From: Sven Peter <sven@svenpeter.dev>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
Sven Peter <sven@svenpeter.dev>
Subject: [PATCH 2/2] usb: typec: tipd: Add an additional overflow check
Date: Tue, 14 Sep 2021 12:42:53 +0200 [thread overview]
Message-ID: <20210914104253.61365-2-sven@svenpeter.dev> (raw)
In-Reply-To: <20210914104253.61365-1-sven@svenpeter.dev>
tps6598x_block_read already checks for the maximum length of the read
but tps6598x_block_write does not. Add the symmetric check there as
well.
Signed-off-by: Sven Peter <sven@svenpeter.dev>
---
drivers/usb/typec/tipd/core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index c18ec3785592..70e2d0d410c9 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -139,6 +139,9 @@ static int tps6598x_block_write(struct tps6598x *tps, u8 reg,
{
u8 data[TPS_MAX_LEN + 1];
+ if (WARN_ON(len + 1 > sizeof(data)))
+ return -EINVAL;
+
if (!tps->i2c_protocol)
return regmap_raw_write(tps->regmap, reg, val, len);
--
2.25.1
next prev parent reply other threads:[~2021-09-14 10:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-14 10:42 [PATCH 1/2] usb: typec: tipd: Don't read/write more bytes than required Sven Peter
2021-09-14 10:42 ` Sven Peter [this message]
2021-09-14 11:00 ` [PATCH 2/2] usb: typec: tipd: Add an additional overflow check Greg Kroah-Hartman
2021-09-14 11:18 ` Sven Peter
2021-09-14 11:23 ` Greg Kroah-Hartman
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=20210914104253.61365-2-sven@svenpeter.dev \
--to=sven@svenpeter.dev \
--cc=gregkh@linuxfoundation.org \
--cc=heikki.krogerus@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.