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| author | Mathias Krause <minipli@grsecurity.net> | 2024-02-22 15:26:54 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2024-03-08 00:29:52 +0100 |
| commit | fbf8d71742557abaf558d8efb96742d442720cc2 (patch) | |
| tree | 0e3abc2bdc680208091565c0546724b18edf2dfc /drivers/input/misc | |
| parent | Input: gpio_keys_polled - suppress deferred probe error for gpio (diff) | |
| download | linux-fbf8d71742557abaf558d8efb96742d442720cc2.tar.xz linux-fbf8d71742557abaf558d8efb96742d442720cc2.zip | |
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: 24d28e4f1271 ("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>
Diffstat (limited to 'drivers/input/misc')
0 files changed, 0 insertions, 0 deletions