diff options
| -rw-r--r-- | drivers/tty/n_gsm.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index c42c8b89fd46..b411a26cc092 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -42,6 +42,7 @@ #include <linux/ctype.h> #include <linux/mm.h> #include <linux/math.h> +#include <linux/nospec.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/poll.h> @@ -3717,8 +3718,8 @@ static int gsmld_ioctl(struct tty_struct *tty, unsigned int cmd, struct gsm_config_ext ce; struct gsm_dlci_config dc; struct gsm_mux *gsm = tty->disc_data; + unsigned int base, addr; struct gsm_dlci *dlci; - unsigned int base; switch (cmd) { case GSMIOC_GETCONF: @@ -3747,9 +3748,10 @@ static int gsmld_ioctl(struct tty_struct *tty, unsigned int cmd, return -EFAULT; if (dc.channel == 0 || dc.channel >= NUM_DLCI) return -EINVAL; - dlci = gsm->dlci[dc.channel]; + addr = array_index_nospec(dc.channel, NUM_DLCI); + dlci = gsm->dlci[addr]; if (!dlci) { - dlci = gsm_dlci_alloc(gsm, dc.channel); + dlci = gsm_dlci_alloc(gsm, addr); if (!dlci) return -ENOMEM; } @@ -3762,9 +3764,10 @@ static int gsmld_ioctl(struct tty_struct *tty, unsigned int cmd, return -EFAULT; if (dc.channel == 0 || dc.channel >= NUM_DLCI) return -EINVAL; - dlci = gsm->dlci[dc.channel]; + addr = array_index_nospec(dc.channel, NUM_DLCI); + dlci = gsm->dlci[addr]; if (!dlci) { - dlci = gsm_dlci_alloc(gsm, dc.channel); + dlci = gsm_dlci_alloc(gsm, addr); if (!dlci) return -ENOMEM; } |