diff options
| author | Mark Zhang <markzhang@nvidia.com> | 2023-09-27 12:05:11 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-10 22:53:39 +0300 |
| commit | 7de0e42444e9bc18214eff4aaa04de230eb9eb3d (patch) | |
| tree | 59497aff0703af57a27d6445c88db4de87893d65 | |
| parent | 36953b4da78bc296d203a25330c3192bcad1ccd9 (diff) | |
| download | linux-7de0e42444e9bc18214eff4aaa04de230eb9eb3d.tar.xz | |
RDMA/cma: Initialize ib_sa_multicast structure to 0 when join
commit e0fe97efdb00f0f32b038a4836406a82886aec9c upstream.
Initialize the structure to 0 so that it's fields won't have random
values. For example fields like rec.traffic_class (as well as
rec.flow_label and rec.sl) is used to generate the user AH through:
cma_iboe_join_multicast
cma_make_mc_event
ib_init_ah_from_mcmember
And a random traffic_class causes a random IP DSCP in RoCEv2.
Fixes: b5de0c60cc30 ("RDMA/cma: Fix use after free race in roce multicast join")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/20230927090511.603595-1-markzhang@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/infiniband/core/cma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 805678f6fe57..0603d069de92 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -4723,7 +4723,7 @@ static int cma_iboe_join_multicast(struct rdma_id_private *id_priv, int err = 0; struct sockaddr *addr = (struct sockaddr *)&mc->addr; struct net_device *ndev = NULL; - struct ib_sa_multicast ib; + struct ib_sa_multicast ib = {}; enum ib_gid_type gid_type; bool send_only; |