source3/smbd/smb2_ioctl_smbtorture.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2021
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../libcli/smb/smb_common.h"
  26 #include "../lib/util/tevent_ntstatus.h"
  27 #include "include/ntioctl.h"
  28 #include "smb2_ioctl_private.h"
  29 #include "librpc/gen_ndr/ioctl.h"
  30
  31 #undef DBGC_CLASS
  32 #define DBGC_CLASS DBGC_SMB2
  33
  34 struct async_sleep_state {
  35         struct smbd_server_connection *sconn;
  36         files_struct *fsp;
  37 };
  38
  39 static void smbd_fsctl_torture_async_sleep_done(struct tevent_req *subreq);
  40
  41 static struct tevent_req *smbd_fsctl_torture_async_sleep_send(
  42                                 TALLOC_CTX *mem_ctx,
  43                                 struct tevent_context *ev,
  44                                 files_struct *fsp,
  45                                 uint8_t msecs)
  46 {
  47         struct async_sleep_state *state = NULL;
  48         struct tevent_req *subreq = NULL;
  49         bool ok;
  50
  51         subreq = tevent_req_create(mem_ctx,
  52                                 &state,
  53                                 struct async_sleep_state);
  54         if (!subreq) {
  55                 return NULL;
  56         }
  57
  58         /*
  59          * Store the conn separately, as the test is to
  60          * see if fsp is still a valid pointer, so we can't
  61          * do anything other than test it for entry in the
  62          * open files on this server connection.
  63          */
  64         state->sconn = fsp->conn->sconn;
  65         state->fsp = fsp;
  66
  67         /*
  68          * Just wait for the specified number of micro seconds,
  69          * to allow the client time to close fsp.
  70          */
  71         ok = tevent_req_set_endtime(subreq,
  72                                     ev,
  73                                     timeval_current_ofs(0, msecs));
  74         if (!ok) {
  75                 tevent_req_nterror(subreq, NT_STATUS_NO_MEMORY);
  76                 return tevent_req_post(subreq, ev);
  77         }
  78
  79         return subreq;
  80 }
  81
  82 static files_struct *find_my_fsp(struct files_struct *fsp,
  83                                  void *private_data)
  84 {
  85         struct files_struct *myfsp = (struct files_struct *)private_data;
  86
  87         if (fsp == myfsp) {
  88                 return myfsp;
  89         }
  90         return NULL;
  91 }
  92
  93 static bool smbd_fsctl_torture_async_sleep_recv(struct tevent_req *subreq)
  94 {
  95         tevent_req_received(subreq);
  96         return true;
  97 }
  98
  99 static void smbd_fsctl_torture_async_sleep_done(struct tevent_req *subreq)
 100 {
 101         struct files_struct *found_fsp;
 102         struct tevent_req *req = tevent_req_callback_data(
 103                                         subreq,
 104                                         struct tevent_req);
 105         struct async_sleep_state *state = tevent_req_data(
 106                                         subreq,
 107                                         struct async_sleep_state);
 108
 109         /* Does state->fsp still exist on state->sconn ? */
 110         found_fsp = files_forall(state->sconn,
 111                                  find_my_fsp,
 112                                  state->fsp);
 113
 114         smbd_fsctl_torture_async_sleep_recv(subreq);
 115         TALLOC_FREE(subreq);
 116
 117         if (found_fsp == NULL) {
 118                 /*
 119                  * We didn't find it - return an error to the
 120                  * smb2 ioctl request. Use NT_STATUS_FILE_CLOSED so
 121                  * the client can tell the difference between
 122                  * a bad fsp handle and
 123                  *
 124                  * BUG: https://bugzilla.samba.org/show_bug.cgi?id=14769
 125                  *
 126                  * This request should block file closure until it
 127                  * has completed.
 128                  */
 129                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 130                 return;
 131         }
 132         tevent_req_done(req);
 133 }
 134
 135 struct tevent_req *smb2_ioctl_smbtorture(uint32_t ctl_code,
 136                                          struct tevent_context *ev,
 137                                          struct tevent_req *req,
 138                                          struct smbd_smb2_ioctl_state *state)
 139 {
 140         NTSTATUS status;
 141         bool ok;
 142
 143         ok = lp_parm_bool(-1, "smbd", "FSCTL_SMBTORTURE", false);
 144         if (!ok) {
 145                 goto not_supported;
 146         }
 147
 148         switch (ctl_code) {
 149         case FSCTL_SMBTORTURE_FORCE_UNACKED_TIMEOUT:
 150                 if (state->in_input.length != 0) {
 151                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 152                         return tevent_req_post(req, ev);
 153                 }
 154
 155                 state->smb2req->xconn->ack.force_unacked_timeout = true;
 156                 tevent_req_done(req);
 157                 return tevent_req_post(req, ev);
 158
 159         case FSCTL_SMBTORTURE_IOCTL_RESPONSE_BODY_PADDING8:
 160                 if (state->in_input.length != 0) {
 161                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 162                         return tevent_req_post(req, ev);
 163                 }
 164
 165                 if (state->in_max_output > 0) {
 166                         uint32_t size = state->in_max_output;
 167
 168                         state->out_output = data_blob_talloc(state, NULL, size);
 169                         if (tevent_req_nomem(state->out_output.data, req)) {
 170                                 return tevent_req_post(req, ev);
 171                         }
 172                         memset(state->out_output.data, 8, size);
 173                 }
 174
 175                 state->body_padding = 8;
 176                 tevent_req_done(req);
 177                 return tevent_req_post(req, ev);
 178
 179         case FSCTL_SMBTORTURE_GLOBAL_READ_RESPONSE_BODY_PADDING8:
 180                 if (state->in_input.length != 0) {
 181                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 182                         return tevent_req_post(req, ev);
 183                 }
 184
 185                 state->smb2req->xconn->smb2.smbtorture.read_body_padding = 8;
 186                 tevent_req_done(req);
 187                 return tevent_req_post(req, ev);
 188
 189         case FSCTL_SMBTORTURE_FSP_ASYNC_SLEEP: {
 190                 struct tevent_req *subreq = NULL;
 191
 192                 /* Data is 1 byte of CVAL stored seconds to delay for. */
 193                 if (state->in_input.length != 1) {
 194                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 195                         return tevent_req_post(req, ev);
 196                 }
 197                 if (state->fsp == NULL) {
 198                         tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
 199                         return tevent_req_post(req, ev);
 200                 }
 201
 202                 subreq = smbd_fsctl_torture_async_sleep_send(
 203                                                 req,
 204                                                 ev,
 205                                                 state->fsp,
 206                                                 CVAL(state->in_input.data,0));
 207                 if (subreq == NULL) {
 208                         tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 209                         return tevent_req_post(req, ev);
 210                 }
 211                 tevent_req_set_callback(subreq,
 212                                         smbd_fsctl_torture_async_sleep_done,
 213                                         req);
 214                 return req;
 215         }
 216
 217         default:
 218                 goto not_supported;
 219         }
 220
 221 not_supported:
 222         if (IS_IPC(state->smbreq->conn)) {
 223                 status = NT_STATUS_FS_DRIVER_REQUIRED;
 224         } else {
 225                 status = NT_STATUS_INVALID_DEVICE_REQUEST;
 226         }
 227
 228         tevent_req_nterror(req, status);
 229         return tevent_req_post(req, ev);
 230 }