Shyam Prasad N 5eef12c4e3 cifs: fix lock ordering while disabling multichannel ... The code to handle the case of server disabling multichannel was picking iface_lock with chan_lock held. This goes against the lock ordering rules, as iface_lock is a higher order lock (even if it isn't so obvious). This change fixes the lock ordering by doing the following in that order for each secondary channel: 1. store iface and server pointers in local variable 2. remove references to iface and server in channels 3. unlock chan_lock 4. lock iface_lock 5. dec ref count for iface 6. unlock iface_lock 7. dec ref count for server 8. lock chan_lock again Since this function can only be called in smb2_reconnect, and that cannot be called by two parallel processes, we should not have races due to dropping chan_lock between steps 3 and 8. Fixes: ee1d21794e ("cifs: handle when server stops supporting multichannel") Reported-by: Paulo Alcantara <pc@manguebit.com> Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>		2023-11-14 11:39:35 -06:00
..
asn1.c
cached_dir.c	smb: client: fix use-after-free in smb2_query_info_compound()	2023-11-02 08:06:06 -05:00
cached_dir.h	smb: client: make laundromat a delayed worker	2023-10-12 09:41:04 -05:00
cifs_debug.c	cifs: distribute channels across interfaces based on speed	2023-11-09 10:25:17 -06:00
cifs_debug.h
cifs_fs_sb.h
cifs_ioctl.h	smb3: allow dumping session and tcon id to improve stats analysis and debugging	2023-11-10 02:00:30 -06:00
cifs_spnego_negtokeninit.asn1
cifs_spnego.c	cifs: spnego: add ';' in HOST_KEY_LEN	2023-11-13 16:21:34 -06:00
cifs_spnego.h
cifs_swn.c
cifs_swn.h
cifs_unicode.c	fs/smb/client: Use common code in client	2023-08-30 08:55:52 -05:00
cifs_unicode.h	fs/smb/client: Use common code in client	2023-08-30 08:55:52 -05:00
cifsacl.c
cifsacl.h
cifsencrypt.c
cifsfs.c	smb3: fix touch -h of symlink	2023-10-22 19:03:41 -05:00
cifsfs.h	cifs: update internal module version number for cifs.ko	2023-11-10 09:33:26 -06:00
cifsglob.h	cifs: handle when server stops supporting multichannel	2023-11-10 09:33:19 -06:00
cifspdu.h	smb3: fix creating FIFOs when mounting with "sfu" mount option	2023-10-31 12:23:11 -05:00
cifsproto.h	cifs: handle when server stops supporting multichannel	2023-11-10 09:33:19 -06:00
cifsroot.c
cifssmb.c	cifs: fix charset issue in reconnection	2023-07-25 00:31:24 -05:00
connect.c	cifs: fix leak of iface for primary channel	2023-11-14 11:38:00 -06:00
dfs_cache.c	smb: client: ensure to try all targets when finding nested links	2023-08-20 16:05:50 -05:00
dfs_cache.h	smb: client: ensure to try all targets when finding nested links	2023-08-20 16:05:50 -05:00
dfs.c	smb: client: fix mount when dns_resolver key is not available	2023-11-09 12:59:36 -06:00
dfs.h	smb: client: get rid of dfs code dep in namespace.c	2023-08-20 16:05:50 -05:00
dir.c	smb: client: get rid of dfs naming in automount code	2023-08-20 16:05:50 -05:00
dns_resolve.c
dns_resolve.h
export.c	exportfs: make ->encode_fh() a mandatory method for NFS export	2023-10-28 16:15:15 +02:00
file.c	client: convert to new timestamp accessors	2023-10-18 14:08:27 +02:00
fs_context.c	fs/smb/client: Reset password pointer to NULL	2023-09-28 14:49:51 -05:00
fs_context.h	smb: client: fix mount when dns_resolver key is not available	2023-11-09 12:59:36 -06:00
fscache.c	smb: propagate error code of extract_sharename()	2023-08-30 23:38:49 -05:00
fscache.h	client: convert to new timestamp accessors	2023-10-18 14:08:27 +02:00
inode.c	15 cifs client fixes	2023-11-04 09:13:50 -10:00
ioctl.c	Missing field not being returned in ioctl CIFS_IOC_GET_MNT_INFO	2023-11-10 09:32:04 -06:00
Kconfig	fs/smb/client: Use common code in client	2023-08-30 08:55:52 -05:00
link.c	smb: use crypto_shash_digest() in symlink_hash()	2023-10-31 12:38:26 -05:00
Makefile	smb: client: get rid of dfs code dep in namespace.c	2023-08-20 16:05:50 -05:00
misc.c	smb3: do not start laundromat thread when dir leases	2023-09-19 13:32:02 -05:00
namespace.c	smb: client: fix mount when dns_resolver key is not available	2023-11-09 12:59:36 -06:00
netlink.c
netlink.h
netmisc.c
nterr.c
nterr.h
ntlmssp.h	cifs: Add client version details to NTLM authenticate message	2023-10-22 19:03:42 -05:00
readdir.c	smb: cilent: set reparse mount points as automounts	2023-08-20 16:05:50 -05:00
rfc1002pdu.h
sess.c	cifs: fix lock ordering while disabling multichannel	2023-11-14 11:39:35 -06:00
smb1ops.c	smb: client: do not query reparse points twice on symlinks	2023-08-20 16:05:50 -05:00
smb2file.c
smb2glob.h
smb2inode.c	smb: client: handle STATUS_IO_REPARSE_TAG_NOT_HANDLED	2023-09-20 16:12:09 -05:00
smb2maperror.c	smb3: remove duplicate error mapping	2023-09-20 16:04:51 -05:00
smb2misc.c	smb: client: fix potential deadlock when releasing mids	2023-10-31 12:38:02 -05:00
smb2ops.c	cifs: account for primary channel in the interface list	2023-11-09 10:25:19 -06:00
smb2pdu.c	cifs: handle when server stops supporting multichannel	2023-11-10 09:33:19 -06:00
smb2pdu.h
smb2proto.h	smb: client: move some params to cifs_open_info_data	2023-08-20 16:05:50 -05:00
smb2status.h
smb2transport.c	cifs: fix check of rc in function generate_smb3signingkey	2023-11-13 16:22:30 -06:00
smbdirect.c	smb3: Add dynamic trace points for RDMA (smbdirect) reconnect	2023-09-19 11:03:24 -05:00
smbdirect.h
smbencrypt.c
smberr.h
trace.c
trace.h	smb3: Add dynamic trace points for RDMA (smbdirect) reconnect	2023-09-19 11:03:24 -05:00
transport.c	cifs: handle when server stops supporting multichannel	2023-11-10 09:33:19 -06:00
unc.c
winucase.c
xattr.c	smb3: fix caching of ctime on setxattr	2023-11-09 10:25:58 -06:00