usb: cdns3: change place of 'priv_ep' assignment in cdns3_gadget_ep_dequeue(),...

usb: cdns3: change place of 'priv_ep' assignment in cdns3_gadget_ep_dequeue(), cdns3_gadget_ep_enable()

stable inclusion
from stable-v5.10.137
commit 7af83bb516d7aa4f96835288e4aeda21d7aa2a17
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=7af83bb516d7aa4f96835288e4aeda21d7aa2a17



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[ Upstream commit c3ffc9c4 ]

If 'ep' is NULL, result of ep_to_cdns3_ep(ep) is invalid pointer
and its dereference with priv_ep->cdns3_dev may cause panic.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 7733f6c3 ("usb: cdns3: Add Cadence USB3 DRD Driver")
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Andrey Strachuk <strochuk@ispras.ru>
Link: https://lore.kernel.org/r/20220718160052.4188-1-strochuk@ispras.ru


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Wei Li <liwei391@huawei.com>