if (!auto_off && !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && - hci_dev_test_flag(hdev, HCI_MGMT)) + hci_dev_test_flag(hdev, HCI_MGMT)) { + hci_req_sync_lock(hdev); __mgmt_power_off(hdev); + hci_req_sync_unlock(hdev); + } hci_inquiry_cache_flush(hdev); hci_pend_le_actions_clear(hdev); -- Best, Qianqiang Liu