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

[ 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: 24d28e4f12 ("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>
This commit is contained in:
Dan Carpenter 2023-10-29 02:53:36 +00:00 committed by Greg Kroah-Hartman
parent 1498352ee9
commit c8e639f574
1 changed files with 1 additions and 1 deletions
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2
drivers/input/rmi4/rmi_bus.c
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@ -277,11 +277,11 @@ void rmi_unregister_function(struct rmi_function *fn)
device_del(&fn->dev);
of_node_put(fn->dev.of_node);
put_device(&fn->dev);
for (i = 0; i < fn->num_of_irqs; i++)
irq_dispose_mapping(fn->irq[i]);
put_device(&fn->dev);
}
/**