UPSTREAM: wifi: wilc1000: validate pairwise and authentication suite offsets

commit cd21d99e upstream.

There is no validation of 'offset' which can trigger an out-of-bounds
read when extracting RSN capabilities.

Bug: 263523053
Signed-off-by: Phil Turnbull <philipturnbull@github.com>
Tested-by: Ajay Kathat <ajay.kathat@microchip.com>
Acked-by: Ajay Kathat <ajay.kathat@microchip.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221123153543.8568-2-philipturnbull@github.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I2127fbc561dc2459fbdf496c68db0f3eb91d0363