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| author | Jason Gunthorpe <jgunthorpe@obsidianresearch.com> | 2009-09-05 20:23:40 -0700 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2009-09-05 20:23:40 -0700 |
| commit | 5e47596bee12597824a3b5b21e20f80b61e58a35 (patch) | |
| tree | 10e74d0c390283e6d449d3c9b171c8c689b5be0c /drivers/infiniband/ulp/ipoib/ipoib_multicast.c | |
| parent | 721d67cdca5b7642b380ca0584de8dceecf6102f (diff) | |
| download | lwn-5e47596bee12597824a3b5b21e20f80b61e58a35.tar.gz lwn-5e47596bee12597824a3b5b21e20f80b61e58a35.zip | |
IPoIB: Check multicast address format
Check that the format of multicast link addresses is correct before
taking them from dev->mc_list to priv->multicast_list. This way we
never try to send a bogus address to the SA, which prevents badness
from erronous 'ip maddr addr add', broken bonding drivers, etc.
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband/ulp/ipoib/ipoib_multicast.c')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index a0825fe451e0..25874fc680c9 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -760,6 +760,20 @@ void ipoib_mcast_dev_flush(struct net_device *dev) } } +static int ipoib_mcast_addr_is_valid(const u8 *addr, unsigned int addrlen, + const u8 *broadcast) +{ + if (addrlen != INFINIBAND_ALEN) + return 0; + /* reserved QPN, prefix, scope */ + if (memcmp(addr, broadcast, 6)) + return 0; + /* signature lower, pkey */ + if (memcmp(addr + 7, broadcast + 7, 3)) + return 0; + return 1; +} + void ipoib_mcast_restart_task(struct work_struct *work) { struct ipoib_dev_priv *priv = @@ -793,6 +807,11 @@ void ipoib_mcast_restart_task(struct work_struct *work) for (mclist = dev->mc_list; mclist; mclist = mclist->next) { union ib_gid mgid; + if (!ipoib_mcast_addr_is_valid(mclist->dmi_addr, + mclist->dmi_addrlen, + dev->broadcast)) + continue; + memcpy(mgid.raw, mclist->dmi_addr + 4, sizeof mgid); mcast = __ipoib_mcast_find(dev, &mgid); |