tty: n_gsm: require CAP_NET_ADMIN to attach N_GSM0710 ldisc
commit 67c3775689
upstream.
Any unprivileged user can attach N_GSM0710 ldisc, but it requires
CAP_NET_ADMIN to create a GSM network anyway.
Require initial namespace CAP_NET_ADMIN to do that.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Link: https://lore.kernel.org/r/20230731185942.279611-1-cascardo@canonical.com
Cc: Salvatore Bonaccorso <carnil@debian.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
6cbbe1ba76
commit
2d154a54c5
|
@ -2827,6 +2827,9 @@ static int gsmld_open(struct tty_struct *tty)
|
|||
{
|
||||
struct gsm_mux *gsm;
|
||||
|
||||
if (!capable(CAP_NET_ADMIN))
|
||||
return -EPERM;
|
||||
|
||||
if (tty->ops->write == NULL)
|
||||
return -EINVAL;
|
||||
|
||||
|
|
Loading…
Reference in New Issue