From: Christophe de Dinechin <dinechin@redhat.com>
Date: Fri, 28 Apr 2017 09:51:21 +0000 (+0200)
Subject: btrfs-progs: check: make max_size consistent with nr
X-Git-Tag: upstream/4.16.1~658
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=091a1138bd64a789e76e3e5b6ff65cce2cfc599c;p=platform%2Fupstream%2Fbtrfs-progs.git

btrfs-progs: check: make max_size consistent with nr

Since we memset tmpl, max_size==0. This does not seem consistent with nr = 1.
In check_extent_refs, we will call:

  set_extent_dirty(root->fs_info->excluded_extents,
                   rec->start,
                   rec->start + rec->max_size - 1);

This ends up with BUG_ON(end < start) in insert_state.

Signed-off-by: Christophe de Dinechin <dinechin@redhat.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/cmds-check.c b/cmds-check.c
index 571bd4e..afa7823 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -6194,6 +6194,7 @@ static int add_tree_backref(struct cache_tree *extent_cache, u64 bytenr,
 		tmpl.start = bytenr;
 		tmpl.nr = 1;
 		tmpl.metadata = 1;
+		tmpl.max_size = 1;
 
 		ret = add_extent_rec_nolookup(extent_cache, &tmpl);
 		if (ret)