AcoSail/kernel_optimize_test
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caif: Ldisc add permission check and mem-alloc error check

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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>
This commit is contained in:
Sjur Braendeland 2010-04-28 08:54:34 +00:00 committed by David S. Miller
parent a4900ac9f7
commit d3f744e0d6
1 changed files with 4 additions and 1 deletions
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5
drivers/net/caif/caif_serial.c
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@ -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);