GSD-2021-1001768 cifs: Fix soft lockup during fsstress

cifs: Fix soft lockup during fsstress This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.14.9 by commit 9f6c7aff21f81ae8856da1f63847d1362d523409...