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8da33fd11c
linux/fs/cifs
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Shyam Prasad N 8da33fd11c cifs: avoid deadlocks while updating iface 
We use cifs_tcp_ses_lock to protect a lot of things.
Not only does it protect the lists of connections, sessions,
tree connects, open file lists, etc., we also use it to
protect some fields in each of it's entries.

In this case, cifs_mark_ses_for_reconnect takes the
cifs_tcp_ses_lock to traverse the lists, and then calls
cifs_update_iface. However, that can end up calling
cifs_put_tcp_session, which picks up the same lock again.

Avoid this by taking a ref for the session, drop the lock,
and then call update iface.

Also, in cifs_update_iface, avoid nested locking of iface_lock
and chan_lock, as much as possible. When unavoidable, we need
to pick iface_lock first.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2022-06-24 09:17:56 -05:00
..
asn1.c cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cifs_debug.c cifs: change iface_list from array to sorted linked list 2022-06-22 19:51:43 -05:00
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 2021-11-10 16:30:13 -06:00
cifs_fs_sb.h cifs: support nested dfs links over reconnect 2021-11-10 16:30:13 -06:00
cifs_ioctl.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_spnego.c cifs: use the chans_need_reconnect bitmap for reconnect status 2022-01-02 20:38:46 -06:00
cifs_spnego.h cifs: use the chans_need_reconnect bitmap for reconnect status 2022-01-02 20:38:46 -06:00
cifs_swn.c cifs: fix potential deadlock in direct reclaim 2022-06-01 00:03:18 -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 2022-02-14 09:55:51 -06:00
cifsacl.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsencrypt.c cifs: fix potential deadlock in direct reclaim 2022-06-01 00:03:18 -05:00
cifsfs.c 3 smb3 reconnect fixes 2022-06-12 11:05:44 -07:00
cifsfs.h cifs: fix reconnect on smb3 mount types 2022-06-06 01:04:12 -05:00
cifsglob.h cifs: periodically query network interfaces from server 2022-06-22 19:51:43 -05:00
cifspdu.h smb3: move defines for query info and query fsinfo to smbfs_common 2022-03-26 23:09:51 -05:00
cifsproto.h cifs: periodically query network interfaces from server 2022-06-22 19:51:43 -05:00
cifsroot.c cifs: Standardize logging output 2020-06-01 00:10:18 -05:00
cifssmb.c cifs: use new enum for ses_status 2022-05-24 14:11:17 -05:00
connect.c cifs: avoid deadlocks while updating iface 2022-06-24 09:17:56 -05:00
dfs_cache.c cifs: fix uninitialized pointer in error case in dfs_cache_get_tgt_share 2022-06-04 13:33:42 -05:00
dfs_cache.h cifs: support share failover when remounting 2021-07-22 11:43:23 -05:00
dir.c cifs: Support fscache indexing rewrite 2022-01-19 11:21:08 -06:00
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 netfs: Fix gcc-12 warning by embedding vfs inode in netfs_i_context 2022-06-09 13:55:00 -07:00
fs_context.c cifs: fix ntlmssp on old servers 2022-05-25 07:41:22 -05:00
fs_context.h cifs: fix ntlmssp on old servers 2022-05-25 07:41:22 -05:00
fscache.c netfs: Fix gcc-12 warning by embedding vfs inode in netfs_i_context 2022-06-09 13:55:00 -07:00
fscache.h netfs: Further cleanups after struct netfs_inode wrapper introduced 2022-06-10 20:55:21 +01:00
inode.c netfs: Fix gcc-12 warning by embedding vfs inode in netfs_i_context 2022-06-09 13:55:00 -07:00
ioctl.c cifs: fix incorrect kernel doc comments 2021-09-13 18:29:46 -05:00
Kconfig cifs: Support fscache indexing rewrite 2022-01-19 11:21:08 -06:00
link.c cifs: potential buffer overflow in handling symlinks 2022-04-13 12:00:49 -05:00
Makefile cifs: do not build smb1ops if legacy support is disabled 2022-06-01 21:49:27 -05:00
misc.c cifs: change iface_list from array to sorted linked list 2022-06-22 19:51:43 -05:00
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: fix potential race with cifsd thread 2022-04-04 12:01:22 -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 treewide: Replace zero-length arrays with flexible-array members 2022-02-17 07:00:39 -06:00
readdir.c smb3: remove unneeded null check in cifs_readdir 2022-05-27 12:05:47 -05:00
rfc1002pdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
sess.c cifs: avoid deadlocks while updating iface 2022-06-24 09:17:56 -05:00
smb1ops.c cifs: fix potential deadlock in direct reclaim 2022-06-01 00:03:18 -05:00
smb2file.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2glob.h smb3: move defines for ioctl protocol header and SMB2 sizes to smbfs_common 2022-03-26 23:09:20 -05:00
smb2inode.c cifs: set the CREATE_NOT_FILE when opening the directory in use_cached_dir() 2022-05-21 12:23:24 -05:00
smb2maperror.c cifs: Create a new shared file holding smb2 pdu definitions 2021-11-05 09:50:57 -05:00
smb2misc.c smb3: add trace point for oplock not found 2022-05-22 00:46:08 -05:00
smb2ops.c cifs: periodically query network interfaces from server 2022-06-22 19:51:43 -05:00
smb2pdu.c smb3: use netname when available on secondary channels 2022-06-22 19:46:53 -05:00
smb2pdu.h Add various fsctl structs 2022-05-23 20:24:12 -05:00
smb2proto.h cifs: convert the path to utf16 in smb2_query_info_compound 2022-03-23 15:17:22 -05:00
smb2status.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2transport.c cifs: use new enum for ses_status 2022-05-24 14:11:17 -05:00
smbdirect.c cifs: fix potential deadlock in direct reclaim 2022-06-01 00:03:18 -05:00
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 smb3: add trace point for SMB2_set_eof 2022-06-16 18:07:10 -05:00
transport.c cifs: fix potential deadlock in direct reclaim 2022-06-01 00:03:18 -05:00
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 2022-02-13 14:56:34 -06:00