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| author | Manuel Fombuena <fombuena@outlook.com> | 2026-07-02 23:35:58 +0100 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2026-07-09 10:52:23 +0100 |
| commit | cf197514bdfd3877f42b5dce1efd40b7b686547e (patch) | |
| tree | f9ecb521dad50c3ac6b1b288204178e91c570e76 | |
| parent | 0767335233a8cbab00bbe260a4e4bd380c7677fd (diff) | |
| download | linux-cf197514bdfd3877f42b5dce1efd40b7b686547e.tar.gz linux-cf197514bdfd3877f42b5dce1efd40b7b686547e.zip | |
leds: st1202: Validate LED reg property against channel count
The reg property from the device tree is used directly as an array index
into chip->leds[] without bounds checking. A value >= ST1202_MAX_LEDS
would cause an out-of-bounds write during probe.
Fixes: 259230378c65 ("leds: Add LED1202 I2C driver")
Signed-off-by: Manuel Fombuena <fombuena@outlook.com>
Assisted-by: Claude:claude-sonnet-4-6
Link: https://patch.msgid.link/GV1PR08MB849718B43321DB7E5A05D17BC5F52@GV1PR08MB8497.eurprd08.prod.outlook.com
Signed-off-by: Lee Jones <lee@kernel.org>
| -rw-r--r-- | drivers/leds/leds-st1202.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/leds/leds-st1202.c b/drivers/leds/leds-st1202.c index 2ecd36aae336..168df5ecf27b 100644 --- a/drivers/leds/leds-st1202.c +++ b/drivers/leds/leds-st1202.c @@ -279,13 +279,19 @@ static int st1202_dt_init(struct st1202_chip *chip) { struct device *dev = &chip->client->dev; struct st1202_led *led; - int err, reg; + int err; + u32 reg; for_each_available_child_of_node_scoped(dev_of_node(dev), child) { err = of_property_read_u32(child, "reg", ®); if (err) return dev_err_probe(dev, err, "Invalid register\n"); + if (reg >= ST1202_MAX_LEDS) + return dev_err_probe(dev, -EINVAL, + "LED reg %u out of range [0, %d]\n", + reg, ST1202_MAX_LEDS - 1); + led = &chip->leds[reg]; led->is_active = true; led->fwnode = of_fwnode_handle(child); |