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Commit 1daf3540 authored by Daniel J Blueman's avatar Daniel J Blueman Committed by Chris Mason
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Btrfs: Prevent root_list corruption 



I was seeing root_list corruption on unmount during fs resize in 3.4-rc4; add
correct locking to address this.

Signed-off-by: default avatarDaniel J Blueman <daniel@quora.org>
Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 3e74317a

fs/btrfs/relocation.c

+2 −0
Original line number Diff line number Diff line
@@ -1279,7 +1279,9 @@ static int __update_reloc_root(struct btrfs_root *root, int del) 
		if (rb_node)

			backref_tree_panic(rb_node, -EEXIST, node->bytenr);

	} else {

		spin_lock(&root->fs_info->trans_lock);

		list_del_init(&root->root_list);

		spin_unlock(&root->fs_info->trans_lock);

		kfree(node);

	}

	return 0;