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-rw-r--r--source3/smbd/posix_acls.c89
1 files changed, 86 insertions, 3 deletions
diff --git a/source3/smbd/posix_acls.c b/source3/smbd/posix_acls.c
index 503727fb99..1f3874cad6 100644
--- a/source3/smbd/posix_acls.c
+++ b/source3/smbd/posix_acls.c
@@ -1342,6 +1342,89 @@ static bool uid_entry_in_group(connection_struct *conn, canon_ace *uid_ace, cano
}
/****************************************************************************
+ A well formed POSIX file or default ACL has at least 3 entries, a
+ SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
+ In addition, the owner must always have at least read access.
+ When using this call on get_acl, the pst struct is valid and contains
+ the mode of the file.
+****************************************************************************/
+
+static bool ensure_canon_entry_valid_on_get(connection_struct *conn,
+ canon_ace **pp_ace,
+ const struct dom_sid *pfile_owner_sid,
+ const struct dom_sid *pfile_grp_sid,
+ const SMB_STRUCT_STAT *pst)
+{
+ canon_ace *pace;
+ bool got_user = false;
+ bool got_group = false;
+ bool got_other = false;
+
+ for (pace = *pp_ace; pace; pace = pace->next) {
+ if (pace->type == SMB_ACL_USER_OBJ) {
+ got_user = true;
+ } else if (pace->type == SMB_ACL_GROUP_OBJ) {
+ got_group = true;
+ } else if (pace->type == SMB_ACL_OTHER) {
+ got_other = true;
+ }
+ }
+
+ if (!got_user) {
+ if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
+ DEBUG(0,("malloc fail.\n"));
+ return false;
+ }
+
+ ZERO_STRUCTP(pace);
+ pace->type = SMB_ACL_USER_OBJ;
+ pace->owner_type = UID_ACE;
+ pace->unix_ug.type = ID_TYPE_UID;
+ pace->unix_ug.id = pst->st_ex_uid;
+ pace->trustee = *pfile_owner_sid;
+ pace->attr = ALLOW_ACE;
+ pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRUSR, S_IWUSR, S_IXUSR);
+ DLIST_ADD(*pp_ace, pace);
+ }
+
+ if (!got_group) {
+ if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
+ DEBUG(0,("malloc fail.\n"));
+ return false;
+ }
+
+ ZERO_STRUCTP(pace);
+ pace->type = SMB_ACL_GROUP_OBJ;
+ pace->owner_type = GID_ACE;
+ pace->unix_ug.type = ID_TYPE_GID;
+ pace->unix_ug.id = pst->st_ex_gid;
+ pace->trustee = *pfile_grp_sid;
+ pace->attr = ALLOW_ACE;
+ pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IRGRP, S_IWGRP, S_IXGRP);
+ DLIST_ADD(*pp_ace, pace);
+ }
+
+ if (!got_other) {
+ if ((pace = talloc(talloc_tos(), canon_ace)) == NULL) {
+ DEBUG(0,("malloc fail.\n"));
+ return false;
+ }
+
+ ZERO_STRUCTP(pace);
+ pace->type = SMB_ACL_OTHER;
+ pace->owner_type = WORLD_ACE;
+ pace->unix_ug.type = ID_TYPE_NOT_SPECIFIED;
+ pace->unix_ug.id = -1;
+ pace->trustee = global_sid_World;
+ pace->attr = ALLOW_ACE;
+ pace->perms = unix_perms_to_acl_perms(pst->st_ex_mode, S_IROTH, S_IWOTH, S_IXOTH);
+ DLIST_ADD(*pp_ace, pace);
+ }
+
+ return true;
+}
+
+/****************************************************************************
A well formed POSIX file or default ACL has at least 3 entries, a
SMB_ACL_USER_OBJ, SMB_ACL_GROUP_OBJ, SMB_ACL_OTHER_OBJ.
In addition, the owner must always have at least read access.
@@ -2749,9 +2832,9 @@ static canon_ace *canonicalise_acl(struct connection_struct *conn,
* This next call will ensure we have at least a user/group/world set.
*/
- if (!ensure_canon_entry_valid(conn, &l_head, is_default_acl, conn->params,
- S_ISDIR(psbuf->st_ex_mode), powner, pgroup,
- psbuf, False))
+ if (!ensure_canon_entry_valid_on_get(conn, &l_head,
+ powner, pgroup,
+ psbuf))
goto fail;
/*