diff options
| author | Sjur Braendeland <sjur.brandeland@stericsson.com> | 2010-04-28 08:54:34 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-28 12:55:10 -0700 |
| commit | d3f744e0d6c1c27a10cdceac6eb946122188dbc9 (patch) | |
| tree | 29ea75a920eba781d617c4e1ef30298952a73d27 /drivers/net/caif/caif_serial.c | |
| parent | a4900ac9f7d10ad062e54dd03125e3619e0ac17a (diff) | |
caif: Ldisc add permission check and mem-alloc error check
Changes:
o Added permission checks for installing. CAP_SYS_ADMIN and
CAP_SYS_TTY_CONFIG can install the ldisc.
o Check if allocation of skb was successful.
Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/caif/caif_serial.c')
| -rw-r--r-- | drivers/net/caif/caif_serial.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/caif/caif_serial.c b/drivers/net/caif/caif_serial.c index 38c0186cfbc..09257ca8f56 100644 --- a/drivers/net/caif/caif_serial.c +++ b/drivers/net/caif/caif_serial.c @@ -197,7 +197,8 @@ static void ldisc_receive(struct tty_struct *tty, const u8 *data, /* Get a suitable caif packet and copy in data. */ skb = netdev_alloc_skb(ser->dev, count+1); - BUG_ON(skb == NULL); + if (skb == NULL) + return; p = skb_put(skb, count); memcpy(p, data, count); @@ -315,6 +316,8 @@ static int ldisc_open(struct tty_struct *tty) /* No write no play */ if (tty->ops->write == NULL) return -EOPNOTSUPP; + if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_TTY_CONFIG)) + return -EPERM; sprintf(name, "cf%s", tty->name); dev = alloc_netdev(sizeof(*ser), name, caifdev_setup); |