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Bluetooth: hci_h5: close serdev device and free hu in h5_close 

commit 70f259a3f4 upstream.

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: https://syzkaller.appspot.com/bug?extid=6ce141c55b2f7aafd1c4
Reported-by: syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com
Tested-by: syzbot+6ce141c55b2f7aafd1c4@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Anant Thazhemadam 2020-09-30 00:28:15 +05:30 committed by Greg Kroah-Hartman
parent b726f86022
commit 18e1101b0e
1 changed files with 6 additions and 2 deletions
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8
drivers/bluetooth/hci_h5.c
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@ -250,8 +250,12 @@ 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;
}