Messages in this thread Patch in this message | | | From | Eddie James <> | Subject | [PATCH] hwmon: (pmbus/ibm-cffps) Prevent writing on_off_config with bad data | Date | Tue, 7 Jan 2020 09:40:40 -0600 |
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If the user write parameters resulted in no bytes being written to the temporary buffer, then ON_OFF_CONFIG will be written with uninitialized data. Prevent this by bailing out in this case.
Signed-off-by: Eddie James <eajames@linux.ibm.com> --- drivers/hwmon/pmbus/ibm-cffps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c index 1c91ee1f9926..3795fe55b84f 100644 --- a/drivers/hwmon/pmbus/ibm-cffps.c +++ b/drivers/hwmon/pmbus/ibm-cffps.c @@ -250,7 +250,7 @@ static ssize_t ibm_cffps_debugfs_write(struct file *file, pmbus_set_page(psu->client, 0); rc = simple_write_to_buffer(&data, 1, ppos, buf, count); - if (rc < 0) + if (rc <= 0) return rc; rc = i2c_smbus_write_byte_data(psu->client, -- 2.24.0
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