archive mirror
 help / color / mirror / Atom feed
From: Dan Carpenter <>
To: Corey Minyard <>
Cc: Quan Nguyen <>,,,
Subject: [PATCH] ipmi: ssif_bmc: Return -EFAULT if copy_from_user() fails
Date: Fri, 23 Jul 2021 11:44:59 +0300	[thread overview]
Message-ID: <20210723084459.GA21470@kili> (raw)

The copy_from_user() function returns the number of bytes remaining to
be copied but we should return -EFAULT here.

Fixes: 007888f365c9 ("ipmi: ssif_bmc: Add SSIF BMC driver")
Signed-off-by: Dan Carpenter <>
 drivers/char/ipmi/ssif_bmc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/char/ipmi/ssif_bmc.c b/drivers/char/ipmi/ssif_bmc.c
index b15c05622e72..ce8cd8364a3f 100644
--- a/drivers/char/ipmi/ssif_bmc.c
+++ b/drivers/char/ipmi/ssif_bmc.c
@@ -85,9 +85,8 @@ static ssize_t ssif_bmc_write(struct file *file, const char __user *buf, size_t
 	if (count > sizeof(struct ssif_msg))
 		return -EINVAL;
-	ret = copy_from_user(&msg, buf, count);
-	if (ret)
-		return ret;
+	if (copy_from_user(&msg, buf, count))
+		return -EFAULT;
 	if (!msg.len || count < ssif_msg_len(&msg))
 		return -EINVAL;

             reply	other threads:[~2021-07-23  8:45 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-23  8:44 Dan Carpenter [this message]
2021-07-23 12:24 ` [PATCH] ipmi: ssif_bmc: Return -EFAULT if copy_from_user() fails Corey Minyard

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:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210723084459.GA21470@kili \ \ \ \ \ \ \

* 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;
as well as URLs for NNTP newsgroup(s).