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Message-Id: <20220614021040.1101131-10-sashal@kernel.org>
Date: Mon, 13 Jun 2022 22:10:38 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Xiaohui Zhang <xiaohuizhang@....edu.cn>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
Jakub Kicinski <kuba@...nel.org>,
Sasha Levin <sashal@...nel.org>, lauro.venancio@...nbossa.org,
aloisio.almeida@...nbossa.org, sameo@...ux.intel.com,
linux-wireless@...r.kernel.org
Subject: [PATCH AUTOSEL 4.9 10/12] nfc: nfcmrvl: Fix memory leak in nfcmrvl_play_deferred
From: Xiaohui Zhang <xiaohuizhang@....edu.cn>
[ Upstream commit 8a4d480702b71184fabcf379b80bf7539716752e ]
Similar to the handling of play_deferred in commit 19cfe912c37b
("Bluetooth: btusb: Fix memory leak in play_deferred"), we thought
a patch might be needed here as well.
Currently usb_submit_urb is called directly to submit deferred tx
urbs after unanchor them.
So the usb_giveback_urb_bh would failed to unref it in usb_unanchor_urb
and cause memory leak.
Put those urbs in tx_anchor to avoid the leak, and also fix the error
handling.
Signed-off-by: Xiaohui Zhang <xiaohuizhang@....edu.cn>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Link: https://lore.kernel.org/r/20220607083230.6182-1-xiaohuizhang@ruc.edu.cn
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/nfc/nfcmrvl/usb.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/nfc/nfcmrvl/usb.c b/drivers/nfc/nfcmrvl/usb.c
index 585a0f20835b..3263e2a2bdfd 100644
--- a/drivers/nfc/nfcmrvl/usb.c
+++ b/drivers/nfc/nfcmrvl/usb.c
@@ -401,13 +401,25 @@ static void nfcmrvl_play_deferred(struct nfcmrvl_usb_drv_data *drv_data)
int err;
while ((urb = usb_get_from_anchor(&drv_data->deferred))) {
+ usb_anchor_urb(urb, &drv_data->tx_anchor);
+
err = usb_submit_urb(urb, GFP_ATOMIC);
- if (err)
+ if (err) {
+ kfree(urb->setup_packet);
+ usb_unanchor_urb(urb);
+ usb_free_urb(urb);
break;
+ }
drv_data->tx_in_flight++;
+ usb_free_urb(urb);
+ }
+
+ /* Cleanup the rest deferred urbs. */
+ while ((urb = usb_get_from_anchor(&drv_data->deferred))) {
+ kfree(urb->setup_packet);
+ usb_free_urb(urb);
}
- usb_scuttle_anchored_urbs(&drv_data->deferred);
}
static int nfcmrvl_resume(struct usb_interface *intf)
--
2.35.1
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