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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-11-06 05:56:07 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-06 05:56:07 +0100 |
| commit | b4ec824021493ba6cb7eeb61572f4d2f8a80a52e (patch) | |
| tree | 17a2848c3deac1ad7efd24bfae43fb019f35cd19 /net/rose/rose_route.c | |
| parent | bridge: prevent bridging wrong device (diff) | |
| download | linux-b4ec824021493ba6cb7eeb61572f4d2f8a80a52e.tar.xz linux-b4ec824021493ba6cb7eeb61572f4d2f8a80a52e.zip | |
rose: device refcount leak
While hunting dev_put() for net-next-2.6, I found a device refcount
leak in ROSE, ioctl(SIOCADDRT) error path.
Fix is to not touch device refcount, as we hold RTNL
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rose/rose_route.c')
| -rw-r--r-- | net/rose/rose_route.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c index 9478d9b3d977..f3e21989b88c 100644 --- a/net/rose/rose_route.c +++ b/net/rose/rose_route.c @@ -578,18 +578,18 @@ static int rose_clear_routes(void) /* * Check that the device given is a valid AX.25 interface that is "up". + * called whith RTNL */ -static struct net_device *rose_ax25_dev_get(char *devname) +static struct net_device *rose_ax25_dev_find(char *devname) { struct net_device *dev; - if ((dev = dev_get_by_name(&init_net, devname)) == NULL) + if ((dev = __dev_get_by_name(&init_net, devname)) == NULL) return NULL; if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25) return dev; - dev_put(dev); return NULL; } @@ -720,27 +720,23 @@ int rose_rt_ioctl(unsigned int cmd, void __user *arg) case SIOCADDRT: if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct))) return -EFAULT; - if ((dev = rose_ax25_dev_get(rose_route.device)) == NULL) + if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL) return -EINVAL; - if (rose_dev_exists(&rose_route.address)) { /* Can't add routes to ourself */ - dev_put(dev); + if (rose_dev_exists(&rose_route.address)) /* Can't add routes to ourself */ return -EINVAL; - } if (rose_route.mask > 10) /* Mask can't be more than 10 digits */ return -EINVAL; if (rose_route.ndigis > AX25_MAX_DIGIS) return -EINVAL; err = rose_add_node(&rose_route, dev); - dev_put(dev); return err; case SIOCDELRT: if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct))) return -EFAULT; - if ((dev = rose_ax25_dev_get(rose_route.device)) == NULL) + if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL) return -EINVAL; err = rose_del_node(&rose_route, dev); - dev_put(dev); return err; case SIOCRSCLRRT: |