From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A20B31B21B4; Mon, 23 Dec 2024 16:13:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734970434; cv=none; b=I0dJp84guaaPlLasdCAyAmObd9LDTR5udWTMMGhRPPQrMGOVkmOhf+4EJyC5UqmjhVNQpCnDzgd2Jo/jlORLFmJXxPl0HYxTFGYdETXINU0+O+4hJ0Gj+Q6H48xWzqg0603qFo5EboYqEoNmFcNX39ktVMPwxkhz2GLcF+A1LFs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734970434; c=relaxed/simple; bh=oKM+WRZJSmeP3rPY8xckTEA8svq1Adzyx9+tVob43K0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hc086ewlP0elhxKuUdpgQEGs+HrV3g93ZPAbckWy7g8HM1K+hnPsFBavMktzWbAfdjCNoeejMo+NlJXjwN84zK7+WXolMJACiwwxABVn+Md3OpI0O3Nju/K4EKAzDuC584MQOywfe745Hmz61VZKJfA5Ja3Fpg2opHBXQaUB+vg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Vu55OAz6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Vu55OAz6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25A33C4CED3; Mon, 23 Dec 2024 16:13:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1734970434; bh=oKM+WRZJSmeP3rPY8xckTEA8svq1Adzyx9+tVob43K0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vu55OAz6RTuisK8g6/HaLSTFewD7bx4NOmrwHAJuXG7c5EBp1xt1dhT9KiIW+5mUs nRSNz2ELhmdI7xYs2dXKFJTV35A36FQIXvdkleAVb885KadNmvX2lIhXuRwVNkslJ3 OxHwB2h3FKNW3BuL6pUBfMml/E/6J2u+E4isPxAY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, James Bottomley , Ard Biesheuvel Subject: [PATCH 6.6 065/116] efivarfs: Fix error on non-existent file Date: Mon, 23 Dec 2024 16:58:55 +0100 Message-ID: <20241223155402.089551632@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241223155359.534468176@linuxfoundation.org> References: <20241223155359.534468176@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: James Bottomley commit 2ab0837cb91b7de507daa145d17b3b6b2efb3abf upstream. When looking up a non-existent file, efivarfs returns -EINVAL if the file does not conform to the NAME-GUID format and -ENOENT if it does. This is caused by efivars_d_hash() returning -EINVAL if the name is not formatted correctly. This error is returned before simple_lookup() returns a negative dentry, and is the error value that the user sees. Fix by removing this check. If the file does not exist, simple_lookup() will return a negative dentry leading to -ENOENT and efivarfs_create() already has a validity check before it creates an entry (and will correctly return -EINVAL) Signed-off-by: James Bottomley Cc: [ardb: make efivarfs_valid_name() static] Signed-off-by: Ard Biesheuvel Signed-off-by: Greg Kroah-Hartman --- fs/efivarfs/inode.c | 2 +- fs/efivarfs/internal.h | 1 - fs/efivarfs/super.c | 3 --- 3 files changed, 1 insertion(+), 5 deletions(-) --- a/fs/efivarfs/inode.c +++ b/fs/efivarfs/inode.c @@ -47,7 +47,7 @@ struct inode *efivarfs_get_inode(struct * * VariableName-12345678-1234-1234-1234-1234567891bc */ -bool efivarfs_valid_name(const char *str, int len) +static bool efivarfs_valid_name(const char *str, int len) { const char *s = str + len - EFI_VARIABLE_GUID_LEN; --- a/fs/efivarfs/internal.h +++ b/fs/efivarfs/internal.h @@ -50,7 +50,6 @@ bool efivar_variable_is_removable(efi_gu extern const struct file_operations efivarfs_file_operations; extern const struct inode_operations efivarfs_dir_inode_operations; -extern bool efivarfs_valid_name(const char *str, int len); extern struct inode *efivarfs_get_inode(struct super_block *sb, const struct inode *dir, int mode, dev_t dev, bool is_removable); --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -107,9 +107,6 @@ static int efivarfs_d_hash(const struct const unsigned char *s = qstr->name; unsigned int len = qstr->len; - if (!efivarfs_valid_name(s, len)) - return -EINVAL; - while (len-- > EFI_VARIABLE_GUID_LEN) hash = partial_name_hash(*s++, hash);