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From: Miao-chen Chou <mcchou@chromium.org>
To: Bluetooth Kernel Mailing List <linux-bluetooth@vger.kernel.org>
Cc: Marcel Holtmann <marcel@holtmann.org>,
	Alain Michaud <alainm@chromium.org>,
	pavel@ucw.cz, Miao-chen Chou <mcchou@chromium.org>,
	Abhishek Pandit-Subedi <abhishekpandit@chromium.org>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Johan Hedberg <johan.hedberg@gmail.com>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH v1] Bluetooth: Fix kernel oops triggered by hci_adv_monitors_clear()
Date: Mon, 29 Jun 2020 20:15:00 -0700
Message-ID: <20200629201441.v1.1.I162e3c6c4f4d963250c37733c3428329110c5989@changeid> (raw)

This fixes the kernel oops by removing unnecessary background scan
update from hci_adv_monitors_clear() which shouldn't invoke any work
queue.

The following test was performed.
- Run "rmmod btusb" and verify that no kernel oops is triggered.

Signed-off-by: Miao-chen Chou <mcchou@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
---

 net/bluetooth/hci_core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 5577cf9e2c7cd..77615161c7d72 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3005,8 +3005,6 @@ void hci_adv_monitors_clear(struct hci_dev *hdev)
 		hci_free_adv_monitor(monitor);
 
 	idr_destroy(&hdev->adv_monitors_idr);
-
-	hci_update_background_scan(hdev);
 }
 
 void hci_free_adv_monitor(struct adv_monitor *monitor)
-- 
2.26.2


             reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-30  3:15 Miao-chen Chou [this message]
2020-06-30  6:51 ` Marcel Holtmann
2020-06-30 21:55   ` Miao-chen Chou
2020-07-06 21:05     ` Miao-chen Chou
2020-07-07 15:38 ` Marcel Holtmann
2020-07-12  7:46   ` Pavel Machek

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