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2021-11-25ksmbd: fix memleak in get_file_stream_info()Namjae Jeon
Fix memleak in get_file_stream_info() Fixes: 34061d6b76a4 ("ksmbd: validate OutputBufferLength of QUERY_DIR, QUERY_INFO, IOCTL requests") Cc: stable@vger.kernel.org # v5.15 Reported-by: Coverity Scan <scan-admin@coverity.com> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-25ksmbd: contain default data stream even if xattr is emptyNamjae Jeon
If xattr is not supported like exfat or fat, ksmbd server doesn't contain default data stream in FILE_STREAM_INFORMATION response. It will cause ppt or doc file update issue if local filesystem is such as ones. This patch move goto statement to contain it. Fixes: 9f6323311c70 ("ksmbd: add default data stream name in FILE_STREAM_INFORMATION") Cc: stable@vger.kernel.org # v5.15 Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-25ksmbd: downgrade addition info error msg to debug in smb2_get_info_sec()Namjae Jeon
While file transfer through windows client, This error flood message happen. This flood message will cause performance degradation and misunderstand server has problem. Fixes: e294f78d3478 ("ksmbd: allow PROTECTED_DACL_SECINFO and UNPROTECTED_DACL_SECINFO addition information in smb2 set info security") Cc: stable@vger.kernel.org # v5.15 Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-25ksmbd: Fix an error handling path in 'smb2_sess_setup()'Christophe JAILLET
All the error handling paths of 'smb2_sess_setup()' end to 'out_err'. All but the new error handling path added by the commit given in the Fixes tag below. Fix this error handling path and branch to 'out_err' as well. Fixes: 0d994cd482ee ("ksmbd: add buffer validation in session setup") Cc: stable@vger.kernel.org # v5.15 Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: Use the SMB3_Create definitions from the sharedRonnie Sahlberg
Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: Move more definitions into the shared areaRonnie Sahlberg
Move SMB2_SessionSetup, SMB2_Close, SMB2_Read, SMB2_Write and SMB2_ChangeNotify commands into smbfs_common/smb2pdu.h Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: use the common definitions for NEGOTIATE_PROTOCOLRonnie Sahlberg
Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: switch to use shared definitions where availableRonnie Sahlberg
Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: change LeaseKey data type to u8 arrayNamjae Jeon
cifs define LeaseKey as u8 array in structure. To move lease structure to smbfs_common, ksmbd change LeaseKey data type to u8 array. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: remove smb2_buf_length in smb2_transform_hdrNamjae Jeon
To move smb2_transform_hdr to smbfs_common, This patch remove smb2_buf_length variable in smb2_transform_hdr. Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: remove smb2_buf_length in smb2_hdrNamjae Jeon
To move smb2_hdr to smbfs_common, This patch remove smb2_buf_length variable in smb2_hdr. Also, declare smb2_get_msg function to get smb2 request/response from ->request/response_buf. Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: remove md4 leftoversNamjae Jeon
As NTLM authentication is removed, md4 is no longer used. ksmbd remove md4 leftovers, i.e. select CRYPTO_MD4, MODULE_SOFTDEP md4. Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-11ksmbd: set unique value to volume serial field in FS_VOLUME_INFORMATIONNamjae Jeon
Steve French reported ksmbd set fixed value to volume serial field in FS_VOLUME_INFORMATION. Volume serial value needs to be set to a unique value for client fscache. This patch set crc value that is generated with share name, path name and netbios name to volume serial. Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org # v5.15 Reported-by: Steve French <smfrench@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-06ksmbd: don't need 8byte alignment for request length in ksmbd_check_messageNamjae Jeon
When validating request length in ksmbd_check_message, 8byte alignment is not needed for compound request. It can cause wrong validation of request length. Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3") Cc: stable@vger.kernel.org # v5.15 Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-06ksmbd: Fix buffer length check in fsctl_validate_negotiate_info()Marios Makassikis
