Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()

stable inclusion
from stable-v4.19.299
commit 2f236d8638f5b43e0c72919a6a27fe286c32053f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9RDP6
CVE: CVE-2023-52840

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=2f236d8638f5b43e0c72919a6a27fe286c32053f



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[ Upstream commit eb988e46da2e4eae89f5337e047ce372fe33d5b1 ]

The put_device() calls rmi_release_function() which frees "fn" so the
dereference on the next line "fn->num_of_irqs" is a use after free.
Move the put_device() to the end to fix this.

Fixes: 24d28e4f ("Input: synaptics-rmi4 - convert irq distribution to irq_domain")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/706efd36-7561-42f3-adfa-dd1d0bd4f5a1@moroto.mountain


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Liu Chuang <liuchuang40@huawei.com>