From: Liu Bo <bo.li.liu@oracle.com>
Date: Fri, 18 Aug 2017 15:15:23 -0600
Subject: Btrfs: remove BUG_ON in __add_tree_block
Git-commit: cdccee993f2f3466f69a358daec19de744a02f92
Patch-mainline: v4.14-rc1
References: bsc#1149325
The BUG_ON() can be triggered when the caller is processing an invalid
extent inline ref, e.g.
a shared data ref is offered instead of an extent data ref, such that
it tries to find a non-existent tree block and then btrfs_search_slot
returns 1 for no such item.
This replaces the BUG_ON() with a WARN() followed by calling
btrfs_print_leaf() to show more details about what's going on and
returning -EINVAL to upper callers.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
---
fs/btrfs/relocation.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -32,6 +32,7 @@
#include "free-space-cache.h"
#include "inode-map.h"
#include "qgroup.h"
+#include "print-tree.h"
/*
* backref_node, mapping_node and tree_block start with this
@@ -3485,7 +3486,16 @@ again:
goto again;
}
}
- BUG_ON(ret);
+ if (ret) {
+ ASSERT(ret == 1);
+ btrfs_print_leaf(fs_info, path->nodes[0]);
+ btrfs_err(fs_info,
+ "tree block extent item (%llu) is not found in extent tree",
+ bytenr);
+ WARN_ON(1);
+ ret = -EINVAL;
+ goto out;
+ }
ret = add_tree_block(rc, &key, path, blocks);
out: