From c578f007ff9d8ee3d5070960f787fa48d46b7c3c Mon Sep 17 00:00:00 2001
From: Simon Klinkert <klinkert@webgods.de>
Date: Fri, 22 Jun 2012 10:17:50 -0400
Subject: [PATCH] Illumos #2901: zfs receive fails for exabyte sparse files

Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

References:
  https://www.illumos.org/issues/2901

Ported by: Martin Matuska <martin@matuska.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
---
 module/zfs/dmu_send.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/module/zfs/dmu_send.c b/module/zfs/dmu_send.c
index 2f0613211..9f9003744 100644
--- a/module/zfs/dmu_send.c
+++ b/module/zfs/dmu_send.c
@@ -95,6 +95,9 @@ dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
 {
 	struct drr_free *drrf = &(ba->drr->drr_u.drr_free);
 
+	if (length != -1ULL && offset + length < offset)
+		length = -1ULL;
+
 	/*
 	 * If there is a pending op, but it's not PENDING_FREE, push it out,
 	 * since free block aggregation can only be done for blocks of the