Messages in this thread Patch in this message |  | | From | Ben Hutchings <> | Date | Sat, 22 Sep 2018 01:15:42 +0100 | Subject | [PATCH 3.16 21/63] Bluetooth: hidp: buffer overflow in hidp_process_report |
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3.16.58-rc1 review patch. If anyone has any objections, please let me know.
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From: Mark Salyzyn <salyzyn@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 <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: Ben Hutchings <ben@decadent.org.uk> --- 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 @@ -429,8 +429,8 @@ 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;
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