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Commit 573a0755 authored by Josef Bacik's avatar Josef Bacik Committed by Chris Mason
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Btrfs: check for an extent_op on the locked ref 



We could have possibly added an extent_op to the locked_ref while we dropped
locked_ref->lock, so check for this case as well and loop around.  Otherwise we
could lose flag updates which would lead to extent tree corruption.  Thanks,

cc: stable@vger.kernel.org
Signed-off-by: default avatarJosef Bacik <jbacik@fb.com>
Signed-off-by: default avatarChris Mason <clm@fb.com>
parent ba8b0289

fs/btrfs/extent-tree.c

+2 −1
Original line number Original line Diff line number Diff line
@@ -2444,7 +2444,8 @@ static noinline int __btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 
			spin_unlock(&locked_ref->lock);

			spin_unlock(&locked_ref->lock);

			spin_lock(&delayed_refs->lock);

			spin_lock(&delayed_refs->lock);

			spin_lock(&locked_ref->lock);

			spin_lock(&locked_ref->lock);

			if (rb_first(&locked_ref->ref_root)) {

			if (rb_first(&locked_ref->ref_root) ||

			    locked_ref->extent_op) {

				spin_unlock(&locked_ref->lock);

				spin_unlock(&locked_ref->lock);

				spin_unlock(&delayed_refs->lock);

				spin_unlock(&delayed_refs->lock);

				continue;

				continue;