Input: synaptics-rmi4 - fix UAF of IRQ domain on driver removal
Calling irq_domain_remove() will lead to freeing the IRQ domain prematurely. The domain is still referenced and will be attempted to get used via rmi_free_function_list() -> rmi_unregister_function() -> irq_dispose_mapping() -> irq_get_irq_data()'s ->domain pointer. With PaX's MEMORY_SANITIZE this will lead to an access fault when attempting to dereference embedded pointers, as in Torsten's report that was faulting on the 'domain->ops->unmap' test. Fix this by releasing the IRQ domain only after all related IRQs have been deactivated. Fixes: 24d28e4f ("Input: synaptics-rmi4 - convert irq distribution to irq_domain") Reported-by:Torsten Hilbrich <torsten.hilbrich@secunet.com> Signed-off-by:
Mathias Krause <minipli@grsecurity.net> Link: https://lore.kernel.org/r/20240222142654.856566-1-minipli@grsecurity.net Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com>
parent
963465a3
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