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WSL2-Linux-Kernel/fs/cifs
История
Steve French 9fdf3666e3 SMB3: force unmount was failing to close deferred close files 
commit 2cb6f96877 upstream.

In investigating a failure with xfstest generic/392 it
was noticed that mounts were reusing a superblock that should
already have been freed. This turned out to be related to
deferred close files keeping a reference count until the
closetimeo expired.

Currently the only way an fs knows that mount is beginning is
when force unmount is called, but when this, ie umount_begin(),
is called all deferred close files on the share (tree
connection) should be closed immediately (unless shared by
another mount) to avoid using excess resources on the server
and to avoid reusing a superblock which should already be freed.

In umount_begin, close all deferred close handles for that
share if this is the last mount using that share on this
client (ie send the SMB3 close request over the wire for those
that have been already closed by the app but that we have
kept a handle lease open for and have not sent closes to the
server for yet).

Reported-by: David Howells <dhowells@redhat.com>
Acked-by: Bharath SM <bharathsm@microsoft.com>
Cc: <stable@vger.kernel.org>
Fixes: 78c09634f7 ("Cifs: Fix kernel oops caused by deferred close for files.")
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2023-05-17 11:50:23 +02:00
..
Kconfig cifs: create a MD4 module and switch cifs.ko to use it 2021-08-25 15:48:00 -05:00
Makefile cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
asn1.c cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cache.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_debug.c cifs: print session id while listing open files 2023-03-30 12:47:55 +02:00
cifs_debug.h cifs: use SPDX-Licence-Identifier 2021-06-20 21:28:17 -05:00
cifs_dfs_ref.c cifs: support nested dfs links over reconnect 2022-12-02 17:40:59 +01:00
cifs_fs_sb.h cifs: support nested dfs links over reconnect 2022-12-02 17:40:59 +01:00
cifs_ioctl.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_spnego.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_spnego.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_spnego_negtokeninit.asn1 cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cifs_swn.c cifs: remove support for NTLM and weaker authentication algorithms 2021-08-25 15:47:06 -05:00
cifs_swn.h cifs: simplify SWN code with dummy funcs instead of ifdefs 2021-04-25 16:28:22 -05:00
cifs_unicode.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_unicode.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifs_uniupr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifsacl.c cifs: modefromsids must add an ACE for authenticated users 2022-03-08 19:12:30 +01:00
cifsacl.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsencrypt.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsfs.c SMB3: force unmount was failing to close deferred close files 2023-05-17 11:50:23 +02:00
cifsfs.h cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALL 2023-04-05 11:24:59 +02:00
cifsglob.h cifs: fix oops during encryption 2023-01-12 11:58:41 +01:00
cifspdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsproto.h cifs: fix oops during encryption 2023-01-12 11:58:41 +01:00
cifsroot.c cifs: Standardize logging output 2020-06-01 00:10:18 -05:00
cifssmb.c cifs: prevent infinite recursion in CIFSGetDFSRefer() 2023-04-05 11:24:58 +02:00
connect.c smb3: fix problem remounting a share after shutdown 2023-05-17 11:50:23 +02:00
dfs_cache.c cifs: fix return of uninitialized rc in dfs_cache_update_tgthint() 2023-02-06 07:59:00 +01:00
dfs_cache.h cifs: support share failover when remounting 2021-07-22 11:43:23 -05:00
dir.c cifs: Fix xid leak in cifs_create() 2022-10-29 10:12:56 +02:00
dns_resolve.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
dns_resolve.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
export.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
file.c SMB3: Close deferred file handles in case of handle lease break 2023-05-11 23:00:37 +09:00
fs_context.c cifs: sanitize paths in cifs_update_super_prepath. 2023-04-13 16:48:24 +02:00
fs_context.h cifs: sanitize paths in cifs_update_super_prepath. 2023-04-13 16:48:24 +02:00
fscache.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
fscache.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
inode.c cifs: Deferred close performance improvements 2021-09-17 16:39:53 -05:00
ioctl.c cifs: Fix wrong return value checking when GETFLAGS 2022-11-26 09:24:41 +01:00
link.c cifs: Fix uninitialized memory read for smb311 posix symlink create 2023-01-18 11:48:49 +01:00
misc.c SMB3: Close deferred file handles in case of handle lease break 2023-05-11 23:00:37 +09:00
netlink.c cifs: Constify static struct genl_ops 2021-06-20 21:28:16 -05:00
netlink.h cifs: Register generic netlink family 2020-12-14 09:16:22 -06:00
netmisc.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
nterr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
nterr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
ntlmssp.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
readdir.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
rfc1002pdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
sess.c cifs: Fix xid leak in cifs_ses_add_channel() 2022-10-29 10:12:56 +02:00
smb1ops.c cifs: constify path argument of ->make_node() 2021-04-25 16:28:23 -05:00
smb2file.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2glob.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2inode.c cifs: Fix smb2_set_path_size() 2023-03-22 13:31:33 +01:00
smb2maperror.c cifs: cifs_md4 convert to SPDX identifier 2021-08-25 15:51:52 -05:00
smb2misc.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2ops.c cifs: fix pcchunk length type in smb2_copychunk_range 2023-05-17 11:50:22 +02:00
smb2pdu.c cifs: do not include page data when checking signature 2023-01-24 07:22:46 +01:00
smb2pdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2proto.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2status.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2transport.c cifs: return correct error in ->calc_signature() 2022-10-26 12:35:26 +02:00
smbdirect.c cifs: Fix warning and UAF when destroy the MR list 2023-03-10 09:39:32 +01:00
smbdirect.h cifs: smbd: Do not schedule work to send immediate packet on every receive 2020-04-07 12:41:16 -05:00
smbencrypt.c cifs: rename cifs_common to smbfs_common 2021-09-08 23:59:26 -05:00
smberr.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
trace.c smb3: Cleanup license mess 2019-01-24 09:37:33 -06:00
trace.h cifs: fix string declarations and assignments in tracepoints 2021-05-27 14:04:32 -05:00
transport.c cifs: Move the in_send statistic to __smb_send_rqst() 2023-03-22 13:31:22 +01:00
unc.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
winucase.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
xattr.c cifs: fix set of group SID via NTSD xattrs 2022-02-23 12:03:14 +01:00