[PATCH 6.19 227/342] hwmon: (peci/cputemp) Fix off-by-one in cputemp_is_visible()

Greg Kroah-Hartman
2026-03-31T16:41:07Z

From: Sanman Pradhan <psanman@juniper.net>

commit b0c9d8ae71509f25690d57f2efddebf7f4b12194 upstream.

cputemp_is_visible() validates the channel index against
CPUTEMP_CHANNEL_NUMS, but currently uses '>' instead of '>='.
As a result, channel == CPUTEMP_CHANNEL_NUMS is not rejected even though
valid indices are 0 .. CPUTEMP_CHANNEL_NUMS - 1.

Fix the bounds check by using '>=' so invalid channel indices are
rejected before indexing the core bitmap.

Fixes: bf3608f338e9 ("hwmon: peci: Add cputemp driver")
Cc: stable@vger.kernel.org
Signed-off-by: Sanman Pradhan <psanman@juniper.net>
Link: https://lore.kernel.org/r/20260323002352.93417-3-sanman.pradhan@hpe.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/hwmon/peci/cputemp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/hwmon/peci/cputemp.c
+++ b/drivers/hwmon/peci/cputemp.c
@@ -319,7 +319,7 @@ static umode_t cputemp_is_visible(const
{
const struct peci_cputemp *priv = data;

- if (channel > CPUTEMP_CHANNEL_NUMS)
+ if (channel >= CPUTEMP_CHANNEL_NUMS)
return 0;

if (channel < channel_core)