kernel/git/stable/linux.git/fs/ksmbd/mgmt, branch master

smb: move client and server files to common directory fs/smb

2023-05-24T21:29:21+00:00

Move CIFS/SMB3 related client and server files (cifs.ko and ksmbd.ko and helper modules) to new fs/smb subdirectory: fs/cifs --> fs/smb/client fs/ksmbd --> fs/smb/server fs/smbfs_common --> fs/smb/common Suggested-by: Linus Torvalds Acked-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix racy issue under cocurrent smb2 tree disconnect

2023-05-04T04:03:02+00:00

There is UAF issue under cocurrent smb2 tree disconnect. This patch introduce TREE_CONN_EXPIRE flags for tcon to avoid cocurrent access. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20592 Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix racy issue from smb2 close and logoff with multichannel

2023-05-04T04:03:02+00:00

When smb client send concurrent smb2 close and logoff request with multichannel connection, It can cause racy issue. logoff request free tcon and can cause UAF issues in smb2 close. When receiving logoff request with multichannel, ksmbd should wait until all remaning requests complete as well as ones in the current connection, and then make session expired. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20796 ZDI-CAN-20595 Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: destroy expired sessions

2023-05-04T04:03:01+00:00

client can indefinitely send smb2 session setup requests with the SessionId set to 0, thus indefinitely spawning new sessions, and causing indefinite memory usage. This patch limit to the number of sessions using expired timeout and session state. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20478 Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix racy issue from session setup and logoff

2023-05-04T04:03:01+00:00

This racy issue is triggered by sending concurrent session setup and logoff requests. This patch does not set connection status as KSMBD_SESS_GOOD if state is KSMBD_SESS_NEED_RECONNECT in session setup. And relookup session to validate if session is deleted in logoff. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20481, ZDI-CAN-20590, ZDI-CAN-20596 Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: Implements sess->rpc_handle_list as xarray

2023-01-30T00:10:42+00:00

For some ops on rpc handle: 1. ksmbd_session_rpc_method(), possibly on high frequency. 2. ksmbd_session_rpc_close(). id is used as indexing key to lookup channel, in that case, linear search based on list may suffer a bit for performance. Implements sess->rpc_handle_list as xarray. Signed-off-by: Dawei Li Acked-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: Implements sess->ksmbd_chann_list as xarray

2023-01-30T00:10:38+00:00

For some ops on channel: 1. lookup_chann_list(), possibly on high frequency. 2. ksmbd_chann_del(). Connection is used as indexing key to lookup channel, in that case, linear search based on list may suffer a bit for performance. Implements sess->ksmbd_chann_list as xarray. Signed-off-by: Dawei Li Acked-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: Fix resource leak in ksmbd_session_rpc_open()

2022-12-11T14:33:31+00:00

When ksmbd_rpc_open() fails then it must call ksmbd_rpc_id_free() to undo the result of ksmbd_ipc_id_alloc(). Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Signed-off-by: Xiu Jianfeng Acked-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: validate share name from share config response

2022-10-05T06:15:44+00:00

Share config response may contain the share name without casefolding as it is known to the user space daemon. When it is present, casefold and compare it to the share name the share config request was made with. If they differ, we have a share config which is incompatible with the way share config caching is done. This is the case when CONFIG_UNICODE is not set, the share name contains non-ASCII characters, and those non- ASCII characters do not match those in the share name known to user space. In other words, when CONFIG_UNICODE is not set, UTF-8 share names now work but are only case-insensitive in the ASCII range. Signed-off-by: Atte Heikkilä Acked-by: Tom Talpey Acked-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: casefold utf-8 share names and fix ascii lowercase conversion

2022-10-05T06:15:37+00:00

strtolower() corrupts all UTF-8 share names that have a byte in the C0 (À ISO8859-1) to DE (Þ ISO8859-1) range, since the non-ASCII part of ISO8859-1 is incompatible with UTF-8. Prevent this by checking that a byte is in the ASCII range with isascii(), before the conversion to lowercase with tolower(). Properly handle case-insensitivity of UTF-8 share names by casefolding them, but fallback to ASCII lowercase conversion on failure or if CONFIG_UNICODE is not set. Refactor to move the share name casefolding immediately after the share name extraction. Also, make the associated constness corrections. Signed-off-by: Atte Heikkilä Acked-by: Namjae Jeon Signed-off-by: Steve French