From: Andy King <[email protected]>

Check for a valid queuepair ptr before trying to lock the queuepair (which will
deref it).

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Andy King <[email protected]>
Signed-off-by: Dmitry Torokhov <[email protected]>
---
 drivers/misc/vmw_vmci/vmci_queue_pair.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c 
b/drivers/misc/vmw_vmci/vmci_queue_pair.c
index da47e45..6417a26 100644
--- a/drivers/misc/vmw_vmci/vmci_queue_pair.c
+++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c
@@ -3355,11 +3355,11 @@ ssize_t vmci_qpair_dequev(struct vmci_qp *qpair,
 {
        ssize_t result;
 
-       qp_lock(qpair);
-
        if (!qpair || !iov)
                return VMCI_ERROR_INVALID_ARGS;
 
+       qp_lock(qpair);
+
        do {
                result = qp_dequeue_locked(qpair->produce_q,
                                           qpair->consume_q,
-- 
1.7.4.1

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