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mkiss: Fix error handling in mkiss_open()

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If register_netdev() fails we are not propagating the error and
we return success because ax_open() succeeded previously.

Fix this by checking the return value of ax_open() and
register_netdev() and propagate the error in case of failure.

Reported-by: RUC_Soft_Sec <zy900702@163.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Fabio Estevam 2015-08-10 14:22:43 -03:00 committed by David S. Miller
parent 182554570a
commit 9d332d92a9
1 changed files with 4 additions and 3 deletions
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7
drivers/net/hamradio/mkiss.c
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@ -728,11 +728,12 @@ static int mkiss_open(struct tty_struct *tty)
dev->type = ARPHRD_AX25;
/* Perform the low-level AX25 initialization. */
if ((err = ax_open(ax->dev))) {
err = ax_open(ax->dev);
if (err)
goto out_free_netdev;
}
if (register_netdev(dev))
err = register_netdev(dev);
if (err)
goto out_free_buffers;
/* after register_netdev() - because else printk smashes the kernel */