3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mark Salyzyn <saly...@android.com>
commit 7992c18810e568b95c869b227137a2215702a805 upstream.
CVE-2018-9363
The buffer length is unsigned at all layers, but gets cast to int and
checked in hidp_process_report and can lead to a buffer overflow.
Switch len parameter to unsigned int to resolve issue.
This affects 3.18 and newer kernels.
Signed-off-by: Mark Salyzyn <saly...@android.com>
Fixes: a4b1b5877b514b276f0f31efe02388a9c2836728 ("HID: Bluetooth: hidp: make
sure input buffers are big enough")
Cc: Marcel Holtmann <mar...@holtmann.org>
Cc: Johan Hedberg <johan.hedb...@gmail.com>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Benjamin Tissoires <benjamin.tissoi...@redhat.com>
Cc: linux-blueto...@vger.kernel.org
Cc: net...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: secur...@kernel.org
Cc: kernel-t...@android.com
Acked-by: Kees Cook <keesc...@chromium.org>
Signed-off-by: Marcel Holtmann <mar...@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
net/bluetooth/hidp/core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -416,8 +416,8 @@ static void hidp_del_timer(struct hidp_s
del_timer(&session->timer);
}
-static void hidp_process_report(struct hidp_session *session,
- int type, const u8 *data, int len, int intr)
+static void hidp_process_report(struct hidp_session *session, int type,
+ const u8 *data, unsigned int len, int intr)
{
if (len > HID_MAX_BUFFER_SIZE)
len = HID_MAX_BUFFER_SIZE;
