02 Nov, 2017
1 commit
-
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
Reviewed-by: Philippe Ombredanne
Reviewed-by: Thomas Gleixner
Signed-off-by: Greg Kroah-Hartman
01 Aug, 2017
1 commit
-
Ensure that genheaders fails with an error if too many permissions
are defined in a class to fit within an access vector. This is similar
to a check performed by checkpolicy when compiling the policy.Also, fix the suffix on the permission constants generated by this program.
Signed-off-by: Stephen Smalley
Signed-off-by: Paul Moore
19 May, 2017
1 commit
-
Adjusts for ReST markup and moves under LSM admin guide.
Cc: Paul Moore
Signed-off-by: Kees Cook
Signed-off-by: Jonathan Corbet
11 Mar, 2017
1 commit
-
Compiling with clang and -Wundef makes the compiler report a usage of
undefined PF_MAX macro in security/selinux/include/classmap.h:In file included from scripts/selinux/mdp/mdp.c:48:
security/selinux/include/classmap.h:37:31: warning: no previous
extern declaration for non-static variable 'secclass_map'
[-Wmissing-variable-declarations]
struct security_class_mapping secclass_map[] = {
^
security/selinux/include/classmap.h:235:5: error: 'PF_MAX' is not
defined, evaluates to 0 [-Werror,-Wundef]
#if PF_MAX > 43
^
In file included from scripts/selinux/genheaders/genheaders.c:17:
security/selinux/include/classmap.h:37:31: warning: no previous
extern declaration for non-static variable 'secclass_map'
[-Wmissing-variable-declarations]
struct security_class_mapping secclass_map[] = {
^
security/selinux/include/classmap.h:235:5: error: 'PF_MAX' is not
defined, evaluates to 0 [-Werror,-Wundef]
#if PF_MAX > 43
^PF_MAX is defined in include/linux/socket.h but not in
include/uapi/linux/socket.h. Therefore host programs have to rely on the
definition from libc's /usr/include/bits/socket.h, included by
.Fix the issue by using sys/socket.h in mdp and genheaders. When
classmap.h is included by security/selinux/avc.c, it uses the kernel
definition of PF_MAX, which makes the test consistent.Signed-off-by: Nicolas Iooss
Signed-off-by: Paul Moore
21 Dec, 2016
1 commit
-
Commit 3322d0d64f4e ("selinux: keep SELinux in sync with new capability
definitions") added a check on the defined capabilities without
explicitly including the capability header file which caused problems
when building genheaders for users of clang/llvm. Resolve this by
using the kernel headers when building genheaders, which is arguably
the right thing to do regardless, and explicitly including the
kernel's capability.h header file in classmap.h. We also update the
mdp build, even though it wasn't causing an error we really should
be using the headers from the kernel we are building.Reported-by: Nicolas Iooss
Signed-off-by: Paul Moore
14 Jul, 2015
1 commit
-
This fixes the compilation of policy generated by mdp with the recent
version of checkpolicy.Signed-off-by: Laurent Bigonville
Acked-by: Stephen Smalley
Signed-off-by: Paul Moore
20 Aug, 2014
1 commit
-
The Makefiles call the respective interpreter explicitly, but this makes
it easier to use the scripts manually.Signed-off-by: Michal Marek
19 Jul, 2014
1 commit
18 Jun, 2014
1 commit
-
Files added to hostprogs-y are cleaned. (See scripts/Makefile.clean)
Adding them to clean-files is redundant.Signed-off-by: Masahiro Yamada
Acked-by: Paul Moore
Signed-off-by: Paul Moore
10 Jun, 2014
1 commit
-
Signed-off-by: Masahiro Yamada
20 May, 2011
1 commit
-
move LSM-, credentials-, and keys-related files from Documentation/
to Documentation/security/,
add Documentation/security/00-INDEX, and
update all occurrences of Documentation/
to Documentation/security/.
04 Mar, 2011
1 commit
-
The security_is_socket_class() is auto-generated by genheaders based
on classmap.h to reduce maintenance effort when a new class is defined
in SELinux kernel. The name for any socket class should be suffixed by
"socket" and doesn't contain more than one substr of "socket".Signed-off-by: Harry Ciao
Signed-off-by: Eric Paris
Acked-by: Stephen Smalley
16 Mar, 2010
1 commit
-
Fix const warning in the genheaders script as a result of
changes to the headers, as noted here:http://linux.derkeiler.com/Mailing-Lists/Kernel/2010-03/msg03977.html
Reported-by: Stephen Rothwell
Signed-off-by: James Morris
23 Nov, 2009
1 commit
-
If a permission name is long enough the selinux class definition generation
tool will go into a infinite loop. This is because it's macro max() is
fooled into thinking it is dealing with unsigned numbers. This patch makes
sure the macro always uses signed number so 1 > -1.Signed-off-by: Eric Paris
Signed-off-by: James Morris
19 Nov, 2009
1 commit
-
scripts/selinux/genheaders/genheaders.c:20: warning: no previous prototype
for ?usage?