The validate_negotiate_info_req struct definition includes an extra field to access the data coming after the header. This causes the check in fsctl_validate_negotiate_info() to count the first element of the array twice. This in turn makes some valid requests fail, depending on whether they include padding or not. Fixes: f7db8fd03a4b ("ksmbd: add validation in smb2_ioctl") Cc: stable@vger.kernel.org # v5.15 Acked-by: Namjae Jeon <linkinjeon@kernel.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-06ksmbd: Remove redundant 'flush_workqueue()' callsChristophe JAILLET
'destroy_workqueue()' already drains the queue before destroying it, so there is no need to flush it explicitly. Remove the redundant 'flush_workqueue()' calls. This was generated with coccinelle: @@ expression E; @@ - flush_workqueue(E); destroy_workqueue(E); Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-06ksmdb: use cmd helper variable in smb2_get_ksmbd_tcon()Ralph Boehme
Use cmd helper variable in smb2_get_ksmbd_tcon(). Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Steve French <smfrench@gmail.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ralph Boehme <slow@samba.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-06ksmbd: use ksmbd_req_buf_next() in ksmbd_smb2_check_message()Ralph Boehme
Use ksmbd_req_buf_next() in ksmbd_smb2_check_message(). Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Steve French <smfrench@gmail.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ralph Boehme <slow@samba.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-06ksmbd: use ksmbd_req_buf_next() in ksmbd_verify_smb_message()Ralph Boehme
Use ksmbd_req_buf_next() in ksmbd_verify_smb_message(). Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ralph Boehme <slow@samba.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-20ksmbd: add buffer validation in session setupMarios Makassikis
Make sure the security buffer's length/offset are valid with regards to the packet length. Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-20ksmbd: throttle session setup failures to avoid dictionary attacksNamjae Jeon
To avoid dictionary attacks (repeated session setups rapidly sent) to connect to server, ksmbd make a delay of a 5 seconds on session setup failure to make it harder to send enough random connection requests to break into a server if a user insert the wrong password 10 times in a row. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-20ksmbd: validate OutputBufferLength of QUERY_DIR, QUERY_INFO, IOCTL requestsHyunchul Lee
Validate OutputBufferLength of QUERY_DIR, QUERY_INFO, IOCTL requests and check the free size of response buffer for these requests. Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-15ksmbd: validate credit charge after validating SMB2 PDU body sizeRalph Boehme
smb2_validate_credit_charge() accesses fields in the SMB2 PDU body, but until smb2_calc_size() is called the PDU has not yet been verified to be large enough to access the PDU dynamic part length field. Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Ralph Boehme <slow@samba.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-15ksmbd: add buffer validation for smb directHyunchul Lee
Add buffer validation for smb direct. Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-15ksmbd: limit read/write/trans buffer size not to exceed 8MBNamjae Jeon
ksmbd limit read/write/trans buffer size not to exceed maximum 8MB. And set the minimum value of max response buffer size to 64KB. Windows client doesn't send session setup request if ksmbd set max trans/read/write size lower than 64KB in smb2 negotiate. It means windows allow at least 64 KB or more about this value. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-13ksmbd: validate compound response bufferNamjae Jeon
Add the check to validate compound response buffer. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-13ksmbd: fix potencial 32bit overflow from data area check in smb2_writeNamjae Jeon
DataOffset and Length validation can be potencial 32bit overflow. This patch fix it. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-13ksmbd: improve credits managementHyunchul Lee
* Requests except READ, WRITE, IOCTL, INFO, QUERY DIRECOTRY, CANCEL must consume one credit. * If client's granted credits are insufficient, refuse to handle requests. * Windows server 2016 or later grant up to 8192 credits to clients at once. Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-13ksmbd: add validation in smb2_ioctlNamjae Jeon
