Re: [PATCH] ksmbd: Prevent integer overflow in calculation of deadtime

On Wed, Apr 9, 2025 at 6:05 PM Denis Arefev arefev@swemel.ru wrote:

The user can set any value for 'deadtime'. This affects the arithmetic expression 'req->deadtime * SMB_ECHO_INTERVAL', which is subject to overflow. The added check makes the server behavior more predictable.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 0626e6641f6b ("cifsd: add server handler for central processing and tranport layers") Cc: stable@vger.kernel.org Signed-off-by: Denis Arefev arefev@swemel.ru

Applied it to #ksmbd-for-next-next. Thanks!