Hi, Jeff Layton > Hi, > > a nfsd_file_free panic when shudown. > > > > This is a kernel 6.1.1 with some nfsd 6.2 pathes. > > It happened when os shutdown. > > > > but the reproducer is yet not clear. > > we just gather the info of the attachment file. > > Now I can reproduce it. > 1) 'tail -f xxx' to keep a file is open from nfs4 client > 2) 'shutdow -r now' the nfs server. > > more panic info in the attachment files (panic-2.txt/panic-3.txt) > > Best Regards > Wang Yugui (wangyugui@xxxxxxxxxxxx) > 2022/12/22 > > > > > the path list that applied to kernel 6.1.1. > > Subject: nfsd: don't call nfsd_file_put from client states seqfile display > > Subject: NFSD: Pass the target nfsd_file to nfsd_commit() > > Subject: NFSD: Revert "NFSD: NFSv4 CLOSE should release an nfsd_file > > Subject: NFSD: Add an NFSD_FILE_GC flag to enable nfsd_file garbage collection > > Subject: nfsd: fix up the filecache laundrette scheduling > > Subject: NFSD: Flesh out a documenting comment for filecache.c > > Subject: NFSD: Clean up nfs4_preprocess_stateid_op() call sites > > Subject: NFSD: Trace stateids returned via DELEGRETURN > > Subject: NFSD: Trace delegation revocations > > Subject: NFSD: Use const pointers as parameters to fh_ helpers > > Subject: NFSD: Update file_hashtbl() helpers > > Subject: NFSD: Clean up nfsd4_init_file() > > Subject: NFSD: Add a nfsd4_file_hash_remove() helper > > Subject: NFSD: Clean up find_or_add_file() > > Subject: NFSD: Refactor find_file() > > Subject: NFSD: Use rhashtable for managing nfs4_file objects > > Subject: NFSD: Fix licensing header in filecache.c > > Subject: nfsd: remove the pages_flushed statistic from filecache > > Subject: nfsd: reorganize filecache.c > > Subject: NFSD: Add an nfsd_file_fsync tracepoint > > Subject: nfsd: rework refcounting in filecache > > Subject: nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure > > Subject: NFSD: fix use-after-free in __nfs42_ssc_open() > > > > > > It happened just after 'Subject: nfsd: rework refcounting in filecache' > > is added, so this patch maybe related. It is confirmed that this panic is caused by the patch 'nfsd: rework refcounting in filecache'. the problem is 100% reproduced when this patch is applied. the problem is yet not reproduced when this patch is not applied. Best Regards Wang Yugui (wangyugui@xxxxxxxxxxxx) 2022/12/22
