License cleanup: add SPDX GPL-2.0 license identifier to files with no license
Many source files in the tree are missing licensing information, which
makes it harder for compliance tools to determine the correct license.
By default all files without license information are under the default
license of the kernel, which is GPL version 2.
Update the files which contain no license information with the 'GPL-2.0'
SPDX license identifier. The SPDX identifier is a legally binding
shorthand, which can be used instead of the full boiler plate text.
This patch is based on work done by Thomas Gleixner and Kate Stewart and
Philippe Ombredanne.
How this work was done:
Patches were generated and checked against linux-4.14-rc6 for a subset of
the use cases:
- file had no licensing information it it.
- file was a */uapi/* one with no licensing information in it,
- file was a */uapi/* one with existing licensing information,
Further patches will be generated in subsequent months to fix up cases
where non-standard license headers were used, and references to license
had to be inferred by heuristics based on keywords.
The analysis to determine which SPDX License Identifier to be applied to
a file was done in a spreadsheet of side by side results from of the
output of two independent scanners (ScanCode & Windriver) producing SPDX
tag:value files created by Philippe Ombredanne. Philippe prepared the
base worksheet, and did an initial spot review of a few 1000 files.
The 4.13 kernel was the starting point of the analysis with 60,537 files
assessed. Kate Stewart did a file by file comparison of the scanner
results in the spreadsheet to determine which SPDX license identifier(s)
to be applied to the file. She confirmed any determination that was not
immediately clear with lawyers working with the Linux Foundation.
Criteria used to select files for SPDX license identifier tagging was:
- Files considered eligible had to be source code files.
- Make and config files were included as candidates if they contained >5
lines of source
- File already had some variant of a license header in it (even if <5
lines).
All documentation files were explicitly excluded.
The following heuristics were used to determine which SPDX license
identifiers to apply.
- when both scanners couldn't find any license traces, file was
considered to have no license information in it, and the top level
COPYING file license applied.
For non */uapi/* files that summary was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 11139
and resulted in the first patch in this series.
If that file was a */uapi/* path one, it was "GPL-2.0 WITH
Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was:
SPDX license identifier # files
---------------------------------------------------|-------
GPL-2.0 WITH Linux-syscall-note 930
and resulted in the second patch in this series.
- if a file had some form of licensing information in it, and was one
of the */uapi/* ones, it was denoted with the Linux-syscall-note if
any GPL family license was found in the file or had no licensing in
it (per prior point). Results summary:
SPDX license identifier # files
---------------------------------------------------|------
GPL-2.0 WITH Linux-syscall-note 270
GPL-2.0+ WITH Linux-syscall-note 169
((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21
((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17
LGPL-2.1+ WITH Linux-syscall-note 15
GPL-1.0+ WITH Linux-syscall-note 14
((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5
LGPL-2.0+ WITH Linux-syscall-note 4
LGPL-2.1 WITH Linux-syscall-note 3
((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3
((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1
and that resulted in the third patch in this series.
- when the two scanners agreed on the detected license(s), that became
the concluded license(s).
- when there was disagreement between the two scanners (one detected a
license but the other didn't, or they both detected different
licenses) a manual inspection of the file occurred.
- In most cases a manual inspection of the information in the file
resulted in a clear resolution of the license that should apply (and
which scanner probably needed to revisit its heuristics).
- When it was not immediately clear, the license identifier was
confirmed with lawyers working with the Linux Foundation.
- If there was any question as to the appropriate license identifier,
the file was flagged for further research and to be revisited later
in time.
In total, over 70 hours of logged manual review was done on the
spreadsheet to determine the SPDX license identifiers to apply to the
source files by Kate, Philippe, Thomas and, in some cases, confirmation
by lawyers working with the Linux Foundation.
Kate also obtained a third independent scan of the 4.13 code base from
FOSSology, and compared selected files where the other two scanners
disagreed against that SPDX file, to see if there was new insights. The
Windriver scanner is based on an older version of FOSSology in part, so
they are related.
Thomas did random spot checks in about 500 files from the spreadsheets
for the uapi headers and agreed with SPDX license identifier in the
files he inspected. For the non-uapi files Thomas did random spot checks
in about 15000 files.
In initial set of patches against 4.14-rc6, 3 files were found to have
copy/paste license identifier errors, and have been fixed to reflect the
correct identifier.
