queue-7.0/leds-qcom-lpg-check-for-array-overflow-when-selecting-the-high-resolution.patch

From d45963a93c1495e9f1338fde91d0ebba8fd22474 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 19 Feb 2026 15:34:35 +0100
Subject: leds: qcom-lpg: Check for array overflow when selecting the high resolution

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit d45963a93c1495e9f1338fde91d0ebba8fd22474 upstream.

When selecting the high resolution values from the array, FIELD_GET() is
used to pull from a 3 bit register, yet the array being indexed has only
5 values in it.  Odds are the hardware is sane, but just to be safe,
properly check before just overflowing and reading random data and then
setting up chip values based on that.

Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patch.msgid.link/2026021934-nearby-playroom-036b@gregkh
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/leds/rgb/leds-qcom-lpg.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/leds/rgb/leds-qcom-lpg.c
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -1273,7 +1273,12 @@ static int lpg_pwm_get_state(struct pwm_
 		return ret;
 
 	if (chan->subtype == LPG_SUBTYPE_HI_RES_PWM) {
-		refclk = lpg_clk_rates_hi_res[FIELD_GET(PWM_CLK_SELECT_HI_RES_MASK, val)];
+		unsigned int clk_idx = FIELD_GET(PWM_CLK_SELECT_HI_RES_MASK, val);
+
+		if (clk_idx >= ARRAY_SIZE(lpg_clk_rates_hi_res))
+			return -EINVAL;
+
+		refclk = lpg_clk_rates_hi_res[clk_idx];
 		resolution = lpg_pwm_resolution_hi_res[FIELD_GET(PWM_SIZE_HI_RES_MASK, val)];
 	} else {
 		refclk = lpg_clk_rates[FIELD_GET(PWM_CLK_SELECT_MASK, val)];