Btrfs: return error if the range we want to map is bogus

Currently if we have corrupt metadata map_extent_buffer will complain about it,
but not return an error so the caller has no idea a problem was hit.  Fix this.
Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 714adc4..1bbd26b 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3690,6 +3690,7 @@ int map_private_extent_buffer(struct extent_buffer *eb, unsigned long start,
                       "wanted %lu %lu\n", (unsigned long long)eb->start,
                       eb->len, start, min_len);
                WARN_ON(1);
+               return -EINVAL;
        }
 
        p = extent_buffer_page(eb, i);