Additionally Philippe spent 10 hours this week doing a detailed manual
inspection and review of the 12,461 patched files from the initial patch
version early this week with:
- a full scancode scan run, collecting the matched texts, detected
license ids and scores
- reviewing anything where there was a license detected (about 500+
files) to ensure that the applied SPDX license was correct
- reviewing anything where there was no detection but the patch license
was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied
SPDX license was correct
This produced a worksheet with 20 files needing minor correction. This
worksheet was then exported into 3 different .csv files for the
different types of files to be modified.
These .csv files were then reviewed by Greg. Thomas wrote a script to
parse the csv files and add the proper SPDX tag to the file, in the
format that the file expected. This script was further refined by Greg
based on the output to detect more types of files automatically and to
distinguish between header and source .c files (which need different
comment types.) Finally Greg ran the script using the .csv files to
generate the patches.
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-11-01 17:07:57 +03:00
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/* SPDX-License-Identifier: GPL-2.0 */
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2011-03-09 22:38:26 +03:00
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/*
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* evm.h
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*
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* Copyright (c) 2009 IBM Corporation
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* Author: Mimi Zohar <zohar@us.ibm.com>
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*/
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#ifndef _LINUX_EVM_H
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#define _LINUX_EVM_H
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#include <linux/integrity.h>
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2011-03-09 22:40:44 +03:00
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#include <linux/xattr.h>
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2011-03-09 22:38:26 +03:00
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2011-05-06 12:34:13 +04:00
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struct integrity_iint_cache;
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2011-03-09 22:38:26 +03:00
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#ifdef CONFIG_EVM
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2015-10-22 21:26:32 +03:00
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extern int evm_set_key(void *key, size_t keylen);
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2011-03-09 22:38:26 +03:00
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extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
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const char *xattr_name,
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void *xattr_value,
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2011-05-06 12:34:13 +04:00
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size_t xattr_value_len,
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struct integrity_iint_cache *iint);
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2011-05-13 20:53:38 +04:00
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extern int evm_inode_setattr(struct dentry *dentry, struct iattr *attr);
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2011-03-09 22:39:57 +03:00
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extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
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2021-05-14 18:27:48 +03:00
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extern int evm_inode_setxattr(struct user_namespace *mnt_userns,
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struct dentry *dentry, const char *name,
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2011-03-09 22:38:26 +03:00
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const void *value, size_t size);
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extern void evm_inode_post_setxattr(struct dentry *dentry,
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const char *xattr_name,
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const void *xattr_value,
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size_t xattr_value_len);
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2021-05-14 18:27:48 +03:00
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extern int evm_inode_removexattr(struct user_namespace *mnt_userns,
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struct dentry *dentry, const char *xattr_name);
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2011-03-09 22:39:18 +03:00
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extern void evm_inode_post_removexattr(struct dentry *dentry,
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const char *xattr_name);
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2011-03-09 22:40:44 +03:00
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extern int evm_inode_init_security(struct inode *inode,
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const struct xattr *xattr_array,
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struct xattr *evm);
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2021-05-14 18:27:45 +03:00
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extern bool evm_revalidate_status(const char *xattr_name);
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evm: Verify portable signatures against all protected xattrs
Currently, the evm_config_default_xattrnames array contains xattr names
only related to LSMs which are enabled in the kernel configuration.
However, EVM portable signatures do not depend on local information and a
vendor might include in the signature calculation xattrs that are not
enabled in the target platform.
Just including all xattrs names in evm_config_default_xattrnames is not a
safe approach, because a target system might have already calculated
signatures or HMACs based only on the enabled xattrs. After applying this
patch, EVM would verify those signatures and HMACs with all xattrs instead.
The non-enabled ones, which could possibly exist, would cause a
verification error.
Thus, this patch adds a new field named enabled to the xattr_list
structure, which is set to true if the LSM associated to a given xattr name
is enabled in the kernel configuration. The non-enabled xattrs are taken
into account only in evm_calc_hmac_or_hash(), if the passed security.evm
type is EVM_XATTR_PORTABLE_DIGSIG.
The new function evm_protected_xattr_if_enabled() has been defined so that
IMA can include all protected xattrs and not only the enabled ones in the
measurement list, if the new template fields xattrnames, xattrlengths or
xattrvalues have been included in the template format.
