From: Anant Thazhemadam anant.thazhemadam@gmail.com
commit 70f259a3f4276b71db365b1d6ff1eab805ea6ec3 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
--- drivers/bluetooth/hci_h5.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/bluetooth/hci_h5.c +++ b/drivers/bluetooth/hci_h5.c @@ -251,8 +251,12 @@ 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; }