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linux/fs/nfsd
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Jeff Layton 23ac79e755 nfsd: don't call nfsd_file_put from client states seqfile display 
[ Upstream commit e0aa651068 ]

We had a report of this:

    BUG: sleeping function called from invalid context at fs/nfsd/filecache.c:440

...with a stack trace showing nfsd_file_put being called from
nfs4_show_open. This code has always tried to call fput while holding a
spinlock, but we recently changed this to use the filecache, and that
started triggering the might_sleep() in nfsd_file_put.

states_start takes and holds the cl_lock while iterating over the
client's states, and we can't sleep with that held.

Have the various nfs4_show_* functions instead hold the fi_lock instead
of taking a nfsd_file reference.

Fixes: 78599c42ae ("nfsd4: add file to display list of client's opens")
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2138357
Reported-by: Zhi Li <yieli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-12-31 13:31:58 +01:00
..
acl.h NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
auth.c
auth.h
blocklayout.c block: remove genhd.h 2022-02-02 07:49:59 -07:00
blocklayoutxdr.c
blocklayoutxdr.h
cache.h nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops 2022-09-26 14:02:50 -04:00
current_stateid.h
export.c fs: add is_idmapped_mnt() helper 2021-12-03 18:44:06 +01:00
export.h nfsd: report per-export stats 2021-01-25 09:36:28 -05:00
fault_inject.c nfsd: no need to check return value of debugfs_create functions 2019-07-03 16:57:17 +02:00
filecache.c nfsd: fix use-after-free in nfsd_file_do_acquire tracepoint 2022-11-05 11:29:55 -04:00
filecache.h nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_file_cache_stats_fops 2022-09-26 14:02:50 -04:00
flexfilelayout.c nfsd: use correct format characters 2022-03-17 19:47:38 -04:00
flexfilelayoutxdr.c
flexfilelayoutxdr.h
idmap.h
Kconfig NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
lockd.c NFSD: simplify struct nfsfh 2021-10-02 15:51:10 -04:00
Makefile NFSD: Remove CONFIG_NFSD_V3 2022-03-11 10:25:14 -05:00
netns.h NFSD: add shrinker to reap courtesy clients on low memory condition 2022-09-26 14:02:41 -04:00
nfs2acl.c NFSD: Finish converting the NFSv2 GETACL result encoder 2022-12-31 13:31:58 +01:00
nfs3acl.c NFSD: Finish converting the NFSv3 GETACL result encoder 2022-12-31 13:31:58 +01:00
nfs3proc.c NFSD: Refactor common code out of dirlist helpers 2022-09-26 14:02:47 -04:00
nfs3xdr.c NFSD: Clean up WRITE arg decoders 2022-09-26 14:02:47 -04:00
nfs4acl.c NFSD: add posix ACLs to struct nfsd_attrs 2022-08-04 10:28:03 -04:00
nfs4callback.c nfsd: make nfsd4_run_cb a bool return function 2022-09-26 14:50:57 -04:00
nfs4idmap.c NFSD: move from strlcpy with unused retval to strscpy 2022-09-26 14:02:20 -04:00
nfs4layouts.c NFSD: Add tracepoints to report NFSv4 callback completions 2022-09-26 14:02:32 -04:00
nfs4proc.c NFSD: Cap rsize_bop result based on send buffer size 2022-09-26 14:02:50 -04:00
nfs4recover.c struct file-related stuff 2022-10-06 17:13:18 -07:00
nfs4state.c nfsd: don't call nfsd_file_put from client states seqfile display 2022-12-31 13:31:58 +01:00
nfs4xdr.c NFSD: Clean up nfs4svc_encode_compoundres() 2022-09-26 14:02:48 -04:00
nfscache.c nfsd: use DEFINE_SHOW_ATTRIBUTE to define nfsd_reply_cache_stats_fops 2022-09-26 14:02:50 -04:00
nfsctl.c NFSD: unregister shrinker when nfsd_init_net() fails 2022-10-11 10:08:26 -04:00
nfsd.h NFSD: add shrinker to reap courtesy clients on low memory condition 2022-09-26 14:02:41 -04:00
nfsfh.c nfsd: ensure we always call fh_verify_error tracepoint 2022-10-13 12:12:37 -04:00
nfsfh.h NFSD: discard fh_locked flag and fh_lock/fh_unlock 2022-08-04 10:28:48 -04:00
nfsproc.c NFSD: Refactor common code out of dirlist helpers 2022-09-26 14:02:47 -04:00
nfssvc.c NFSD: move from strlcpy with unused retval to strscpy 2022-09-26 14:02:20 -04:00
nfsxdr.c NFSD: Clean up WRITE arg decoders 2022-09-26 14:02:47 -04:00
pnfs.h
state.h nfsd: make nfsd4_run_cb a bool return function 2022-09-26 14:50:57 -04:00
stats.c nfsd: use DEFINE_PROC_SHOW_ATTRIBUTE to define nfsd_proc_ops 2022-09-26 14:02:49 -04:00
stats.h nfsd: make nfsd_stats.th_cnt atomic_t 2021-12-13 13:42:51 -05:00
trace.c NFSD: Add SPDX header for fs/nfsd/trace.c 2020-11-30 13:00:24 -05:00
trace.h NFSD: Fix trace_nfsd_fh_verify_err() crasher 2022-11-14 08:43:35 -05:00
vfs.c Amir's copy_file_range() fix 2022-11-27 12:40:06 -08:00
vfs.h NFSD: drop fname and flen args from nfsd_create_locked() 2022-09-26 14:02:30 -04:00
xdr3.h SUNRPC: Change return value type of .pc_encode 2021-10-13 11:34:49 -04:00
xdr4.h NFSD: Pack struct nfsd4_compoundres 2022-09-26 14:02:49 -04:00
xdr4cb.h NFSD CB_OFFLOAD xdr 2018-09-25 20:34:54 -04:00
xdr.h NFSD: prevent underflow in nfssvc_decode_writeargs() 2022-03-15 09:35:56 -04:00