From: Leon Romanovsky <leon@kernel.org>
To: Doug Ledford <dledford@redhat.com>, Jason Gunthorpe <jgg@mellanox.com>
Cc: Leon Romanovsky <leonro@mellanox.com>,
RDMA mailing list <linux-rdma@vger.kernel.org>,
Sean Hefty <sean.hefty@intel.com>
Subject: [PATCH rdma-next] RDMA/ucma: Protect kernel from QPN larger than declared in IBTA
Date: Mon, 28 Oct 2019 15:44:44 +0200 [thread overview]
Message-ID: <20191028134444.25537-1-leon@kernel.org> (raw)
From: Leon Romanovsky <leonro@mellanox.com>
IBTA declares QPN as 24bits, mask input to ensure that kernel
doesn't get higher bits.
Fixes: 75216638572f ("RDMA/cma: Export rdma cm interface to userspace")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
* Not fully tested yet, passed sanity tests for now.
---
drivers/infiniband/core/ucma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index 0274e9b704be..57e68491a2fd 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -1045,7 +1045,7 @@ static void ucma_copy_conn_param(struct rdma_cm_id *id,
dst->retry_count = src->retry_count;
dst->rnr_retry_count = src->rnr_retry_count;
dst->srq = src->srq;
- dst->qp_num = src->qp_num;
+ dst->qp_num = src->qp_num & 0xFFFFFF;
dst->qkey = (id->route.addr.src_addr.ss_family == AF_IB) ? src->qkey : 0;
}
--
2.20.1
next reply other threads:[~2019-10-28 13:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-28 13:44 Leon Romanovsky [this message]
2019-10-28 13:45 ` [PATCH rdma-next] RDMA/ucma: Protect kernel from QPN larger than declared in IBTA Jason Gunthorpe
2019-10-28 13:57 ` Leon Romanovsky
2019-10-28 15:09 ` Hefty, Sean
2019-10-28 15:26 ` Leon Romanovsky
2019-10-31 19:05 ` Jason Gunthorpe
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