Now that we have a helper to report invalid value of extent inline ref
type, we need to quit gracefully instead of throwing out a kernel panic.

Signed-off-by: Liu Bo <bo.li....@oracle.com>
---
 fs/btrfs/relocation.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index f0bef3c..4806e78 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -3774,7 +3774,10 @@ int add_data_references(struct reloc_control *rc,
                        ret = find_data_references(rc, extent_key,
                                                   eb, dref, blocks);
                } else {
-                       BUG();
+                       ret = -EINVAL;
+                       WARN(1,
+                    "extent %llu slot %d has an invalid inline ref type\n",
+                            eb->start, path->slots[0]);
                }
                if (ret) {
                        err = ret;
-- 
2.9.4

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