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| author | Thadeu Lima de Souza Cascardo <cascardo@canonical.com> | 2021-09-22 08:56:56 -0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2021-09-22 16:14:21 +0200 |
| commit | c05731d0c6bd9a625e27ea5c5157ebf1303229e0 (patch) | |
| tree | 8db1fda90e62e2f0c2f1090f0cd1b11d0196af35 /drivers | |
| parent | 24ff62ae383f776ab0285f2996de6bd9bb2d2e4b (diff) | |
| download | linux-stable-c05731d0c6bd9a625e27ea5c5157ebf1303229e0.tar.gz linux-stable-c05731d0c6bd9a625e27ea5c5157ebf1303229e0.tar.bz2 linux-stable-c05731d0c6bd9a625e27ea5c5157ebf1303229e0.zip | |
Bluetooth: hci_ldisc: require CAP_NET_ADMIN to attach N_HCI ldisc
Any unprivileged user can attach N_HCI ldisc and send packets coming from a
virtual controller by using PTYs.
Require initial namespace CAP_NET_ADMIN to do that.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/bluetooth/hci_ldisc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c index 5ed2cfa7da1d..5e32e4d5367a 100644 --- a/drivers/bluetooth/hci_ldisc.c +++ b/drivers/bluetooth/hci_ldisc.c @@ -479,6 +479,9 @@ static int hci_uart_tty_open(struct tty_struct *tty) BT_DBG("tty %p", tty); + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + /* Error if the tty has no write op instead of leaving an exploitable * hole */ |