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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org,
	"Mark-YW.Chen" <mark-yw.chen@mediatek.com>,
	Marcel Holtmann <marcel@holtmann.org>
Subject: [PATCH 5.4 02/18] Bluetooth: btusb: fix memory leak in btusb_mtk_submit_wmt_recv_urb()
Date: Fri, 14 Jan 2022 09:16:09 +0100	[thread overview]
Message-ID: <20220114081541.543510057@linuxfoundation.org> (raw)
In-Reply-To: <20220114081541.465841464@linuxfoundation.org>

From: Mark-YW.Chen <mark-yw.chen@mediatek.com>

commit 60c6a63a3d3080a62f3e0e20084f58dbeff16748 upstream.

Driver should free `usb->setup_packet` to avoid the leak.

$ cat /sys/kernel/debug/kmemleak
unreferenced object 0xffffffa564a58080 (size 128):
    backtrace:
        [<000000007eb8dd70>] kmem_cache_alloc_trace+0x22c/0x384
        [<000000008a44191d>] btusb_mtk_hci_wmt_sync+0x1ec/0x994
    [btusb]
        [<00000000ca7189a3>] btusb_mtk_setup+0x6b8/0x13cc
    [btusb]
        [<00000000c6105069>] hci_dev_do_open+0x290/0x974
    [bluetooth]
        [<00000000a583f8b8>] hci_power_on+0xdc/0x3cc [bluetooth]
        [<000000005d80e687>] process_one_work+0x514/0xc80
        [<00000000f4d57637>] worker_thread+0x818/0xd0c
        [<00000000dc7bdb55>] kthread+0x2f8/0x3b8
        [<00000000f9999513>] ret_from_fork+0x10/0x30

Fixes: a1c49c434e150 ("Bluetooth: btusb: Add protocol support for MediaTek MT7668U USB devices")
Signed-off-by: Mark-YW.Chen <mark-yw.chen@mediatek.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/bluetooth/btusb.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2568,6 +2568,7 @@ static void btusb_mtk_wmt_recv(struct ur
 		skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
 		if (!skb) {
 			hdev->stat.err_rx++;
+			kfree(urb->setup_packet);
 			return;
 		}
 
@@ -2588,6 +2589,7 @@ static void btusb_mtk_wmt_recv(struct ur
 			data->evt_skb = skb_clone(skb, GFP_ATOMIC);
 			if (!data->evt_skb) {
 				kfree_skb(skb);
+				kfree(urb->setup_packet);
 				return;
 			}
 		}
@@ -2596,6 +2598,7 @@ static void btusb_mtk_wmt_recv(struct ur
 		if (err < 0) {
 			kfree_skb(data->evt_skb);
 			data->evt_skb = NULL;
+			kfree(urb->setup_packet);
 			return;
 		}
 
@@ -2606,6 +2609,7 @@ static void btusb_mtk_wmt_recv(struct ur
 			wake_up_bit(&data->flags,
 				    BTUSB_TX_WAIT_VND_EVT);
 		}
+		kfree(urb->setup_packet);
 		return;
 	} else if (urb->status == -ENOENT) {
 		/* Avoid suspend failed when usb_kill_urb */
@@ -2626,6 +2630,7 @@ static void btusb_mtk_wmt_recv(struct ur
 	usb_anchor_urb(urb, &data->ctrl_anchor);
 	err = usb_submit_urb(urb, GFP_ATOMIC);
 	if (err < 0) {
+		kfree(urb->setup_packet);
 		/* -EPERM: urb is being killed;
 		 * -ENODEV: device got disconnected
 		 */



  parent reply	other threads:[~2022-01-14  8:17 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-14  8:16 [PATCH 5.4 00/18] 5.4.172-rc1 review Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 01/18] workqueue: Fix unbind_workers() VS wq_worker_running() race Greg Kroah-Hartman
2022-01-14  8:16 ` Greg Kroah-Hartman [this message]
2022-01-14  8:16 ` [PATCH 5.4 03/18] Bluetooth: bfusb: fix division by zero in send path Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 04/18] USB: core: Fix bug in resuming hubs handling of wakeup requests Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 05/18] USB: Fix "slab-out-of-bounds Write" bug in usb_hcd_poll_rh_status Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 06/18] mmc: sdhci-pci: Add PCI ID for Intel ADL Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 07/18] veth: Do not record rx queue hint in veth_xmit Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 08/18] mfd: intel-lpss: Fix too early PM enablement in the ACPI ->probe() Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 09/18] drivers core: Use sysfs_emit and sysfs_emit_at for show(device *...) functions Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 10/18] can: gs_usb: fix use of uninitialized variable, detach device on reception of invalid USB data Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 11/18] can: gs_usb: gs_can_start_xmit(): zero-initialize hf->{flags,reserved} Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 12/18] random: fix data race on crng_node_pool Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 13/18] random: fix data race on crng init time Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 14/18] random: fix crash on multiple early calls to add_bootloader_randomness() Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 15/18] media: Revert "media: uvcvideo: Set unique vdev name based in type" Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 16/18] staging: wlan-ng: Avoid bitwise vs logical OR warning in hfa384x_usb_throttlefn() Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 17/18] drm/i915: Avoid bitwise vs logical OR warning in snb_wm_latency_quirk() Greg Kroah-Hartman
2022-01-14  8:16 ` [PATCH 5.4 18/18] staging: greybus: fix stack size warning with UBSAN Greg Kroah-Hartman
2022-01-14 18:09 ` [PATCH 5.4 00/18] 5.4.172-rc1 review Jon Hunter
2022-01-14 20:15 ` Florian Fainelli
2022-01-15  0:26 ` Shuah Khan
2022-01-15  6:05 ` Naresh Kamboju
2022-01-15 11:09 ` Sudip Mukherjee
2022-01-15 16:38 ` Guenter Roeck

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