diff options
author | Namjae Jeon <linkinjeon@kernel.org> | 2022-09-22 17:08:49 +0300 |
---|---|---|
committer | Steve French <stfrench@microsoft.com> | 2022-10-05 09:15:44 +0300 |
commit | 5609bdd9ffdccd83f9003511b1801584b703baa5 (patch) | |
tree | aaa1b496f211921064c05736e88589de21e887e8 /fs | |
parent | b1c6b8403afb0e2083e3ed16694d5d5819400e4b (diff) | |
download | linux-5609bdd9ffdccd83f9003511b1801584b703baa5.tar.xz |
ksmbd: change security id to the one samba used for posix extension
Samba set SIDOWNER and SIDUNIX_GROUP in create posix context and
set SIDUNIX_USER/GROUP in other sids for posix extension.
This patch change security id to the one samba used.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/ksmbd/oplock.c | 17 | ||||
-rw-r--r-- | fs/ksmbd/smb2pdu.c | 9 | ||||
-rw-r--r-- | fs/ksmbd/smb2pdu.h | 6 |
3 files changed, 25 insertions, 7 deletions
diff --git a/fs/ksmbd/oplock.c b/fs/ksmbd/oplock.c index 2e56dac1fa6e..7c890daec2ba 100644 --- a/fs/ksmbd/oplock.c +++ b/fs/ksmbd/oplock.c @@ -1616,7 +1616,11 @@ void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp) memset(buf, 0, sizeof(struct create_posix_rsp)); buf->ccontext.DataOffset = cpu_to_le16(offsetof (struct create_posix_rsp, nlink)); - buf->ccontext.DataLength = cpu_to_le32(52); + /* + * DataLength = nlink(4) + reparse_tag(4) + mode(4) + + * domain sid(28) + unix group sid(16). + */ + buf->ccontext.DataLength = cpu_to_le32(56); buf->ccontext.NameOffset = cpu_to_le16(offsetof (struct create_posix_rsp, Name)); buf->ccontext.NameLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); @@ -1641,10 +1645,17 @@ void create_posix_rsp_buf(char *cc, struct ksmbd_file *fp) buf->nlink = cpu_to_le32(inode->i_nlink); buf->reparse_tag = cpu_to_le32(fp->volatile_id); buf->mode = cpu_to_le32(inode->i_mode); + /* + * SidBuffer(44) contain two sids(Domain sid(28), UNIX group sid(16)). + * Domain sid(28) = revision(1) + num_subauth(1) + authority(6) + + * sub_auth(4 * 4(num_subauth)) + RID(4). + * UNIX group id(16) = revision(1) + num_subauth(1) + authority(6) + + * sub_auth(4 * 1(num_subauth)) + RID(4). + */ id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), - SIDNFS_USER, (struct smb_sid *)&buf->SidBuffer[0]); + SIDOWNER, (struct smb_sid *)&buf->SidBuffer[0]); id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), - SIDNFS_GROUP, (struct smb_sid *)&buf->SidBuffer[20]); + SIDUNIX_GROUP, (struct smb_sid *)&buf->SidBuffer[28]); } /* diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c index f33a04e9e458..bb19c9d1de78 100644 --- a/fs/ksmbd/smb2pdu.c +++ b/fs/ksmbd/smb2pdu.c @@ -3572,10 +3572,15 @@ static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; if (d_info->hide_dot_file && d_info->name[0] == '.') posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; + /* + * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). + * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + + * sub_auth(4 * 1(num_subauth)) + RID(4). + */ id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), - SIDNFS_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); + SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), - SIDNFS_GROUP, (struct smb_sid *)&posix_info->SidBuffer[20]); + SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); memcpy(posix_info->name, conv_name, conv_len); posix_info->name_len = cpu_to_le32(conv_len); posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); diff --git a/fs/ksmbd/smb2pdu.h b/fs/ksmbd/smb2pdu.h index af455278d005..2eb6b819c89d 100644 --- a/fs/ksmbd/smb2pdu.h +++ b/fs/ksmbd/smb2pdu.h @@ -158,7 +158,8 @@ struct create_posix_rsp { __le32 nlink; __le32 reparse_tag; __le32 mode; - u8 SidBuffer[40]; + /* SidBuffer contain two sids(Domain sid(28), UNIX group sid(16)) */ + u8 SidBuffer[44]; } __packed; struct smb2_buffer_desc_v1 { @@ -439,7 +440,8 @@ struct smb2_posix_info { __le32 HardLinks; __le32 ReparseTag; __le32 Mode; - u8 SidBuffer[40]; + /* SidBuffer contain two sids (UNIX user sid(16), UNIX group sid(16)) */ + u8 SidBuffer[32]; __le32 name_len; u8 name[1]; /* |