From: Michael Guralnik michaelgur@nvidia.com
[ Upstream commit 27cfde795a96aef1e859a5480489944b95421e46 ]
Fix the order of source and destination addresses when resolving the route between server and client to validate use of correct net device.
The reverse order we had so far didn't actually validate the net device as the server would try to resolve the route to itself, thus always getting the server's net device.
The issue was discovered when running cm applications on a single host between 2 interfaces with same subnet and source based routing rules. When resolving the reverse route the source based route rules were ignored.
Fixes: f887f2ac87c2 ("IB/cma: Validate routing of incoming requests") Link: https://lore.kernel.org/r/1c1ec2277a131d277ebcceec987fd338d35b775f.166125187... Signed-off-by: Michael Guralnik michaelgur@nvidia.com Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/core/cma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 3c40aa50cd60c..b5fa19a033c0a 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -1722,8 +1722,8 @@ cma_ib_id_from_event(struct ib_cm_id *cm_id, }
if (!validate_net_dev(*net_dev, - (struct sockaddr *)&req->listen_addr_storage, - (struct sockaddr *)&req->src_addr_storage)) { + (struct sockaddr *)&req->src_addr_storage, + (struct sockaddr *)&req->listen_addr_storage)) { id_priv = ERR_PTR(-EHOSTUNREACH); goto err; }