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usb: gadget: udc: Potential Oops in error handling code

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[ Upstream commit e55f3c37cb8d31c7e301f46396b2ac6a19eb3a7c ]

If this is in "transceiver" mode the the ->qwork isn't required and is
a NULL pointer.  This can lead to a NULL dereference when we call
destroy_workqueue(udc->qwork).

Fixes: 3517c31a8e ("usb: gadget: mv_udc: use devm_xxx for probe")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2020-06-15 14:27:19 +03:00 • committed by Sasha Levin
commit 5034b1fdb0
1 changed files with 2 additions and 1 deletions
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3
drivers/usb/gadget/udc/mv_udc_core.c
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@ -2313,7 +2313,8 @@ static int mv_udc_probe(struct platform_device *pdev)
return 0;
err_create_workqueue:
destroy_workqueue(udc->qwork);
if (udc->qwork)
destroy_workqueue(udc->qwork);
err_destroy_dma:
dma_pool_destroy(udc->dtd_pool);
err_free_dma: