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path: root/fs/ksmbd/smb2pdu.c
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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: 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: 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: 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>
2021-11-06ksmdb: 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>
2021-10-20ksmbd: 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: 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: 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>
2021-09-30ksmbd: 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>
2021-09-26ksmbd: 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>
2021-09-24ksmbd: 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>
2021-09-18ksmbd: add validation for FILE_FULL_EA_INFORMATION of smb2_get_infoNamjae Jeon
Add validation to check whether req->InputBufferLength is smaller than smb2_ea_info_req structure size. Cc: Ronnie Sahlberg <ronniesahlberg@gmail.com> Cc: Ralph Böhme <slow@samba.org> Cc: Steve French <smfrench@gmail.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-17ksmbd: prevent out of share accessHyunchul Lee
Because of .., files outside the share directory could be accessed. To prevent this, normalize the given path and remove all . and .. components. In addition to the usual large set of regression tests (smbtorture and xfstests), ran various tests on this to specifically check path name validation including libsmb2 tests to verify path normalization: ./examples/smb2-ls-async smb://172.30.1.15/homes2/../ ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/../ ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/../../ ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/../ ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/..bar/ ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/bar../ ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/bar.. ./examples/smb2-ls-async smb://172.30.1.15/homes2/foo/bar../../../../ 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>
2021-09-08ksmbd: fix read of uninitialized variable ret in set_file_basic_infoNamjae Jeon
Addresses-Coverity reported Uninitialized variables warninig : /fs/ksmbd/smb2pdu.c: 5525 in set_file_basic_info() 5519 if (!rc) { 5520 inode->i_ctime = ctime; 5521 mark_inode_dirty(inode); 5522 } 5523 inode_unlock(inode); 5524 } >>> CID 1506805: Uninitialized variables (UNINIT) >>> Using uninitialized value "rc". 5525 return rc; 5526 } 5527 5528 static int set_file_allocation_info(struct ksmbd_work *work, 5529 struct ksmbd_file *fp, char *buf) 5530 { Addresses-Coverity: ("Uninitialized variable") Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-03ksmbd: Reduce error log 'speed is unknown' to debugPer Forlin
This log happens on servers with a network bridge since the bridge does not have a specified link speed. This is not a real error so change the error log to debug instead. Signed-off-by: Per Forlin <perfn@axis.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-03ksmbd: remove setattr preparations in set_file_basic_info()Christian Brauner
Permission checking and copying over ownership information is the task of the underlying filesystem not ksmbd. The order is also wrong here. This modifies the inode before notify_change(). If notify_change() fails this will have changed ownership nonetheless. All of this is unnecessary though since the underlying filesystem's ->setattr handler will do all this (if required) by itself. Cc: Steve French <stfrench@microsoft.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: linux-cifs@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-03ksmbd: ensure error is surfaced in set_file_basic_info()Christian Brauner
It seems the error was accidently ignored until now. Make sure it is surfaced. Cc: Steve French <stfrench@microsoft.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: linux-cifs@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-03ksmbd: fix translation in ksmbd_acls_fattr()Christian Brauner
When creating new filesystem objects ksmbd translates between k*ids and s*ids. For this it often uses struct smb_fattr and stashes the k*ids in cf_uid and cf_gid. Let cf_uid and cf_gid always contain the final information taking any potential idmapped mounts into account. When finally translation cf_*id into s*ids translate them into the user namespace of ksmbd since that is the relevant user namespace here. Cc: Steve French <stfrench@microsoft.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: linux-cifs@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-03ksmbd: fix translation in smb2_populate_readdir_entry()Christian Brauner
When transferring ownership information to the client the k*ids are translated into raw *ids before they are sent over the wire. The function currently erroneously translates the k*ids according to the mount's idmapping. Instead, reporting the owning *ids to userspace the underlying k*ids need to be mapped up in the caller's user namespace. This is how stat() works. The caller in this instance is ksmbd itself and ksmbd always runs in the initial user namespace. Translate according to that. The idmapping of the mount is already taken into account by the lower filesystem and so kstat->*id will contain the mapped k*ids. Switch to from_k*id_munged() which ensures that the overflow*id is returned instead of the (*id_t)-1 when the k*id can't be translated. Cc: Steve French <stfrench@microsoft.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: linux-cifs@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-09-03ksmbd: fix lookup on idmapped mountsChristian Brauner
It's great that the new in-kernel ksmbd server will support idmapped mounts out of the box! However, lookup is currently broken. Lookup helpers such as lookup_one_len() call inode_permission() internally to ensure that the caller is privileged over the inode of the base dentry they are trying to lookup under. So the permission checking here is currently wrong. Linux v5.15 will gain a new lookup helper lookup_one() that does take idmappings into account. I've added it as part of my patch series to make btrfs support idmapped mounts. The new helper is in linux-next as part of David's (Sterba) btrfs for-next branch as commit c972214c133b ("namei: add mapping aware lookup helper"). I've said it before during one of my first reviews: I would very much recommend adding fstests to [1]. It already seems to have very rudimentary cifs support. There is a completely generic idmapped mount testsuite that supports idmapped mounts. [1]: https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git/ Cc: Colin Ian King <colin.king@canonical.com> Cc: Steve French <stfrench@microsoft.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Hyunchul Lee <hyc.lee@gmail.com> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: David Sterba <dsterba@suse.com> Cc: linux-cifs@vger.kernel.org Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-21ksmbd: fix permission check issue on chown and chmodNamjae Jeon
When commanding chmod and chown on cifs&ksmbd, ksmbd allows it without file permissions check. There is code to check it in settattr_prepare. Instead of setting the inode directly, update the mode and uid/gid through notify_change. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-13ksmbd: remove select FS_POSIX_ACL in KconfigNamjae Jeon
ksmbd is forcing to turn on FS_POSIX_ACL in Kconfig to use vfs acl functions(posix_acl_alloc, get_acl, set_posix_acl). OpenWRT and other platform doesn't use acl and this config is disable by default in kernel. This patch use IS_ENABLED() to know acl config is enable and use acl function if it is enable. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-13ksmbd: use proper errno instead of -1 in smb2_get_ksmbd_tcon()Namjae Jeon
Use proper errno instead of -1 in smb2_get_ksmbd_tcon(). Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-13ksmbd: update the comment for smb2_get_ksmbd_tcon()Namjae Jeon
Update the comment for smb2_get_ksmbd_tcon(). Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-13ksmbd: change int data type to booleanNamjae Jeon
Change data type of function that return only 0 or 1 to boolean. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-02ksmbd: fix an oops in error handling in smb2_open()Dan Carpenter
If smb2_get_name() then name is an error pointer. In the clean up code, we try to kfree() it and that will lead to an Oops. Set it to NULL instead. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-07-27ksmbd: add ipv6_addr_v4mapped check to know if connection from client is ipv4Namjae Jeon
ksmbd create socket with IPv6 to listen both IPv4 and IPv6 connection from client. Server should send IP addresses of NICs through network interface info response. If Client connection is IPv4, Server should fill IPv4 address in response buffer. But ss_family is always PF_INET6 on IPv6 socket. So This patch add ipv6_addr_v4mapped check to know client connection is IPv4. Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-10-19 12:30:41 +0000