diff options
author | Guenter Roeck | 2024-02-21 06:01:20 -0800 |
---|---|---|
committer | Guenter Roeck | 2024-02-21 13:56:33 -0800 |
commit | d56e460e19ea8382f813eb489730248ec8d7eb73 (patch) | |
tree | 92f27ee9b80ccb0887039b58973e6828e25e2271 /drivers/hwmon | |
parent | 841c35169323cd833294798e58b9bf63fa4fa1de (diff) |
hwmon: (nct6775) Fix access to temperature configuration registers
The number of temperature configuration registers does
not always match the total number of temperature registers.
This can result in access errors reported if KASAN is enabled.
BUG: KASAN: global-out-of-bounds in nct6775_probe+0x5654/0x6fe9 nct6775_core
Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Closes: https://lore.kernel.org/linux-hwmon/d51181d1-d26b-42b2-b002-3f5a4037721f@roeck-us.net/
Fixes: b7f1f7b2523a ("hwmon: (nct6775) Additional TEMP registers for nct6799")
Cc: Ahmad Khalifa <ahmad@khalifa.ws>
Tested-by: Ahmad Khalifa <ahmad@khalifa.ws>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
-rw-r--r-- | drivers/hwmon/nct6775-core.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/hwmon/nct6775-core.c b/drivers/hwmon/nct6775-core.c index 8d2ef3145bca..9fbab8f02334 100644 --- a/drivers/hwmon/nct6775-core.c +++ b/drivers/hwmon/nct6775-core.c @@ -3512,6 +3512,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, const u16 *reg_temp_mon, *reg_temp_alternate, *reg_temp_crit; const u16 *reg_temp_crit_l = NULL, *reg_temp_crit_h = NULL; int num_reg_temp, num_reg_temp_mon, num_reg_tsi_temp; + int num_reg_temp_config; struct device *hwmon_dev; struct sensor_template_group tsi_temp_tg; @@ -3594,6 +3595,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6106_REG_TEMP_OVER; reg_temp_hyst = NCT6106_REG_TEMP_HYST; reg_temp_config = NCT6106_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6106_REG_TEMP_CONFIG); reg_temp_alternate = NCT6106_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6106_REG_TEMP_CRIT; reg_temp_crit_l = NCT6106_REG_TEMP_CRIT_L; @@ -3669,6 +3671,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6106_REG_TEMP_OVER; reg_temp_hyst = NCT6106_REG_TEMP_HYST; reg_temp_config = NCT6106_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6106_REG_TEMP_CONFIG); reg_temp_alternate = NCT6106_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6106_REG_TEMP_CRIT; reg_temp_crit_l = NCT6106_REG_TEMP_CRIT_L; @@ -3746,6 +3749,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6775_REG_TEMP_OVER; reg_temp_hyst = NCT6775_REG_TEMP_HYST; reg_temp_config = NCT6775_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6775_REG_TEMP_CONFIG); reg_temp_alternate = NCT6775_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6775_REG_TEMP_CRIT; @@ -3821,6 +3825,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6775_REG_TEMP_OVER; reg_temp_hyst = NCT6775_REG_TEMP_HYST; reg_temp_config = NCT6776_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6776_REG_TEMP_CONFIG); reg_temp_alternate = NCT6776_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6776_REG_TEMP_CRIT; @@ -3900,6 +3905,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6779_REG_TEMP_OVER; reg_temp_hyst = NCT6779_REG_TEMP_HYST; reg_temp_config = NCT6779_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6779_REG_TEMP_CONFIG); reg_temp_alternate = NCT6779_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6779_REG_TEMP_CRIT; @@ -4034,6 +4040,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6779_REG_TEMP_OVER; reg_temp_hyst = NCT6779_REG_TEMP_HYST; reg_temp_config = NCT6779_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6779_REG_TEMP_CONFIG); reg_temp_alternate = NCT6779_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6779_REG_TEMP_CRIT; @@ -4123,6 +4130,7 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, reg_temp_over = NCT6798_REG_TEMP_OVER; reg_temp_hyst = NCT6798_REG_TEMP_HYST; reg_temp_config = NCT6779_REG_TEMP_CONFIG; + num_reg_temp_config = ARRAY_SIZE(NCT6779_REG_TEMP_CONFIG); reg_temp_alternate = NCT6798_REG_TEMP_ALTERNATE; reg_temp_crit = NCT6798_REG_TEMP_CRIT; @@ -4204,7 +4212,8 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, = reg_temp_crit[src - 1]; if (reg_temp_crit_l && reg_temp_crit_l[i]) data->reg_temp[4][src - 1] = reg_temp_crit_l[i]; - data->reg_temp_config[src - 1] = reg_temp_config[i]; + if (i < num_reg_temp_config) + data->reg_temp_config[src - 1] = reg_temp_config[i]; data->temp_src[src - 1] = src; continue; } @@ -4217,7 +4226,8 @@ int nct6775_probe(struct device *dev, struct nct6775_data *data, data->reg_temp[0][s] = reg_temp[i]; data->reg_temp[1][s] = reg_temp_over[i]; data->reg_temp[2][s] = reg_temp_hyst[i]; - data->reg_temp_config[s] = reg_temp_config[i]; + if (i < num_reg_temp_config) + data->reg_temp_config[s] = reg_temp_config[i]; if (reg_temp_crit_h && reg_temp_crit_h[i]) data->reg_temp[3][s] = reg_temp_crit_h[i]; else if (reg_temp_crit[src - 1]) |