On Thu, 2023-10-05 at 07:17 -0400, David Arcari wrote:

KASAN reported this

[ 444.853098] BUG: KASAN: global-out-of-bounds in param_get_int+0x77/0x90       [ 444.853111] Read of size 4 at addr ffffffffc16c9220 by task cat/2105       ...       [ 444.853442] The buggy address belongs to the variable:       [ 444.853443] max_idle+0x0/0xffffffffffffcde0 [intel_powerclamp]

There is a mismatch between the param_get_int and the definition of max_idle.  Replacing param_get_int with param_get_byte resolves this issue.

Fixes: ebf519710218 ("thermal: intel: powerclamp: Add two module parameters")

Cc: "Rafael J. Wysocki" rafael@kernel.org Cc: Daniel Lezcano daniel.lezcano@linaro.org Cc: Amit Kucheria amitk@kernel.org Cc: Zhang Rui rui.zhang@intel.com Cc: Srinivas Pandruvada srinivas.pandruvada@linux.intel.com Cc: David Arcari darcari@redhat.com Cc: Chen Yu yu.c.chen@intel.com Cc: linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: David Arcari darcari@redhat.com

Reviewed-by: Srinivas Pandruvada srinivas.pandruvada@linux.intel.com

---

drivers/thermal/intel/intel_powerclamp.c | 2 +-  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/intel/intel_powerclamp.c b/drivers/thermal/intel/intel_powerclamp.c index 36243a3972fd..5ac5cb60bae6 100644 --- a/drivers/thermal/intel/intel_powerclamp.c +++ b/drivers/thermal/intel/intel_powerclamp.c @@ -256,7 +256,7 @@ static int max_idle_set(const char *arg, const struct kernel_param *kp)    static const struct kernel_param_ops max_idle_ops = {         .set = max_idle_set, -       .get = param_get_int, +       .get = param_get_byte,  };    module_param_cb(max_idle, &max_idle_ops, &max_idle, 0644);