scripts/selinux/genheaders/genheaders.c:26: warning: no previous prototype
for ?stoupperx?Signed-off-by: Alan Cox
Acked-by: WANG Cong
Signed-off-by: James Morris
24 Oct, 2009
1 commit
-
The SELinux dynamic class work in c6d3aaa4e35c71a32a86ececacd4eea7ecfc316c
creates a number of dynamic header files and scripts. Add .gitignore files
so git doesn't complain about these.Signed-off-by: Eric Paris
Acked-by: Stephen D. Smalley
Signed-off-by: James Morris
07 Oct, 2009
2 commits
-
Add a simple utility (scripts/selinux/genheaders) and invoke it to
generate the kernel-private class and permission indices in flask.h
and av_permissions.h automatically during the kernel build from the
security class mapping definitions in classmap.h. Adding new kernel
classes and permissions can then be done just by adding them to classmap.h.Signed-off-by: Stephen Smalley
Signed-off-by: James Morris -
Modify SELinux to dynamically discover class and permission values
upon policy load, based on the dynamic object class/perm discovery
logic from libselinux. A mapping is created between kernel-private
class and permission indices used outside the security server and the
policy values used within the security server.The mappings are only applied upon kernel-internal computations;
similar mappings for the private indices of userspace object managers
is handled on a per-object manager basis by the userspace AVC. The
interfaces for compute_av and transition_sid are split for kernel
vs. userspace; the userspace functions are distinguished by a _user
suffix.The kernel-private class indices are no longer tied to the policy
values and thus do not need to skip indices for userspace classes;
thus the kernel class index values are compressed. The flask.h
definitions were regenerated by deleting the userspace classes from
refpolicy's definitions and then regenerating the headers. Going
forward, we can just maintain the flask.h, av_permissions.h, and
classmap.h definitions separately from policy as they are no longer
tied to the policy values. The next patch introduces a utility to
automate generation of flask.h and av_permissions.h from the
classmap.h definitions.The older kernel class and permission string tables are removed and
replaced by a single security class mapping table that is walked at
policy load to generate the mapping. The old kernel class validation
logic is completely replaced by the mapping logic.The handle unknown logic is reworked. reject_unknown=1 is handled
when the mappings are computed at policy load time, similar to the old
handling by the class validation logic. allow_unknown=1 is handled
when computing and mapping decisions - if the permission was not able
to be mapped (i.e. undefined, mapped to zero), then it is
automatically added to the allowed vector. If the class was not able
to be mapped (i.e. undefined, mapped to zero), then all permissions
are allowed for it if allow_unknown=1.avc_audit leverages the new security class mapping table to lookup the
class and permission names from the kernel-private indices.The mdp program is updated to use the new table when generating the
class definitions and allow rules for a minimal boot policy for the
kernel. It should be noted that this policy will not include any
userspace classes, nor will its policy index values for the kernel
classes correspond with the ones in refpolicy (they will instead match
the kernel-private indices).Signed-off-by: Stephen Smalley
Signed-off-by: James Morris
23 Sep, 2009
1 commit
-
Signed-off-by: Trevor Keith
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Sep, 2008
1 commit
-
Add gitignore file for scripts/selinux/mdp/mdp.
Signed-off-by: James Morris
27 Aug, 2008
1 commit
-
In August 2006 I posted a patch generating a minimal SELinux policy. This
week, David P. Quigley posted an updated version of that as a patch against
the kernel. It also had nice logic for auto-installing the policy.Following is David's original patch intro (preserved especially
bc it has stats on the generated policies):se interested in the changes there were only two significant
changes. The first is that the iteration through the list of classes
used NULL as a sentinel value. The problem with this is that the
class_to_string array actually has NULL entries in its table as place
holders for the user space object classes.The second change was that it would seem at some point the initial sids
table was NULL terminated. This is no longer the case so that iteration
has to be done on array length instead of looking for NULL.Some statistics on the policy that it generates:
The policy consists of 523 lines which contain no blank lines. Of those
523 lines 453 of them are class, permission, and initial sid
definitions. These lines are usually little to no concern to the policy
developer since they will not be adding object classes or permissions.
Of the remaining 70 lines there is one type, one role, and one user
statement. The remaining lines are broken into three portions. The first
group are TE allow rules which make up 29 of the remaining lines, the
second is assignment of labels to the initial sids which consist of 27
lines, and file system labeling statements which are the remaining 11.In addition to the policy.conf generated there is a single file_contexts
file containing two lines which labels the entire system with base_t.This policy generates a policy.23 binary that is 7920 bytes.
(then a few versions later...):
The new policy is 587 lines (stripped of blank lines) with 476 of those
lines being the boilerplate that I mentioned last time. The remaining
111 lines have the 3 lines for type, user, and role, 70 lines for the
allow rules (one for each object class including user space object
classes), 27 lines to assign types to the initial sids, and 11 lines for
file system labeling. The policy binary is 9194 bytes.Changelog:
Aug 26: Added Documentation/SELinux.txt
Aug 26: Incorporated a set of comments by Stephen Smalley:
1. auto-setup SELINUXTYPE=dummy
2. don't auto-install if selinux is enabled with
non-dummy policy
3. don't re-compute policy version
4. /sbin/setfiles not /usr/sbin/setfiles
Aug 22: As per JMorris comments, made sure make distclean
cleans up the mdp directory.
Removed a check for file_contexts which is now
created in the same file as the check, making it
superfluous.Signed-off-by: Serge Hallyn
Signed-off-by: David Quigley
Signed-off-by: James Morris
