5780 Truncated coredumps

@@ -374,15 +374,32 @@
                  * case the path will remain an empty string.
                  */
                 (void) vnodetopath(vroot, fvp, fdinfo.pr_path,
                     sizeof (fdinfo.pr_path), credp);
 
-                error = VOP_GETATTR(fvp, &vattr, 0, credp, NULL);
-                if (error != 0) {
+                if (VOP_GETATTR(fvp, &vattr, 0, credp, NULL) != 0) {
+                        /*
+                         * Try to write at least a subset of information
+                         */
+                        fdinfo.pr_major = 0;
+                        fdinfo.pr_minor = 0;
+                        fdinfo.pr_ino = 0;
+                        fdinfo.pr_mode = 0;
+                        fdinfo.pr_uid = -1;
+                        fdinfo.pr_gid = -1;
+                        fdinfo.pr_rmajor = 0;
+                        fdinfo.pr_rminor = 0;
+                        fdinfo.pr_size = -1;
+
+                        error = elfnote(vp, &offset, NT_FDINFO,
+                                        sizeof (fdinfo), &fdinfo,
+                                        rlimit, credp);
                         VN_RELE(fvp);
                         VN_RELE(vroot);
+                        if (error)
                         goto done;
+                        continue;
                 }
 
                 if (fvp->v_type == VSOCK)
                         fdinfo.pr_fileflags |= sock_getfasync(fvp);