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| author | Jarek Poplawski <jarkao2@gmail.com> | 2009-09-25 07:10:38 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-26 00:43:48 +0400 |
| commit | c0181d420cc1a506ca4418ce90e2ad89831eee2c (patch) | |
| tree | 2c28009e8312427a2d934352c8c1c3363941d8af | |
| parent | a91eba5b9db4c09f53c8f23327915c7c75d3235f (diff) | |
| download | linux-c0181d420cc1a506ca4418ce90e2ad89831eee2c.tar.xz | |
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>
| -rw-r--r-- | net/ax25/af_ax25.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c index d6b1b054e294..fbcac76fdc0d 100644 --- a/net/ax25/af_ax25.c +++ b/net/ax25/af_ax25.c @@ -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) |