From 5d521a307526871f5613d24a8e71babf1869c486 Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Tue, 8 Mar 2022 11:09:01 -0800 Subject: PM / devfreq: rk3399_dmc: Avoid static (reused) profile This static struct can get reused if the device gets removed/reprobed, and that causes use-after-free in its ->freq_table. Let's just move the struct to our dynamic allocation. Signed-off-by: Brian Norris Signed-off-by: Chanwoo Choi --- drivers/devfreq/rk3399_dmc.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) (limited to 'drivers/devfreq') diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c index 9615658d04ae..e494d1497d60 100644 --- a/drivers/devfreq/rk3399_dmc.c +++ b/drivers/devfreq/rk3399_dmc.c @@ -38,6 +38,7 @@ struct rk3399_dmcfreq { struct device *dev; struct devfreq *devfreq; + struct devfreq_dev_profile profile; struct devfreq_simple_ondemand_data ondemand_data; struct clk *dmc_clk; struct devfreq_event_dev *edev; @@ -228,13 +229,6 @@ static int rk3399_dmcfreq_get_cur_freq(struct device *dev, unsigned long *freq) return 0; } -static struct devfreq_dev_profile rk3399_devfreq_dmc_profile = { - .polling_ms = 200, - .target = rk3399_dmcfreq_target, - .get_dev_status = rk3399_dmcfreq_get_dev_status, - .get_cur_freq = rk3399_dmcfreq_get_cur_freq, -}; - static __maybe_unused int rk3399_dmcfreq_suspend(struct device *dev) { struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(dev); @@ -422,10 +416,16 @@ no_pmu: data->volt = dev_pm_opp_get_voltage(opp); dev_pm_opp_put(opp); - rk3399_devfreq_dmc_profile.initial_freq = data->rate; + data->profile = (struct devfreq_dev_profile) { + .polling_ms = 200, + .target = rk3399_dmcfreq_target, + .get_dev_status = rk3399_dmcfreq_get_dev_status, + .get_cur_freq = rk3399_dmcfreq_get_cur_freq, + .initial_freq = data->rate, + }; data->devfreq = devm_devfreq_add_device(dev, - &rk3399_devfreq_dmc_profile, + &data->profile, DEVFREQ_GOV_SIMPLE_ONDEMAND, &data->ondemand_data); if (IS_ERR(data->devfreq)) { -- cgit v1.2.3