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btrfs-progs: check: orig: Don't panic when unexpected root item is referring to one extent 

With crafted image, expected root item can refer to certain extent, and
original mode uses BUG_ON() to handle such case.

Fix it by gracefully return error.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=200403
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Qu Wenruo 2018-07-05 15:45:56 +08:00 committed by David Sterba
parent beb3ede39a
commit c010437455
1 changed files with 6 additions and 1 deletions
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7
check/main.c
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@ -3724,7 +3724,12 @@ static int check_owner_ref(struct btrfs_root *root,
if (btrfs_header_owner(buf) == back->root)
return 0;
}
BUG_ON(rec->is_root);
/*
* Some unexpected root item referring to this one, return 1 to
* indicate owner not found
*/
if (rec->is_root)
return 1;
/* try to find the block by search corresponding fs tree */
key.objectid = btrfs_header_owner(buf);