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authorWang Chen <wangchen@cn.fujitsu.com>2008-07-14 20:54:23 -0700
committerDavid S. Miller <davem@davemloft.net>2008-07-14 20:54:23 -0700
commit5ae7b444137143a4e067b80354171ab128eb1b2b (patch)
tree5a903c02c26d186d2ed95d81152ee28c5e2daaa3 /net/ipv6/ip6mr.c
parentbc3f9076f671f128c82022428992c30be57f22d5 (diff)
ipv6: Check return of dev_set_allmulti
allmulti might overflow. Commit: "netdevice: Fix promiscuity and allmulti overflow" in net-next makes dev_set_promiscuity/allmulti return error number if overflow happened. Here, we check the positive increment for allmulti to get error return. Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6mr.c')
-rw-r--r--net/ipv6/ip6mr.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index cfac26d674ed..2dd832592a31 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -595,6 +595,7 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock)
int vifi = vifc->mif6c_mifi;
struct mif_device *v = &vif6_table[vifi];
struct net_device *dev;
+ int err;
/* Is vif busy ? */
if (MIF_EXISTS(vifi))
@@ -612,6 +613,11 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock)
dev = ip6mr_reg_vif();
if (!dev)
return -ENOBUFS;
+ err = dev_set_allmulti(dev, 1);
+ if (err) {
+ unregister_netdevice(dev);
+ return err;
+ }
break;
#endif
case 0:
@@ -619,13 +625,14 @@ static int mif6_add(struct mif6ctl *vifc, int mrtsock)
if (!dev)
return -EADDRNOTAVAIL;
dev_put(dev);
+ err = dev_set_allmulti(dev, 1);
+ if (err)
+ return err;
break;
default:
return -EINVAL;
}
- dev_set_allmulti(dev, 1);
-
/*
* Fill in the VIF structures
*/