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power: supply: fix null pointer dereferencing in power_supply_get_battery_info

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when kmalloc() fail to allocate memory in kasprintf(), propname
will be NULL, strcmp() called by of_get_property() will cause
null pointer dereference.

So return ENOMEM if kasprintf() return NULL pointer.

Fixes: 3afb50d7125b ("power: supply: core: Add some helpers to use the battery OCV capacity table")
Signed-off-by: ruanjinjie <ruanjinjie@huawei.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
ruanjinjie 2022-12-05 15:51:53 +08:00 committed by Sebastian Reichel
parent 7e6fb67808
commit 104bb8a663
1 changed files with 5 additions and 0 deletions
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5
drivers/power/supply/power_supply_core.c
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@ -750,6 +750,11 @@ int power_supply_get_battery_info(struct power_supply *psy,
int i, tab_len, size;
propname = kasprintf(GFP_KERNEL, "ocv-capacity-table-%d", index);
if (!propname) {
power_supply_put_battery_info(psy, info);
err = -ENOMEM;
goto out_put_node;
}
list = of_get_property(battery_np, propname, &size);
if (!list || !size) {
dev_err(&psy->dev, "failed to get %s\n", propname);