DAOS-13604 dfuse: Fix resource leaks in readdir. (#12408)

Ensure that resources are properly freed if errors are encountered during
readdir.

Signed-off-by: Ashley Pittman <ashley.m.pittman@intel.com>

src/client/dfuse/ops/readdir.c

@@ -539,9 +539,9 @@ dfuse_do_readdir(struct dfuse_projection_info *fs_handle, fuse_req_t req, struct
  DFUSE_TRA_DEBUG(oh, "Switching to private handle");
  dfuse_dre_drop(fs_handle, oh);
  oh->doh_rd = _handle_init(oh->doh_ie->ie_dfs);
+ hdl = oh->doh_rd;
  if (oh->doh_rd == NULL)
  D_GOTO(out_reset, rc = ENOMEM);
- hdl = oh->doh_rd;
  DFUSE_TRA_UP(oh->doh_rd, oh, "readdir");
  } else {
  dfuse_readdir_reset(hdl);
@@ -647,9 +647,11 @@ dfuse_do_readdir(struct dfuse_projection_info *fs_handle, fuse_req_t req, struct
  NULL);
  if (rc == ENOENT) {
  DFUSE_TRA_DEBUG(oh, "File does not exist");
+ D_FREE(drc);
  continue;
  } else if (rc != 0) {
  DFUSE_TRA_DEBUG(oh, "Problem finding file %d", rc);
+ D_FREE(drc);
  D_GOTO(reply, rc);
  }
 
@@ -665,6 +667,8 @@ dfuse_do_readdir(struct dfuse_projection_info *fs_handle, fuse_req_t req, struct
  rc = create_entry(fs_handle, oh->doh_ie, &stbuf, obj, dre->dre_name,
  out, attr_len, &rlink);
  if (rc != 0) {
+ dfs_release(obj);
+ D_FREE(drc);
  D_GOTO(reply, rc);
  }
 
@@ -769,7 +773,8 @@ dfuse_do_readdir(struct dfuse_projection_info *fs_handle, fuse_req_t req, struct
  return 0;
 
 out_reset:
- dfuse_readdir_reset(hdl);
+ if (hdl)
+ dfuse_readdir_reset(hdl);
  D_ASSERT(rc != 0);
  return rc;
 }