From: Omar Sandoval <osan...@fb.com>

btrfs_free_extent() can fail because of ENOMEM. There's no reason to
panic here, we can just abort the transaction.

Fixes: f4b9aa8d3b87 ("btrfs_truncate")
Reviewed-by: Nikolay Borisov <nbori...@suse.com>
Signed-off-by: Omar Sandoval <osan...@fb.com>
---
 fs/btrfs/inode.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 79d1da01a90d..bd4975476f0e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4655,7 +4655,10 @@ int btrfs_truncate_inode_items(struct btrfs_trans_handle 
*trans,
                                                extent_num_bytes, 0,
                                                btrfs_header_owner(leaf),
                                                ino, extent_offset);
-                       BUG_ON(ret);
+                       if (ret) {
+                               btrfs_abort_transaction(trans, ret);
+                               break;
+                       }
                        if (btrfs_should_throttle_delayed_refs(trans, fs_info))
                                btrfs_async_run_delayed_refs(fs_info,
                                        trans->delayed_ref_updates * 2,
-- 
2.17.0

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