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-rw-r--r--module/zfs/dmu.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/module/zfs/dmu.c b/module/zfs/dmu.c
index 7d3945433..eb3bc0ed2 100644
--- a/module/zfs/dmu.c
+++ b/module/zfs/dmu.c
@@ -644,9 +644,13 @@ static int
dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset,
uint64_t length)
{
- uint64_t object_size = (dn->dn_maxblkid + 1) * dn->dn_datablksz;
+ uint64_t object_size;
int err;
+ if (dn == NULL)
+ return (SET_ERROR(EINVAL));
+
+ object_size = (dn->dn_maxblkid + 1) * dn->dn_datablksz;
if (offset >= object_size)
return (0);