[PATCH 5.12 005/127] RDMA/siw: Properly check send and receive CQ pointers

Greg Kroah-Hartman
2021-05-24T16:01:53Z

From: Leon Romanovsky <leonro@nvidia.com>

[ Upstream commit a568814a55a0e82bbc7c7b51333d0c38e8fb5520 ]

The check for the NULL of pointer received from container_of() is
incorrect by definition as it points to some offset from NULL.

Change such check with proper NULL check of SIW QP attributes.

Fixes: 303ae1cdfdf7 ("rdma/siw: application interface")
Link: https://lore.kernel.org/r/a7535a82925f6f4c1f062abaa294f3ae6e54bdd2.1620560310.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Bernard Metzler <bmt@zurich.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/sw/siw/siw_verbs.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c
index e389d44e5591..d1859c56a6db 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.c
+++ b/drivers/infiniband/sw/siw/siw_verbs.c
@@ -300,7 +300,6 @@ struct ib_qp *siw_create_qp(struct ib_pd *pd,
struct siw_ucontext *uctx =
rdma_udata_to_drv_context(udata, struct siw_ucontext,
base_ucontext);
- struct siw_cq *scq = NULL, *rcq = NULL;
unsigned long flags;
int num_sqe, num_rqe, rv = 0;
size_t length;
@@ -343,10 +342,8 @@ struct ib_qp *siw_create_qp(struct ib_pd *pd,
rv = -EINVAL;
goto err_out;
}
- scq = to_siw_cq(attrs->send_cq);
- rcq = to_siw_cq(attrs->recv_cq);

- if (!scq || (!rcq && !attrs->srq)) {
+ if (!attrs->send_cq || (!attrs->recv_cq && !attrs->srq)) {
siw_dbg(base_dev, "send CQ or receive CQ invalid\n");
rv = -EINVAL;
goto err_out;
@@ -401,8 +398,8 @@ struct ib_qp *siw_create_qp(struct ib_pd *pd,
}
}
qp->pd = pd;
- qp->scq = scq;
- qp->rcq = rcq;
+ qp->scq = to_siw_cq(attrs->send_cq);
+ qp->rcq = to_siw_cq(attrs->recv_cq);

if (attrs->srq) {
/*
--
2.30.2