diff options
| author | Mathias Krause <minipli@grsecurity.net> | 2024-02-22 15:26:54 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2024-03-07 15:29:52 -0800 |
| commit | fbf8d71742557abaf558d8efb96742d442720cc2 (patch) | |
| tree | 0e3abc2bdc680208091565c0546724b18edf2dfc | |
| parent | 963465a33141d0d52338e77f80fe543d2c9dc053 (diff) | |
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>
| -rw-r--r-- | drivers/input/rmi4/rmi_driver.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c index 258d5fe3d395..42eaebb3bf5c 100644 --- a/drivers/input/rmi4/rmi_driver.c +++ b/drivers/input/rmi4/rmi_driver.c @@ -978,12 +978,12 @@ static int rmi_driver_remove(struct device *dev) rmi_disable_irq(rmi_dev, false); - irq_domain_remove(data->irqdomain); - data->irqdomain = NULL; - rmi_f34_remove_sysfs(rmi_dev); rmi_free_function_list(rmi_dev); + irq_domain_remove(data->irqdomain); + data->irqdomain = NULL; + return 0; } |