Messages in this thread Patch in this message | | | From | Yang Yingliang <> | Subject | [PATCH] regulator: rt5759: fix OOB in validate_desc() | Date | Wed, 16 Nov 2022 17:29:43 +0800 |
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I got the following OOB report:
BUG: KASAN: slab-out-of-bounds in validate_desc+0xba/0x109 Read of size 8 at addr ffff888107db8ff0 by task python3/253 Call Trace: <TASK> dump_stack_lvl+0x67/0x83 print_report+0x178/0x4b0 kasan_report+0x90/0x190 validate_desc+0xba/0x109 gpiod_set_value_cansleep+0x40/0x5a regulator_ena_gpio_ctrl+0x93/0xfc _regulator_do_enable.cold.61+0x89/0x163 set_machine_constraints+0x140a/0x159c regulator_register.cold.73+0x762/0x10cd devm_regulator_register+0x57/0xb0 rt5759_probe+0x3a0/0x4ac [rt5759_regulator]
The desc used in validate_desc() is passed from 'reg_cfg.ena_gpiod', which is not initialized. Fix this by initializing 'reg_cfg' to 0.
Fixes: 7b36ddb208bd ("regulator: rt5759: Add support for Richtek RT5759 DCDC converter") Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/regulator/rt5759-regulator.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/regulator/rt5759-regulator.c b/drivers/regulator/rt5759-regulator.c index 6b96899eb27e..8488417f4b2c 100644 --- a/drivers/regulator/rt5759-regulator.c +++ b/drivers/regulator/rt5759-regulator.c @@ -243,6 +243,7 @@ static int rt5759_regulator_register(struct rt5759_priv *priv) if (priv->chip_type == CHIP_TYPE_RT5759A) reg_desc->uV_step = RT5759A_STEP_UV; + memset(®_cfg, 0, sizeof(reg_cfg)); reg_cfg.dev = priv->dev; reg_cfg.of_node = np; reg_cfg.init_data = of_get_regulator_init_data(priv->dev, np, reg_desc); -- 2.25.1
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