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RDMA/rxe: Fix error unwind in rxe_create_qp() 

[ Upstream commit fd5382c580 ]

In the function rxe_create_qp(), rxe_qp_from_init() is called to
initialize qp, internally things like the spin locks are not setup until
rxe_qp_init_req().

If an error occures before this point then the unwind will call
rxe_cleanup() and eventually to rxe_qp_do_cleanup()/rxe_cleanup_task()
which will oops when trying to access the uninitialized spinlock.

Move the spinlock initializations earlier before any failures.

Fixes: 8700e3e7c4 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20220731063621.298405-1-yanjun.zhu@linux.dev
Reported-by: syzbot+833061116fa28df97f3b@syzkaller.appspotmail.com
Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhu Yanjun 2022-07-31 02:36:21 -04:00 committed by Greg Kroah-Hartman
parent 06a6d6c51e
commit 3c838ca6fb
1 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/infiniband/sw/rxe/rxe_qp.c
View File

@ -220,6 +220,14 @@ static void rxe_qp_init_misc(struct rxe_dev *rxe, struct rxe_qp *qp,
spin_lock_init(&qp->grp_lock);
spin_lock_init(&qp->state_lock);
spin_lock_init(&qp->req.task.state_lock);
spin_lock_init(&qp->resp.task.state_lock);
spin_lock_init(&qp->comp.task.state_lock);
spin_lock_init(&qp->sq.sq_lock);
spin_lock_init(&qp->rq.producer_lock);
spin_lock_init(&qp->rq.consumer_lock);
atomic_set(&qp->ssn, 0);
atomic_set(&qp->skb_out, 0);
}
@ -267,7 +275,6 @@ static int rxe_qp_init_req(struct rxe_dev *rxe, struct rxe_qp *qp,
qp->req.opcode = -1;
qp->comp.opcode = -1;
spin_lock_init(&qp->sq.sq_lock);
skb_queue_head_init(&qp->req_pkts);
rxe_init_task(rxe, &qp->req.task, qp,
@ -317,9 +324,6 @@ static int rxe_qp_init_resp(struct rxe_dev *rxe, struct rxe_qp *qp,
}
}
spin_lock_init(&qp->rq.producer_lock);
spin_lock_init(&qp->rq.consumer_lock);
skb_queue_head_init(&qp->resp_pkts);
rxe_init_task(rxe, &qp->resp.task, qp,