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* [Linux-kernel-mentees] [PATCH v2] bluetooth: hci_h5: close serdev device and free hu in h5_close
@ 2020-10-01 19:43 Anant Thazhemadam
  2020-10-02 10:22 ` Hans de Goede
  2020-10-04  5:17 ` [Linux-kernel-mentees] [PATCH v3] bluetooth: hci_h5: fix memory leak " Anant Thazhemadam
  0 siblings, 2 replies; 8+ messages in thread
From: Anant Thazhemadam @ 2020-10-01 19:43 UTC (permalink / raw)
  Cc: Anant Thazhemadam, syzbot+6ce141c55b2f7aafd1c4, Johan Hedberg,
	linux-bluetooth, Marcel Holtmann, linux-kernel, Hans de Goede,
	linux-kernel-mentees

When h5_close() gets called, the memory allocated for the hu gets 
freed only if hu->serdev doesn't exist. This leads to a memory leak.
So when h5_close() is requested, close the serdev device instance and
free the memory allocated to the hu entirely instead.

Fixes: ce945552fde4 ("Bluetooth: hci_h5: Add support for serdev enumerated devices")
Reported-by: syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com
Tested-by: syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
---
Changes in v2:
	* Fixed the Fixes tag

 drivers/bluetooth/hci_h5.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index e41854e0d79a..3d1585add572 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -248,8 +248,12 @@ static int h5_close(struct hci_uart *hu)
 	if (h5->vnd && h5->vnd->close)
 		h5->vnd->close(h5);
 
-	if (!hu->serdev)
-		kfree(h5);
+	if (hu->serdev)
+		serdev_device_close(hu->serdev);
+
+	kfree_skb(h5->rx_skb);
+	kfree(h5);
+	h5 = NULL;
 
 	return 0;
 }
-- 
2.25.1

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^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2020-10-06  6:30 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-10-01 19:43 [Linux-kernel-mentees] [PATCH v2] bluetooth: hci_h5: close serdev device and free hu in h5_close Anant Thazhemadam
2020-10-02 10:22 ` Hans de Goede
2020-10-02 10:55   ` Anant Thazhemadam
2020-10-03 22:07   ` Anant Thazhemadam
2020-10-04  5:17 ` [Linux-kernel-mentees] [PATCH v3] bluetooth: hci_h5: fix memory leak " Anant Thazhemadam
2020-10-05  9:18   ` Hans de Goede
2020-10-06  2:44     ` Anant Thazhemadam
2020-10-06  6:30       ` Hans de Goede

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