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power: supply: core: fix supplied_from allocations

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If dts property power-supplies has multiple values, then accessing to
psy->supplied_from[i-1] in __power_supply_populate_supplied_from will
overrun supplied_from array.

Fixes: f6e0b081fb ("power_supply: Populate supplied_from hierarchy from the device tree")
Signed-off-by: Lucas Tsai <lucas_tsai@richtek.com>
Link: https://patch.msgid.link/20260609114403.3896073-1-lucas_tsai@richtek.com
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Lucas Tsai 2026-06-09 19:44:03 +08:00 committed by Sebastian Reichel
parent 4acc0138c4
commit ba61aed9a3
1 changed files with 3 additions and 8 deletions
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11
drivers/power/supply/power_supply_core.c
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@ -292,18 +292,13 @@ static int power_supply_check_supplies(struct power_supply *psy)
if (cnt == 1)
return 0;
/* All supplies found, allocate char ** array for filling */
psy->supplied_from = devm_kzalloc(&psy->dev, sizeof(*psy->supplied_from),
/* All supplies found, allocate char * array for filling */
psy->supplied_from = devm_kcalloc(&psy->dev,
cnt - 1, sizeof(*psy->supplied_from),
GFP_KERNEL);
if (!psy->supplied_from)
return -ENOMEM;
*psy->supplied_from = devm_kcalloc(&psy->dev,
cnt - 1, sizeof(**psy->supplied_from),
GFP_KERNEL);
if (!*psy->supplied_from)
return -ENOMEM;
return power_supply_populate_supplied_from(psy);
}
#else