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ax25: Fix ax25_cb refcounting in ax25_ctl_ioctl 

Use ax25_cb_put after ax25_find_cb in ax25_ctl_ioctl.

Reported-by: Bernard Pidoux F6BVP <f6bvp@free.fr>
Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Reviewed-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarek Poplawski 2009-09-25 03:10:38 +00:00 committed by David S. Miller
parent a91eba5b9d
commit c0181d420c
1 changed files with 17 additions and 10 deletions
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27
net/ax25/af_ax25.c
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@ -358,6 +358,7 @@ static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
ax25_dev *ax25_dev;
ax25_cb *ax25;
unsigned int k;
int ret = 0;
if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
return -EFAULT;
@ -388,57 +389,63 @@ static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
case AX25_WINDOW:
if (ax25->modulus == AX25_MODULUS) {
if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
return -EINVAL;
goto einval_put;
} else {
if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
return -EINVAL;
goto einval_put;
}
ax25->window = ax25_ctl.arg;
break;
case AX25_T1:
if (ax25_ctl.arg < 1)
return -EINVAL;
goto einval_put;
ax25->rtt = (ax25_ctl.arg * HZ) / 2;
ax25->t1 = ax25_ctl.arg * HZ;
break;
case AX25_T2:
if (ax25_ctl.arg < 1)
return -EINVAL;
goto einval_put;
ax25->t2 = ax25_ctl.arg * HZ;
break;
case AX25_N2:
if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
return -EINVAL;
goto einval_put;
ax25->n2count = 0;
ax25->n2 = ax25_ctl.arg;
break;
case AX25_T3:
if (ax25_ctl.arg < 0)
return -EINVAL;
goto einval_put;
ax25->t3 = ax25_ctl.arg * HZ;
break;
case AX25_IDLE:
if (ax25_ctl.arg < 0)
return -EINVAL;
goto einval_put;
ax25->idle = ax25_ctl.arg * 60 * HZ;
break;
case AX25_PACLEN:
if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
return -EINVAL;
goto einval_put;
ax25->paclen = ax25_ctl.arg;
break;
default:
return -EINVAL;
goto einval_put;
}
return 0;
out_put:
ax25_cb_put(ax25);
return ret;
einval_put:
ret = -EINVAL;
goto out_put;
}
static void ax25_fillin_cb_from_dev(ax25_cb *ax25, ax25_dev *ax25_dev)