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rapidio: fix a NULL pointer dereference when create_workqueue() fails

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In case create_workqueue fails, the fix releases resources and returns
-ENOMEM to avoid NULL pointer dereference.

Signed-off-by: Kangjie Lu <[email protected]>
Acked-by: Alexandre Bounine <[email protected]>
Cc: Matt Porter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Kangjie Lu 2019-05-14 15:44:49 -07:00 • committed by Linus Torvalds
commit 23015b22e4
1 changed files with 8 additions and 0 deletions
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8
drivers/rapidio/rio_cm.c
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@ -2147,6 +2147,14 @@ static int riocm_add_mport(struct device *dev,
mutex_init(&cm->rx_lock);
riocm_rx_fill(cm, RIOCM_RX_RING_SIZE);
cm->rx_wq = create_workqueue(DRV_NAME "/rxq");
if (!cm->rx_wq) {
riocm_error("failed to allocate IBMBOX_%d on %s",
cmbox, mport->name);
rio_release_outb_mbox(mport, cmbox);
kfree(cm);
return -ENOMEM;
}
INIT_WORK(&cm->rx_work, rio_ibmsg_handler);
cm->tx_slot = 0;