diff options
| author | Wissam Shoukair | 2015-08-12 11:28:58 +0200 |
|---|---|---|
| committer | Michael Brown | 2015-08-17 15:42:36 +0200 |
| commit | eb8df9a0466078f083822e5ef2fb16713c94d25c (patch) | |
| tree | f42ae5a6ad32a2e1a04139894cece0c0dc3c3a67 /src/net/infiniband | |
| parent | [peerdist] Add support for PeerDist (aka BranchCache) HTTP content encoding (diff) | |
| download | ipxe-eb8df9a0466078f083822e5ef2fb16713c94d25c.tar.gz ipxe-eb8df9a0466078f083822e5ef2fb16713c94d25c.tar.xz ipxe-eb8df9a0466078f083822e5ef2fb16713c94d25c.zip | |
[ipoib] Fix a race when chain-loading undionly.kpxe in IPoIB
The Infiniband link status change callback ipoib_link_state_changed()
may be called while the IPoIB device is closed, in which case there
will not be an IPoIB queue pair to be joined to the IPv4 broadcast
group. This leads to NULL pointer dereferences in ib_mcast_attach()
and ib_mcast_detach().
Fix by not attempting to join (or leave) the broadcast group unless we
actually have an IPoIB queue pair.
Signed-off-by: Wissam Shoukair <wissams@mellanox.com>
Modified-by: Michael Brown <mcb30@ipxe.org>
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/net/infiniband')
| -rw-r--r-- | src/net/infiniband/ib_mcast.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/net/infiniband/ib_mcast.c b/src/net/infiniband/ib_mcast.c index 02369269..fc4ff7f0 100644 --- a/src/net/infiniband/ib_mcast.c +++ b/src/net/infiniband/ib_mcast.c @@ -150,6 +150,9 @@ int ib_mcast_join ( struct ib_device *ibdev, struct ib_queue_pair *qp, DBGC ( ibdev, "IBDEV %p QPN %lx joining " IB_GID_FMT "\n", ibdev, qp->qpn, IB_GID_ARGS ( gid ) ); + /* Sanity check */ + assert ( qp != NULL ); + /* Initialise structure */ membership->qp = qp; memcpy ( &membership->gid, gid, sizeof ( membership->gid ) ); @@ -199,6 +202,9 @@ void ib_mcast_leave ( struct ib_device *ibdev, struct ib_queue_pair *qp, DBGC ( ibdev, "IBDEV %p QPN %lx leaving " IB_GID_FMT "\n", ibdev, qp->qpn, IB_GID_ARGS ( gid ) ); + /* Sanity check */ + assert ( qp != NULL ); + /* Detach from multicast GID */ ib_mcast_detach ( ibdev, qp, &membership->gid ); |