From: Gaosheng Cui cuigaosheng1@huawei.com

stable inclusion from stable-v5.10.158 commit 90907cd4d11351ff76c9a447bcb5db0e264c47cd category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAYRE1 CVE: CVE-2022-49029

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

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

[ Upstream commit e2a87785aab0dac190ac89be6a9ba955e2c634f2 ]

Smatch report warning as follows:

drivers/hwmon/ibmpex.c:509 ibmpex_register_bmc() warn: '&data->list' not removed from list

If ibmpex_find_sensors() fails in ibmpex_register_bmc(), data will be freed, but data->list will not be removed from driver_data.bmc_data, then list traversal may cause UAF.

Fix by removeing it from driver_data.bmc_data before free().

Fixes: 57c7c3a0fdea ("hwmon: IBM power meter driver") Signed-off-by: Gaosheng Cui cuigaosheng1@huawei.com Link: https://lore.kernel.org/r/20221117034423.2935739-1-cuigaosheng1@huawei.com Signed-off-by: Guenter Roeck linux@roeck-us.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Cui GaoSheng cuigaosheng1@huawei.com --- drivers/hwmon/ibmpex.c | 1 + 1 file changed, 1 insertion(+)

diff --git a/drivers/hwmon/ibmpex.c b/drivers/hwmon/ibmpex.c index b2ab83c9fd9a..fe90f0536d76 100644 --- a/drivers/hwmon/ibmpex.c +++ b/drivers/hwmon/ibmpex.c @@ -502,6 +502,7 @@ static void ibmpex_register_bmc(int iface, struct device *dev) return;

out_register: + list_del(&data->list); hwmon_device_unregister(data->hwmon_dev); out_user: ipmi_destroy_user(data->user);