From: Armin Wolf W_Armin@gmx.de

stable inclusion from stable-v6.6.51 commit 217539e994e53206bbf3fb330261cc78c480d311 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IARWCY CVE: CVE-2024-46768

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

--------------------------------

[ Upstream commit a54da9df75cd1b4b5028f6c60f9a211532680585 ]

The BIOS can choose to return no event data in response to a WMI event, so the ACPI object passed to the WMI notify handler can be NULL.

Check for such a situation and ignore the event in such a case.

Fixes: 23902f98f8d4 ("hwmon: add HP WMI Sensors driver") Signed-off-by: Armin Wolf W_Armin@gmx.de Reviewed-by: Ilpo Järvinen ilpo.jarvinen@linux.intel.com Message-ID: 20240901031055.3030-2-W_Armin@gmx.de Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zhao Wenhui zhaowenhui8@huawei.com --- drivers/hwmon/hp-wmi-sensors.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/hwmon/hp-wmi-sensors.c b/drivers/hwmon/hp-wmi-sensors.c index b5325d0e72b9..dfa1d6926dea 100644 --- a/drivers/hwmon/hp-wmi-sensors.c +++ b/drivers/hwmon/hp-wmi-sensors.c @@ -1637,6 +1637,8 @@ static void hp_wmi_notify(u32 value, void *context) goto out_unlock;

wobj = out.pointer; + if (!wobj) + goto out_unlock;

err = populate_event_from_wobj(dev, &event, wobj); if (err) {