From: Eddie James <eajames@linux.ibm.com>
To: linux-hwmon@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, jdelvare@suse.com,
linux@roeck-us.net, dan.carpenter@oracle.com,
Eddie James <eajames@linux.ibm.com>
Subject: [PATCH] hwmon: (pmbus/ibm-cffps) Prevent writing on_off_config with bad data
Date: Tue, 7 Jan 2020 09:40:40 -0600 [thread overview]
Message-ID: <1578411640-16929-1-git-send-email-eajames@linux.ibm.com> (raw)
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
next reply other threads:[~2020-01-07 15:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 15:40 Eddie James [this message]
2020-01-11 3:45 ` [PATCH] hwmon: (pmbus/ibm-cffps) Prevent writing on_off_config with bad data Guenter Roeck
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1578411640-16929-1-git-send-email-eajames@linux.ibm.com \
--to=eajames@linux.ibm.com \
--cc=dan.carpenter@oracle.com \
--cc=jdelvare@suse.com \
--cc=linux-hwmon@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox