Messages in this thread Patch in this message | | | From | Benjamin Tissoires <> | Subject | [PATCH] Input: rmi4 - prevent null pointer dereference in f30 | Date | Fri, 10 Mar 2017 19:05:52 +0100 |
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If the platform data has f30_data.disable set, f30 in rmi_f30_config() might be null. Prevent a kernel oops by checking for non-null f30.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> --- drivers/input/rmi4/rmi_f30.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/input/rmi4/rmi_f30.c b/drivers/input/rmi4/rmi_f30.c index d8ff285..a0e4030 100644 --- a/drivers/input/rmi4/rmi_f30.c +++ b/drivers/input/rmi4/rmi_f30.c @@ -170,6 +170,10 @@ static int rmi_f30_config(struct rmi_function *fn) rmi_get_platform_data(fn->rmi_dev); int error; + /* can happen if f30_data.disable is set */ + if (!f30) + return 0; + if (pdata->f30_data.trackstick_buttons) { /* Try [re-]establish link to F03. */ f30->f03 = rmi_find_function(fn->rmi_dev, 0x03); -- 2.9.3
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