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-rw-r--r--drivers/tty/n_gsm.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 6b6abce6b..d2daf0a72 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2969,6 +2969,9 @@ 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;