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btrfs: hold a root ref in btrfs_get_dentry
Looking up the inode we need to search the root, make sure we hold a reference on that root while we're doing the lookup. Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -82,12 +82,17 @@ static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
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err = PTR_ERR(root);
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goto fail;
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}
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if (!btrfs_grab_fs_root(root)) {
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err = -ENOENT;
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goto fail;
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}
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key.objectid = objectid;
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key.type = BTRFS_INODE_ITEM_KEY;
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key.offset = 0;
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inode = btrfs_iget(sb, &key, root);
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btrfs_put_fs_root(root);
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if (IS_ERR(inode)) {
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err = PTR_ERR(inode);
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goto fail;
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