Add validation for request/response buffer size check in smb2_ioctl and fsctl_copychunk() take copychunk_ioctl_req pointer and the other arguments instead of smb2_ioctl_req structure and remove an unused smb2_ioctl_req argument of fsctl_validate_negotiate_info. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Steve French <smfrench@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-07ksmbd: fix oops from fuse driverNamjae Jeon
Marios reported kernel oops from fuse driver when ksmbd call mark_inode_dirty(). This patch directly update ->i_ctime after removing mark_inode_ditry() and notify_change will put inode to dirty list. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Hyunchul Lee <hyc.lee@gmail.com> Reported-by: Marios Makassikis <mmakassikis@freebox.fr> Tested-by: Marios Makassikis <mmakassikis@freebox.fr> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-07ksmbd: fix version mismatch with out of treeNamjae Jeon
Fix version mismatch with out of tree, This updated version will be matched with ksmbd-tools. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Steve French <smfrench@gmail.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-07ksmbd: use buf_data_size instead of recalculation in smb3_decrypt_req()Namjae Jeon
Tom suggested to use buf_data_size that is already calculated, to verify these offsets. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Suggested-by: Tom Talpey <tom@talpey.com> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-07ksmbd: remove the leftover of smb2.0 dialect supportNamjae Jeon
Although ksmbd doesn't send SMB2.0 support in supported dialect list of smb negotiate response, There is the leftover of smb2.0 dialect. This patch remove it not to support SMB2.0 in ksmbd. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-07ksmbd: check strictly data area in ksmbd_smb2_check_message()Namjae Jeon
When invalid data offset and data length in request, ksmbd_smb2_check_message check strictly and doesn't allow to process such requests. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Reviewed-by: Ralph Boehme <slow@samba.org> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-10-06ksmbd: add the check to vaildate if stream protocol length exceeds maximum valueNamjae Jeon
This patch add MAX_STREAM_PROT_LEN macro and check if stream protocol length exceeds maximum value. opencode pdu size check in ksmbd_pdu_size_has_room(). Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-30ksmbd: missing check for NULL in convert_to_nt_pathname()Dan Carpenter
The kmalloc() does not have a NULL check. This code can be re-written slightly cleaner to just use the kstrdup(). Fixes: 265fd1991c1d ("ksmbd: use LOOKUP_BENEATH to prevent the out of share access") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-30ksmbd: fix transform header validationNamjae Jeon
Validate that the transform and smb request headers are present before checking OriginalMessageSize and SessionId fields. Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Tom Talpey <tom@talpey.com> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-30ksmbd: add buffer validation for SMB2_CREATE_CONTEXTHyunchul Lee
Add buffer validation for SMB2_CREATE_CONTEXT. Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Reviewed-by: Ralph Boehme <slow@samba.org> Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-30ksmbd: add validation in smb2 negotiateNamjae Jeon
This patch add validation to check request buffer check in smb2 negotiate and fix null pointer deferencing oops in smb3_preauth_hash_rsp() that found from manual test. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Hyunchul Lee <hyc.lee@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Reviewed-by: Ralph Boehme <slow@samba.org> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-30ksmbd: add request buffer validation in smb2_set_infoNamjae Jeon
Add buffer validation in smb2_set_info, and remove unused variable in set_file_basic_info. and smb2_set_info infolevel functions take structure pointer argument. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Reviewed-by: Ralph Boehme <slow@samba.org> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-30ksmbd: use correct basic info level in set_file_basic_info()Namjae Jeon
Use correct basic info level in set/get_file_basic_info(). Reviewed-by: Ralph Boehme <slow@samba.org> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-29ksmbd: remove NTLMv1 authenticationNamjae Jeon
Remove insecure NTLMv1 authentication. Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Reviewed-by: Tom Talpey <tom@talpey.com> Acked-by: Steve French <smfrench@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-28ksmbd: fix documentation for 2 functionsEnzo Matsumiya
