All of lore.kernel.org
 help / color / mirror / Atom feed
From: Vasiliy Kulikov <segooon@gmail.com>
To: kernel-janitors@vger.kernel.org
Cc: Clemens Ladisch <clemens@ladisch.de>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Tejun Heo <tj@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/8] char: hpet: fix information leak to userland
Date: Sun, 17 Oct 2010 14:41:16 +0000	[thread overview]
Message-ID: <1287326477-7940-1-git-send-email-segooon@gmail.com> (raw)

Structure info is copied to userland with some padding fields unitialized.
It leads to leaking of stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
---
 Compile tested.

 drivers/char/hpet.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index a4eee32..f6722ef 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -581,6 +581,7 @@ hpet_ioctl_common(struct hpet_dev *devp, int cmd, unsigned long arg,
 		break;
 	case HPET_INFO:
 		{
+			memset(info, 0, sizeof(*info));
 			if (devp->hd_ireqfreq)
 				info->hi_ireqfreq  					hpet_time_div(hpetp, devp->hd_ireqfreq);
-- 
1.7.0.4


WARNING: multiple messages have this Message-ID (diff)
From: Vasiliy Kulikov <segooon@gmail.com>
To: kernel-janitors@vger.kernel.org
Cc: Clemens Ladisch <clemens@ladisch.de>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Tejun Heo <tj@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/8] char: hpet: fix information leak to userland
Date: Sun, 17 Oct 2010 18:41:16 +0400	[thread overview]
Message-ID: <1287326477-7940-1-git-send-email-segooon@gmail.com> (raw)

Structure info is copied to userland with some padding fields unitialized.
It leads to leaking of stack memory.

Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
---
 Compile tested.

 drivers/char/hpet.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index a4eee32..f6722ef 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -581,6 +581,7 @@ hpet_ioctl_common(struct hpet_dev *devp, int cmd, unsigned long arg,
 		break;
 	case HPET_INFO:
 		{
+			memset(info, 0, sizeof(*info));
 			if (devp->hd_ireqfreq)
 				info->hi_ireqfreq =
 					hpet_time_div(hpetp, devp->hd_ireqfreq);
-- 
1.7.0.4


             reply	other threads:[~2010-10-17 14:41 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-17 14:41 Vasiliy Kulikov [this message]
2010-10-17 14:41 ` [PATCH 2/8] char: hpet: fix information leak to userland Vasiliy Kulikov
2010-10-18 15:10 ` Clemens Ladisch
2010-10-18 15:10   ` Clemens Ladisch

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=1287326477-7940-1-git-send-email-segooon@gmail.com \
    --to=segooon@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=arnd@arndb.de \
    --cc=clemens@ladisch.de \
    --cc=ebiederm@xmission.com \
    --cc=fweisbec@gmail.com \
    --cc=kernel-janitors@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=tj@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.