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power: supply: gpio-charger: Fix set charge current limits

Browse Source 
BugLink: https://bugs.launchpad.net/bugs/2103869

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: be2919d835 ("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-v1-1-760d9b8f2af3@liebherr.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CVE-2024-57792
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Dimitri Fedrau
2024-12-09 11:46:15 +01:00
committed by Mehmet Basaran
parent 88551fc08e
commit 5889349a45
1 changed files with 8 additions and 0 deletions
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drivers/power/supply/gpio-charger.c
+8
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@@ -67,6 +67,14 @@ static int set_charge_current_limit(struct gpio_charger *gpio_charger, int val)
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++) {