Re: [PATCH] HID: Bluetooth: hidp: buffer overflow in hidp_process_report

[Greg KH]

On Tue, Jul 31, 2018 at 03:02:13PM -0700, Mark Salyzyn wrote:
> 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@xxxxxxxxxxx>
> Fixes: a4b1b5877b514b276f0f31efe02388a9c2836728 ("HID: Bluetooth: hidp: make sure input buffers are big enough")
> Cc: Marcel Holtmann <marcel@xxxxxxxxxxxx>
> Cc: Johan Hedberg <johan.hedberg@xxxxxxxxx>
> Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> Cc: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
> Cc: linux-bluetooth@xxxxxxxxxxxxxxx
> Cc: netdev@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: security@xxxxxxxxxx
> Cc: kernel-team@xxxxxxxxxxx

Nit, you only need to bother security@ if you do not have a fix and need
to figure out one.

Also, you forgot to cc: stable@xxxxxxxxxxxxxxx to be included in older
kernel releases :(

thanks,

greg k-h