From nobody Tue Nov 26 03:58:53 2024 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 675F338DF9; Tue, 22 Oct 2024 09:35:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.255 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729589717; cv=none; b=feJzNVxn4HtvM9Rf8c80CzFduAG3W6Nelfra2pALQEDt/MKOXlS7/etuIidmeC3JyUXj/kBAe6d53UCsHemAYpooi87vd9jEGL40kopuHdW108twgSz7ED3OQwHfKTCaSI8JjR4ELJTdRzdQToAhZ6jx9s8g8UbVQUBFnTx9Gu0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729589717; c=relaxed/simple; bh=Rp2YAPmT6eb5+b/9irGQcM/XdUNlyVMMg51kRmiKBqs=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Q6mAjqQ5Idtzb4/Z5FdwTpbhqT9GS4zBFPluzmdUkbVwDV+i79T+h680ykwtW9qUk+2OMk2Hx25FdSKNbiIQcgcN7FYvmHWJopwEGyNY9EzwK4RHEw1bbFYD3C555z5IFXUIA3z9KuhBjT7cwbM0h9/F9nl6ovR6phiQ0vRFGuE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.255 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.174]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4XXn6J41w6z1T8mM; Tue, 22 Oct 2024 17:33:12 +0800 (CST) Received: from dggpemf500002.china.huawei.com (unknown [7.185.36.57]) by mail.maildlp.com (Postfix) with ESMTPS id D4C5C1402CA; Tue, 22 Oct 2024 17:35:12 +0800 (CST) Received: from huawei.com (10.175.101.6) by dggpemf500002.china.huawei.com (7.185.36.57) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 22 Oct 2024 17:35:12 +0800 From: Yue Haibing To: , , , , , CC: , , Subject: [PATCH v2] btrfs: Fix passing 0 to ERR_PTR in btrfs_search_dir_index_item() Date: Tue, 22 Oct 2024 17:52:08 +0800 Message-ID: <20241022095208.1369473-1-yuehaibing@huawei.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemf500002.china.huawei.com (7.185.36.57) Content-Type: text/plain; charset="utf-8" ret may be zero in btrfs_search_dir_index_item() and should not passed to ERR_PTR(). Now btrfs_unlink_subvol() is the only caller to this, reconstructed it to check ERR_PTR(-ENOENT) while ret >=3D 0, this fix smatch warnings: fs/btrfs/dir-item.c:353 btrfs_search_dir_index_item() warn: passing zero to 'ERR_PTR' Fixes: 9dcbe16fccbb ("btrfs: use btrfs_for_each_slot in btrfs_search_dir_in= dex_item") Signed-off-by: Yue Haibing Reviewed-by: David Sterba Reviewed-by: Johannes Thumshirn --- v2: return ERR_PTR(-ENOENT) while ret >=3D 0 --- fs/btrfs/dir-item.c | 4 ++-- fs/btrfs/inode.c | 7 ++----- 2 files changed, 4 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c index d3093eba54a5..1ea5d8fcfbf7 100644 --- a/fs/btrfs/dir-item.c +++ b/fs/btrfs/dir-item.c @@ -345,8 +345,8 @@ btrfs_search_dir_index_item(struct btrfs_root *root, st= ruct btrfs_path *path, return di; } /* Adjust return code if the key was not found in the next leaf. */ - if (ret > 0) - ret =3D 0; + if (ret >=3D 0) + ret =3D -ENOENT; =20 return ERR_PTR(ret); } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index acb206d5da3b..7569c8b27f9f 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4373,11 +4373,8 @@ static int btrfs_unlink_subvol(struct btrfs_trans_ha= ndle *trans, */ if (btrfs_ino(inode) =3D=3D BTRFS_EMPTY_SUBVOL_DIR_OBJECTID) { di =3D btrfs_search_dir_index_item(root, path, dir_ino, &fname.disk_name= ); - if (IS_ERR_OR_NULL(di)) { - if (!di) - ret =3D -ENOENT; - else - ret =3D PTR_ERR(di); + if (IS_ERR(di)) { + ret =3D PTR_ERR(di); btrfs_abort_transaction(trans, ret); goto out; } --=20 2.34.1