diff options
| -rw-r--r-- | module/zfs/zfs_vnops.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/module/zfs/zfs_vnops.c b/module/zfs/zfs_vnops.c index a64e1e2dc..40d6c87a7 100644 --- a/module/zfs/zfs_vnops.c +++ b/module/zfs/zfs_vnops.c @@ -1206,6 +1206,19 @@ zfs_clone_range(znode_t *inzp, uint64_t *inoffp, znode_t *outzp, goto unlock; } + /* + * If we are copying only one block and it is smaller than recordsize + * property, do not allow destination to grow beyond one block if it + * is not there yet. Otherwise the destination will get stuck with + * that block size forever, that can be as small as 512 bytes, no + * matter how big the destination grow later. + */ + if (len <= inblksz && inblksz < outzfsvfs->z_max_blksz && + outzp->z_size <= inblksz && outoff + len > inblksz) { + error = SET_ERROR(EINVAL); + goto unlock; + } + error = zn_rlimit_fsize(outoff + len); if (error != 0) { goto unlock; |