CVE-2024-50121 nfsd: cancel nfsd_shrinker_work using sync mode in nfs4_state_shutdown_net

In the Linux kernel, the following vulnerability has been resolved: nfsd: cancel nfsdshrinkerwork using sync mode in nfs4stateshutdownnet In the normal case, when we excute echo 0 /proc/fs/nfsd/threads, the function nfs4statedestroynet in nfs4stateshutdownnet will release all resources related to...