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
2021-05-28 10:38:09 +03:00
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extern int evm_protected_xattr_if_enabled(const char *req_xattr_name);
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2021-06-01 11:23:38 +03:00
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extern int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
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int buffer_size, char type,
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bool canonical_fmt);
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2011-08-19 02:07:44 +04:00
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#ifdef CONFIG_FS_POSIX_ACL
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extern int posix_xattr_acl(const char *xattrname);
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#else
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static inline int posix_xattr_acl(const char *xattrname)
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{
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return 0;
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}
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#endif
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2011-03-09 22:38:26 +03:00
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#else
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2015-10-22 21:26:32 +03:00
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static inline int evm_set_key(void *key, size_t keylen)
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{
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return -EOPNOTSUPP;
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}
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2011-03-09 22:38:26 +03:00
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#ifdef CONFIG_INTEGRITY
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static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
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const char *xattr_name,
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void *xattr_value,
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2011-05-06 12:34:13 +04:00
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size_t xattr_value_len,
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struct integrity_iint_cache *iint)
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2011-03-09 22:38:26 +03:00
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{
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return INTEGRITY_UNKNOWN;
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}
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#endif
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2011-08-11 08:22:51 +04:00
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static inline int evm_inode_setattr(struct dentry *dentry, struct iattr *attr)
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2011-05-13 20:53:38 +04:00
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{
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return 0;
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}
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2011-03-09 22:39:57 +03:00
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static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
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{
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return;
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}
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2021-05-14 18:27:48 +03:00
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static inline int evm_inode_setxattr(struct user_namespace *mnt_userns,
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struct dentry *dentry, const char *name,
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2011-03-09 22:38:26 +03:00
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const void *value, size_t size)
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{
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return 0;
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}
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static inline void evm_inode_post_setxattr(struct dentry *dentry,
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const char *xattr_name,
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const void *xattr_value,
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size_t xattr_value_len)
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{
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return;
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}
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2021-05-14 18:27:48 +03:00
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static inline int evm_inode_removexattr(struct user_namespace *mnt_userns,
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struct dentry *dentry,
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2011-03-09 22:38:26 +03:00
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const char *xattr_name)
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{
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return 0;
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}
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2011-03-09 22:39:18 +03:00
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static inline void evm_inode_post_removexattr(struct dentry *dentry,
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const char *xattr_name)
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{
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return;
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}
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2011-03-09 22:40:44 +03:00
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static inline int evm_inode_init_security(struct inode *inode,
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const struct xattr *xattr_array,
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struct xattr *evm)
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{
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2011-08-11 08:22:52 +04:00
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return 0;
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2011-03-09 22:40:44 +03:00
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}
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2021-05-14 18:27:45 +03:00
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static inline bool evm_revalidate_status(const char *xattr_name)
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{
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return false;
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}
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evm: Verify portable signatures against all protected xattrs
Currently, the evm_config_default_xattrnames array contains xattr names
only related to LSMs which are enabled in the kernel configuration.
However, EVM portable signatures do not depend on local information and a
vendor might include in the signature calculation xattrs that are not
enabled in the target platform.
Just including all xattrs names in evm_config_default_xattrnames is not a
safe approach, because a target system might have already calculated
signatures or HMACs based only on the enabled xattrs. After applying this
patch, EVM would verify those signatures and HMACs with all xattrs instead.
The non-enabled ones, which could possibly exist, would cause a
verification error.
Thus, this patch adds a new field named enabled to the xattr_list
structure, which is set to true if the LSM associated to a given xattr name
is enabled in the kernel configuration. The non-enabled xattrs are taken
into account only in evm_calc_hmac_or_hash(), if the passed security.evm
type is EVM_XATTR_PORTABLE_DIGSIG.
The new function evm_protected_xattr_if_enabled() has been defined so that
IMA can include all protected xattrs and not only the enabled ones in the
measurement list, if the new template fields xattrnames, xattrlengths or
xattrvalues have been included in the template format.
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
2021-05-28 10:38:09 +03:00
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static inline int evm_protected_xattr_if_enabled(const char *req_xattr_name)
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{
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return false;
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}
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2021-06-01 11:23:38 +03:00
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static inline int evm_read_protected_xattrs(struct dentry *dentry, u8 *buffer,
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int buffer_size, char type,
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bool canonical_fmt)
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{
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return -EOPNOTSUPP;
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}
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2013-03-26 00:12:27 +04:00
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#endif /* CONFIG_EVM */
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2011-03-09 22:38:26 +03:00
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#endif /* LINUX_EVM_H */
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