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path: root/fs/smb/server/auth.c
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2024-12-10ksmbd: fix racy issue from session lookup and expireNamjae Jeon
Increment the session reference count within the lock for lookup to avoid racy issue with session expire. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-25737 Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2024-11-25ksmbd: use __GFP_RETRY_MAYFAILNamjae Jeon
Prefer to report ENOMEM rather than incur the oom for allocations in ksmbd. __GFP_NORETRY could not achieve that, It would fail the allocations just too easily. __GFP_RETRY_MAYFAIL will keep retrying the allocation until there is no more progress and fail the allocation instead go OOM and let the caller to deal with it. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2024-10-11ksmbd: add support for supplementary groupsNamjae Jeon
Even though system user has a supplementary group, It gets NT_STATUS_ACCESS_DENIED when attempting to create file or directory. This patch add KSMBD_EVENT_LOGIN_REQUEST_EXT/RESPONSE_EXT netlink events to get supplementary groups list. The new netlink event doesn't break backward compatibility when using old ksmbd-tools. Co-developed-by: Atte Heikkilä <atteh.mailbox@gmail.com> Signed-off-by: Atte Heikkilä <atteh.mailbox@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2024-01-09ksmbd: auth: fix most kernel-doc warningsRandy Dunlap
Fix 12 of 17 kernel-doc warnings in auth.c: auth.c:221: warning: Function parameter or member 'conn' not described in 'ksmbd_auth_ntlmv2' auth.c:221: warning: Function parameter or member 'cryptkey' not described in 'ksmbd_auth_ntlmv2' auth.c:305: warning: Function parameter or member 'blob_len' not described in 'ksmbd_decode_ntlmssp_auth_blob' auth.c:305: warning: Function parameter or member 'conn' not described in 'ksmbd_decode_ntlmssp_auth_blob' auth.c:305: warning: Excess function parameter 'usr' description in 'ksmbd_decode_ntlmssp_auth_blob' auth.c:385: warning: Function parameter or member 'blob_len' not described in 'ksmbd_decode_ntlmssp_neg_blob' auth.c:385: warning: Function parameter or member 'conn' not described in 'ksmbd_decode_ntlmssp_neg_blob' auth.c:385: warning: Excess function parameter 'rsp' description in 'ksmbd_decode_ntlmssp_neg_blob' auth.c:385: warning: Excess function parameter 'sess' description in 'ksmbd_decode_ntlmssp_neg_blob' auth.c:413: warning: Function parameter or member 'conn' not described in 'ksmbd_build_ntlmssp_challenge_blob' auth.c:413: warning: Excess function parameter 'rsp' description in 'ksmbd_build_ntlmssp_challenge_blob' auth.c:413: warning: Excess function parameter 'sess' description in 'ksmbd_build_ntlmssp_challenge_blob' The other 5 are only present when a W=1 kernel build is done or when scripts/kernel-doc is run with -Wall. They are: auth.c:81: warning: No description found for return value of 'ksmbd_gen_sess_key' auth.c:385: warning: No description found for return value of 'ksmbd_decode_ntlmssp_neg_blob' auth.c:413: warning: No description found for return value of 'ksmbd_build_ntlmssp_challenge_blob' auth.c:577: warning: No description found for return value of 'ksmbd_sign_smb2_pdu' auth.c:628: warning: No description found for return value of 'ksmbd_sign_smb3_pdu' Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Namjae Jeon <linkinjeon@kernel.org> Cc: Steve French <sfrench@samba.org> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Tom Talpey <tom@talpey.com> Cc: linux-cifs@vger.kernel.org Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2023-08-29ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()Namjae Jeon
If authblob->SessionKey.Length is bigger than session key size(CIFS_KEY_SIZE), slub overflow can happen in key exchange codes. cifs_arc4_crypt copy to session key array from SessionKey from client. Cc: stable@vger.kernel.org Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-21940 Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2023-08-29ksmbd: add support for read compoundNamjae Jeon
MacOS sends a compound request including read to the server (e.g. open-read-close). So far, ksmbd has not handled read as a compound request. For compatibility between ksmbd and an OS that supports SMB, This patch provides compound support for read requests. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2023-05-24smb: move client and server files to common directory fs/smbSteve French
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 <torvalds@linux-foundation.org> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>