5d5f08fd0c
A malicious user could pass an arbitrarily bad value to memdup_user_nul(), potentially causing kernel crash. This follows the same pattern as commitee76746387("netdevsim: prevent bad user input in nsim_dev_health_break_write()") Fixes:b6c7e873da("xtensa: ISS: add host file-based simulated disk") Fixes:16e5c1fc36("convert a bunch of open-coded instances of memdup_user_nul()") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Message-Id: <20250829083015.1992751-1-linmq006@gmail.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>