Commit 0ca45668 authored Jul 04, 2018 by Dan Carpenter Committed by Greg Kroah-Hartman Oct 03, 2018

IB/core: type promotion bug in rdma_rw_init_one_mr()



[ Upstream commit c2d7c8ff89b22ddefb1ac2986c0d48444a667689 ]

"nents" is an unsigned int, so if ib_map_mr_sg() returns a negative
error code then it's type promoted to a high unsigned int which is
treated as success.

Fixes: a060b562 ("IB/core: generic RDMA READ/WRITE API")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent eca85988

drivers/infiniband/core/rw.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -87,7 +87,7 @@ static int rdma_rw_init_one_mr(struct ib_qp *qp, u8 port_num,
		}

		ret = ib_map_mr_sg(reg->mr, sg, nents, &offset, PAGE_SIZE);
		if (ret < nents) {
		if (ret < 0 \|\| ret < nents) {
		ib_mr_pool_put(qp, &qp->rdma_mrs, reg->mr);
		return -EINVAL;
		}