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authorMark Salyzyn <salyzyn@android.com>2018-07-31 15:02:13 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-08-17 20:54:56 +0200
commitadfdcfe1c7cd5f163855b0d3ea5d3a75efddd576 (patch)
tree1c5ee0b2cfb85121ae3b529aa0a7078c191d481f
parent4b55d18a7b09dae3af7d9b5b69e55b9a0edd5cd7 (diff)
Bluetooth: hidp: buffer overflow in hidp_process_report
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 <salyzyn@android.com> Fixes: a4b1b5877b514b276f0f31efe02388a9c2836728 ("HID: Bluetooth: hidp: make sure input buffers are big enough") Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Kees Cook <keescook@chromium.org> Cc: Benjamin Tissoires <benjamin.tissoires@redhat.com> Cc: linux-bluetooth@vger.kernel.org Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: security@kernel.org Cc: kernel-team@android.com Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/bluetooth/hidp/core.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 9f5273a0be7a..4f41b245ce5b 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -416,8 +416,8 @@ static void hidp_del_timer(struct hidp_session *session)
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;