linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Takashi Iwai <tiwai@suse.de>
To: Sudeep Dutt <sudeep.dutt@intel.com>,
	Ashutosh Dixit <ashutosh.dixit@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] misc: mic: Use scnprintf() for avoiding potential buffer overflow
Date: Wed, 11 Mar 2020 08:49:16 +0100	[thread overview]
Message-ID: <20200311074916.8783-1-tiwai@suse.de> (raw)

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 drivers/misc/mic/host/mic_x100.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/mic/host/mic_x100.c b/drivers/misc/mic/host/mic_x100.c
index a7743312da9c..d18cda966912 100644
--- a/drivers/misc/mic/host/mic_x100.c
+++ b/drivers/misc/mic/host/mic_x100.c
@@ -350,10 +350,10 @@ mic_x100_load_command_line(struct mic_device *mdev, const struct firmware *fw)
 	if (!buf)
 		return -ENOMEM;
 
-	len += snprintf(buf, CMDLINE_SIZE - len,
+	len += scnprintf(buf, CMDLINE_SIZE - len,
 		" mem=%dM", boot_mem);
 	if (mdev->cosm_dev->cmdline)
-		snprintf(buf + len, CMDLINE_SIZE - len, " %s",
+		scnprintf(buf + len, CMDLINE_SIZE - len, " %s",
 			 mdev->cosm_dev->cmdline);
 	memcpy_toio(cmd_line_va, buf, strlen(buf) + 1);
 	kfree(buf);
-- 
2.16.4


                 reply	other threads:[~2020-03-11  7:49 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

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=20200311074916.8783-1-tiwai@suse.de \
    --to=tiwai@suse.de \
    --cc=arnd@arndb.de \
    --cc=ashutosh.dixit@intel.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=sudeep.dutt@intel.com \
    /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;
as well as URLs for NNTP newsgroup(s).