In the Linux kernel, the following vulnerability has been resolved: nfs/localio: restore creds before releasing pageio data Otherwise if the nfsd filecache code releases the nfsd_file immediately, it can trigger the BUG_ON(cred == current->cred) in __put_cred() when it puts the nfsd_file->nf_file->f-cred.
https://git.kernel.org/stable/c/c250be1d75bf80dc5ab46f0b434b746c1868a1ea
https://git.kernel.org/stable/c/992203a1fba51b025c60ec0c8b0d9223343dea95
https://git.kernel.org/stable/c/57c1bb02b4fc8eec6eb01736e7fad26dffacf18c