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Jeff Layton 8b69402310 NFSD: verify the opened dentry after setting a delegation 
[ Upstream commit 876c553cb41026cb6ad3cef970a35e5f69c42a25 ]

Between opening a file and setting a delegation on it, someone could
rename or unlink the dentry. If this happens, we do not want to grant a
delegation on the open.

On a CLAIM_NULL open, we're opening by filename, and we may (in the
non-create case) or may not (in the create case) be holding i_rwsem
when attempting to set a delegation.  The latter case allows a
race.

After getting a lease, redo the lookup of the file being opened and
validate that the resulting dentry matches the one in the open file
description.

To properly redo the lookup we need an rqst pointer to pass to
nfsd_lookup_dentry(), so make sure that is available.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-19 12:28:03 +01:00
..
acl.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
auth.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
auth.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blocklayout.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blocklayoutxdr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
blocklayoutxdr.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cache.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
current_stateid.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
export.c nfsd: report per-export stats 2024-11-19 12:27:31 +01:00
export.h nfsd: report per-export stats 2024-11-19 12:27:31 +01:00
fault_inject.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
filecache.c NFSD: Ensure nf_inode is never dereferenced 2024-11-19 12:28:01 +01:00
filecache.h NFSD: Ensure nf_inode is never dereferenced 2024-11-19 12:28:01 +01:00
flexfilelayout.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
flexfilelayoutxdr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
flexfilelayoutxdr.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
idmap.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig NFSD: Remove CONFIG_NFSD_V3 2024-11-19 12:27:54 +01:00
lockd.c Keep read and write fds with each nlm_file 2024-11-19 12:27:44 +01:00
Makefile NFSD: Remove CONFIG_NFSD_V3 2024-11-19 12:27:54 +01:00
netns.h NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2024-11-19 12:28:02 +01:00
nfs2acl.c SUNRPC: Return true/false (not 1/0) from bool functions 2024-11-19 12:27:54 +01:00
nfs3acl.c SUNRPC: Change return value type of .pc_encode 2024-11-19 12:27:48 +01:00
nfs3proc.c NFSD: Refactor NFSv3 CREATE 2024-11-19 12:27:57 +01:00
nfs3xdr.c NFSD: Deprecate NFS_OFFSET_MAX 2024-11-19 12:27:53 +01:00
nfs4acl.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
nfs4callback.c NFSD: Move copy offload callback arguments into a separate structure 2024-11-19 12:28:03 +01:00
nfs4idmap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
nfs4layouts.c nfsd: fix using the correct variable for sizeof() 2024-11-19 12:27:54 +01:00
nfs4proc.c NFSD: verify the opened dentry after setting a delegation 2024-11-19 12:28:03 +01:00
nfs4recover.c nfsd: Log client tracking type log message as info instead of warning 2024-11-19 12:27:36 +01:00
nfs4state.c NFSD: verify the opened dentry after setting a delegation 2024-11-19 12:28:03 +01:00
nfs4xdr.c NFSD: Replace boolean fields in struct nfsd4_copy 2024-11-19 12:28:03 +01:00
nfscache.c nfsd: destroy percpu stats counters after reply cache shutdown 2024-11-19 12:27:58 +01:00
nfsctl.c nfsd: silence extraneous printk on nfsd.ko insertion 2024-11-19 12:28:02 +01:00
nfsd.h NFSD: limit the number of v4 clients to 1024 per 1GB of system memory 2024-11-19 12:28:02 +01:00
nfsfh.c NFSD: Remove CONFIG_NFSD_V3 2024-11-19 12:27:54 +01:00
nfsfh.h NFSD: Remove CONFIG_NFSD_V3 2024-11-19 12:27:54 +01:00
nfsproc.c nfsd: Retry once in nfsd_open on an -EOPENSTALE return 2024-11-19 12:27:52 +01:00
nfssvc.c NFSD: Remove CONFIG_NFSD_V3 2024-11-19 12:27:54 +01:00
nfsxdr.c SUNRPC: Change return value type of .pc_encode 2024-11-19 12:27:48 +01:00
pnfs.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
state.h NFSD: Make nfs4_put_copy() static 2024-11-19 12:28:03 +01:00
stats.c nfsd: make nfsd_stats.th_cnt atomic_t 2024-11-19 12:27:50 +01:00
stats.h nfsd: make nfsd_stats.th_cnt atomic_t 2024-11-19 12:27:50 +01:00
trace.c NFSD: Add SPDX header for fs/nfsd/trace.c 2024-11-19 12:27:20 +01:00
trace.h NFSD: Move nfsd_file_trace_alloc() tracepoint 2024-11-19 12:28:01 +01:00
vfs.c NFSD: Clean up nfsd_open_verified() 2024-11-19 12:27:57 +01:00
vfs.h NFSD: Clean up nfsd_open_verified() 2024-11-19 12:27:57 +01:00
xdr.h SUNRPC: Change return value type of .pc_encode 2024-11-19 12:27:48 +01:00
xdr3.h SUNRPC: Change return value type of .pc_encode 2024-11-19 12:27:48 +01:00
xdr4.h NFSD: verify the opened dentry after setting a delegation 2024-11-19 12:28:03 +01:00
xdr4cb.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00