From: <mark-yw.chen@mediatek.com>
To: <marcel@holtmann.org>, <johan.hedberg@gmail.com>
Cc: <mark-yw.chen@mediatek.com>, <will-cy.lee@mediatek.com>,
<linux-bluetooth@vger.kernel.org>,
<linux-mediatek@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH] Bluetooth: btusb: fix memory leak in btusb_mtk_submit_wmt_recv_urb()
Date: Thu, 14 Oct 2021 00:22:04 +0800 [thread overview]
Message-ID: <20211013162204.13919-1-mark-yw.chen@mediatek.com> (raw)
From: Mark-YW.Chen <mark-yw.chen@mediatek.com>
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
Signed-off-by: Mark-YW.Chen <mark-yw.chen@mediatek.com>
---
drivers/bluetooth/btusb.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 75c83768c257..1bfcbcabc7d3 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2265,6 +2265,7 @@ static void btusb_mtk_wmt_recv(struct urb *urb)
skb = bt_skb_alloc(HCI_WMT_MAX_EVENT_SIZE, GFP_ATOMIC);
if (!skb) {
hdev->stat.err_rx++;
+ kfree(urb->setup_packet);
return;
}
@@ -2285,6 +2286,7 @@ static void btusb_mtk_wmt_recv(struct urb *urb)
data->evt_skb = skb_clone(skb, GFP_ATOMIC);
if (!data->evt_skb) {
kfree_skb(skb);
+ kfree(urb->setup_packet);
return;
}
}
@@ -2293,6 +2295,7 @@ static void btusb_mtk_wmt_recv(struct urb *urb)
if (err < 0) {
kfree_skb(data->evt_skb);
data->evt_skb = NULL;
+ kfree(urb->setup_packet);
return;
}
@@ -2303,6 +2306,7 @@ static void btusb_mtk_wmt_recv(struct urb *urb)
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 */
@@ -2323,6 +2327,7 @@ static void btusb_mtk_wmt_recv(struct urb *urb)
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
*/
--
2.18.0
next reply other threads:[~2021-10-13 16:22 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 16:22 mark-yw.chen [this message]
2021-10-13 16:32 ` [PATCH] Bluetooth: btusb: fix memory leak in btusb_mtk_submit_wmt_recv_urb() Marcel Holtmann
2021-10-13 17:26 ` bluez.test.bot
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