kernel/git/stable/linux.git/fs/ksmbd/auth.c, 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 deadlock in ksmbd_find_crypto_ctx()

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

Deadlock is triggered by sending multiple concurrent session setup requests. It should be reused after releasing when getting ctx for crypto. Multiple consecutive ctx uses cause deadlock while waiting for releasing due to the limited number of ctx. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20591 Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix wrong signingkey creation when encryption is AES256

2023-03-22T21:32:50+00:00

MacOS and Win11 support AES256 encrytion and it is included in the cipher array of encryption context. Especially on macOS, The most preferred cipher is AES256. Connecting to ksmbd fails on newer MacOS clients that support AES256 encryption. MacOS send disconnect request after receiving final session setup response from ksmbd. Because final session setup is signed with signing key was generated incorrectly. For signging key, 'L' value should be initialized to 128 if key size is 16bytes. Cc: stable@vger.kernel.org Reported-by: Miao Lihua <441884205@qq.com> Tested-by: Miao Lihua <441884205@qq.com> Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: check nt_len to be at least CIFS_ENCPWD_SIZE in ksmbd_decode_ntlmssp_auth_blob

2023-01-02T04:49:24+00:00

"nt_len - CIFS_ENCPWD_SIZE" is passed directly from ksmbd_decode_ntlmssp_auth_blob to ksmbd_auth_ntlmv2. Malicious requests can set nt_len to less than CIFS_ENCPWD_SIZE, which results in a negative number (or large unsigned value) used for a subsequent memcpy in ksmbd_auth_ntlvm2 and can cause a panic. Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org Signed-off-by: William Liu Signed-off-by: Hrvoje Mišetić Acked-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: set NTLMSSP_NEGOTIATE_SEAL flag to challenge blob

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

If NTLMSSP_NEGOTIATE_SEAL flags is set in negotiate blob from client, Set NTLMSSP_NEGOTIATE_SEAL flag to challenge blob. Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix encryption failure issue for session logoff response

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

If client send encrypted session logoff request on seal mount, Encryption for that response fails. ksmbd: Could not get encryption key CIFS: VFS: cifs_put_smb_ses: Session Logoff failure rc=-512 Session lookup fails in ksmbd_get_encryption_key() because sess->state is set to SMB2_SESSION_EXPIRED in session logoff. There is no need to do session lookup again to encrypt the response. This patch change to use ksmbd_session in ksmbd_work. Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix racy issue while destroying session on multichannel

2022-08-01T04:14:32+00:00

After multi-channel connection with windows, Several channels of session are connected. Among them, if there is a problem in one channel, Windows connects again after disconnecting the channel. In this process, the session is released and a kernel oop can occurs while processing requests to other channels. When the channel is disconnected, if other channels still exist in the session after deleting the channel from the channel list in the session, the session should not be released. Finally, the session will be released after all channels are disconnected. Signed-off-by: Namjae Jeon Reviewed-by: Hyunchul Lee Signed-off-by: Steve French

ksmbd: add support for key exchange

2022-02-04T06:12:22+00:00

When mounting cifs client, can see the following warning message. CIFS: decode_ntlmssp_challenge: authentication has been weakened as server does not support key exchange To remove this warning message, Add support for key exchange feature to ksmbd. This patch decrypts 16-byte ciphertext value sent by the client using RC4 with session key. The decrypted value is the recovered secondary key that will use instead of the session key for signing and sealing. Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: fix multi session connection failure

2021-12-29T04:47:22+00:00

When RSS mode is enable, windows client do simultaneously send several session requests to server. There is racy issue using sess->ntlmssp.cryptkey on N connection : 1 session. So authetication failed using wrong cryptkey on some session. This patch move cryptkey to ksmbd_conn structure to use each cryptkey on connection. Tested-by: Ziwei Xie Signed-off-by: Namjae Jeon Signed-off-by: Steve French

ksmbd: remove smb2_buf_length in smb2_transform_hdr

2021-11-12T01:22:58+00:00

To move smb2_transform_hdr to smbfs_common, This patch remove smb2_buf_length variable in smb2_transform_hdr. Cc: Ronnie Sahlberg Signed-off-by: Namjae Jeon Signed-off-by: Steve French