From dc72c60ec11ec48a3c325bd4249afbf3ba1876c7 Mon Sep 17 00:00:00 2001
From: Paul Dagnelie <paul.dagnelie@delphix.com>
Date: Thu, 16 Feb 2023 09:23:39 -0800
Subject: [PATCH] zfs redact fails when dnodesize=auto

Add handling to dmu_object_next for the case where *objectp == 0.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Paul Dagnelie <pcd@delphix.com>
Closes #14479
---
 module/zfs/dmu_object.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/module/zfs/dmu_object.c b/module/zfs/dmu_object.c
index 6fe4480d6..d0e39a423 100644
--- a/module/zfs/dmu_object.c
+++ b/module/zfs/dmu_object.c
@@ -409,6 +409,8 @@ dmu_object_next(objset_t *os, uint64_t *objectp, boolean_t hole, uint64_t txg)
 		 * hand off to dnode_next_offset() for further scanning.
 		 */
 		while (i <= last_obj) {
+			if (i == 0)
+				return (SET_ERROR(ESRCH));
 			error = dmu_object_info(os, i, &doi);
 			if (error == ENOENT) {
 				if (hole) {