linux-kernel - [PATCH 2/2] ppdev: add support for compat ioctl

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1449641498-5761-3-git-send-email-bamvor.zhangjian@linaro.org>
Date:	Wed,  9 Dec 2015 14:11:38 +0800
From:	Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>
To:	linux-kernel@...r.kernel.org
Cc:	y2038@...ts.linaro.org, gregkh@...uxfoundation.org, arnd@...db.de,
	sudipm.mukherjee@...il.com, broonie@...nel.org,
	Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>
Subject: [PATCH 2/2] ppdev: add support for compat ioctl

The arg of ioctl in ppdev is the pointer of integer except the
timeval in PPSETTIME, PPGETTIME. Different size of timeval
is already supported by the previous patches. So, it is safe
to add compat support.

Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>
---
 drivers/char/ppdev.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/char/ppdev.c b/drivers/char/ppdev.c
index 19a4d6e..7390166 100644
--- a/drivers/char/ppdev.c
+++ b/drivers/char/ppdev.c
@@ -670,6 +670,14 @@ static long pp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	return ret;
 }
 
+#ifdef CONFIG_COMPAT
+static long pp_compat_ioctl(struct file *file, unsigned int cmd,
+		unsigned long arg)
+{
+	return pp_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
 static int pp_open (struct inode * inode, struct file * file)
 {
 	unsigned int minor = iminor(inode);
@@ -779,6 +787,9 @@ static const struct file_operations pp_fops = {
 	.write		= pp_write,
 	.poll		= pp_poll,
 	.unlocked_ioctl	= pp_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl   = pp_compat_ioctl,
+#endif
 	.open		= pp_open,
 	.release	= pp_release,
 };
-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/