5.15-stable review patch. If anyone has any objections, please let me know.
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From: Dimitri Fedrau dimitri.fedrau@liebherr.com
commit afc6e39e824ad0e44b2af50a97885caec8d213d1 upstream.
Fix set charge current limits for devices which allow to set the lowest charge current limit to be greater zero. If requested charge current limit is below lowest limit, the index equals current_limit_map_size which leads to accessing memory beyond allocated memory.
Fixes: be2919d8355e ("power: supply: gpio-charger: add charge-current-limit feature") Cc: stable@vger.kernel.org Signed-off-by: Dimitri Fedrau dimitri.fedrau@liebherr.com Link: https://lore.kernel.org/r/20241209-fix-charge-current-limit-v1-1-760d9b8f2af... Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/power/supply/gpio-charger.c | 8 ++++++++ 1 file changed, 8 insertions(+)
--- a/drivers/power/supply/gpio-charger.c +++ b/drivers/power/supply/gpio-charger.c @@ -67,6 +67,14 @@ static int set_charge_current_limit(stru if (gpio_charger->current_limit_map[i].limit_ua <= val) break; } + + /* + * If a valid charge current limit isn't found, default to smallest + * current limitation for safety reasons. + */ + if (i >= gpio_charger->current_limit_map_size) + i = gpio_charger->current_limit_map_size - 1; + mapping = gpio_charger->current_limit_map[i];
for (i = 0; i < ndescs; i++) {