Mike Snitzer 65f2a5c366 nfs_common: fix race in NFS calls to nfsd_file_put_local() and nfsd_serv_put() ... Add nfs_to_nfsd_file_put_local() interface to fix race with nfsd module unload. Similarly, use RCU around nfs_open_local_fh()'s error path call to nfs_to->nfsd_serv_put(). Holding RCU ensures that NFS will safely _call and return_ from its nfs_to calls into the NFSD functions nfsd_file_put_local() and nfsd_serv_put(). Otherwise, if RCU isn't used then there is a narrow window when NFS's reference for the nfsd_file and nfsd_serv are dropped and the NFSD module could be unloaded, which could result in a crash from the return instruction for either nfs_to->nfsd_file_put_local() or nfs_to->nfsd_serv_put(). Reported-by: NeilBrown <neilb@suse.de> Signed-off-by: Mike Snitzer <snitzer@kernel.org> Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>		2024-10-03 16:19:43 -04:00
..
common.c	nfs_common: factor out nfs4_errtbl and nfs4_stat_to_errno	2024-09-23 15:03:29 -04:00
grace.c	fs: nfs: add missing MODULE_DESCRIPTION() macros	2024-07-08 13:47:24 -04:00
Makefile	nfs_common: add NFS LOCALIO auxiliary protocol enablement	2024-09-23 15:03:30 -04:00
nfs_ssc.c	NFSv4.2: remove MODULE_LICENSE in non-modules	2023-04-13 13:13:52 -07:00
nfsacl.c	fs: nfs: add missing MODULE_DESCRIPTION() macros	2024-07-08 13:47:24 -04:00
nfslocalio.c	nfs_common: fix race in NFS calls to nfsd_file_put_local() and nfsd_serv_put()	2024-10-03 16:19:43 -04:00