ksmbd_kthread_fn() and create_socket() returns 0 or error code, and not task_struct/ERR_PTR. Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-26ksmbd: fix invalid request buffer access in compoundNamjae Jeon
Ronnie reported invalid request buffer access in chained command when inserting garbage value to NextCommand of compound request. This patch add validation check to avoid this issue. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Tested-by: Steve French <smfrench@gmail.com> Reviewed-by: Steve French <smfrench@gmail.com> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-26ksmbd: remove RFC1002 check in smb2 requestRonnie Sahlberg
In smb_common.c you have this function : ksmbd_smb_request() which is called from connection.c once you have read the initial 4 bytes for the next length+smb2 blob. It checks the first byte of this 4 byte preamble for valid values, i.e. a NETBIOSoverTCP SESSION_MESSAGE or a SESSION_KEEP_ALIVE. We don't need to check this for ksmbd since it only implements SMB2 over TCP port 445. The netbios stuff was only used in very old servers when SMB ran over TCP port 139. Now that we run over TCP port 445, this is actually not a NB header anymore and you can just treat it as a 4 byte length field that must be less than 16Mbyte. and remove the references to the RFC1002 constants that no longer applies. Cc: Tom Talpey <tom@talpey.com> Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Steve French <smfrench@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Acked-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-24ksmbd: use LOOKUP_BENEATH to prevent the out of share accessHyunchul Lee
instead of removing '..' in a given path, call kern_path with LOOKUP_BENEATH flag to prevent the out of share access. ran various test on this: smb2-cat-async smb://127.0.0.1/homes/../out_of_share smb2-cat-async smb://127.0.0.1/homes/foo/../../out_of_share smbclient //127.0.0.1/homes -c "mkdir ../foo2" smbclient //127.0.0.1/homes -c "rename bar ../bar" Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Boehme <slow@samba.org> Tested-by: Steve French <smfrench@gmail.com> Tested-by: Namjae Jeon <linkinjeon@kernel.org> Acked-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-22ksmbd: remove follow symlinks supportNamjae Jeon
Use LOOKUP_NO_SYMLINKS flags for default lookup to prohibit the middle of symlink component lookup and remove follow symlinks parameter support. We re-implement it as reparse point later. Test result: smbclient -Ulinkinjeon%1234 //172.30.1.42/share -c "get hacked/passwd passwd" NT_STATUS_OBJECT_NAME_NOT_FOUND opening remote file \hacked\passwd Cc: Ralph Böhme <slow@samba.org> Cc: Steve French <smfrench@gmail.com> Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-22ksmbd: check protocol id in ksmbd_verify_smb_message()Namjae Jeon
When second smb2 pdu has invalid protocol id, ksmbd doesn't detect it and allow to process smb2 request. This patch add the check it in ksmbd_verify_smb_message() and don't use protocol id of smb2 request as protocol id of response. Reviewed-by: Ronnie Sahlberg <ronniesahlberg@gmail.com> Reviewed-by: Ralph Böhme <slow@samba.org> Reported-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-21ksmbd: add default data stream name in FILE_STREAM_INFORMATIONNamjae Jeon
Windows client expect to get default stream name(::DATA) in FILE_STREAM_INFORMATION response even if there is no stream data in file. This patch fix update failure when writing ppt or doc files. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Reviewed-By: Tom Talpey <tom@talpey.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-21ksmbd: log that server is experimental at module loadSteve French
While we are working through detailed security reviews of ksmbd server code we should remind users that it is an experimental module by adding a warning when the module loads. Currently the module shows as experimental in Kconfig and is disabled by default, but we don't want to confuse users. Although ksmbd passes a wide variety of the important functional tests (since initial focus had been largely on functional testing such as smbtorture, xfstests etc.), and ksmbd has added key security features (e.g. GCM256 encryption, Kerberos support), there are ongoing detailed reviews of the code base for path processing and network buffer decoding, and this patch reminds users that the module should be considered "experimental." Reviewed-by: Namjae Jeon <linkinjeon@kernel.org> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
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