patch 5e15a52aaa cleans up the process_file() routine,
but introduced a bug. If the binary file cannot be
opened, always attempt to fall back to the textual file,
this was not occurring.
The logic should be:
1. Open the newest file between base path + suffix and
base_path + suffix + ".bin"
2. If anything fails, attempt to load the oldest file.
The result, with a concrete example, would be:
If file_contexts is the newest file, and it cannot be
processed, the code will fall back to file_contexts.bin
and vice versa.
Signed-off-by: William Roberts <william.c.roberts@intel.com>
This patch moves all pcre1/2 dependencies into the new files regex.h
and regex.c implementing the common denominator of features needed
by libselinux. The compiler flag -DUSE_PCRE2 toggles between the
used implementations.
As of this patch libselinux supports either pcre or pcre2 but not
both at the same time. The persistently stored file contexts
information differs. This means libselinux can only load file
context files generated by sefcontext_compile build with the
same pcre variant.
Also, for pcre2 the persistent format is architecture dependent.
Stored precompiled regular expressions can only be used on the
same architecture they were generated on. If pcre2 is used,
sefcontext_compile now respects the "-r". This flag makes
sefcontext_compile include the precompiled regular expressions
in the output file. The default is to omit them, so that the
output remains portable at the cost of having to recompile
the regular expressions at load time, or rather on first use.
Signed-off-by: Janis Danisevskis <jdanis@google.com>
The current process_file() code will open the file
twice on the case of a binary file, correct this.
The general flow through process_file() was a bit
difficult to read, streamline the routine to be
more readable.
Detailed statistics of before and after:
Source lines of code reported by cloc on modified files:
before: 735
after: 742
Object size difference:
before: 195530 bytes
after: 195485 bytes
Signed-off-by: William Roberts <william.c.roberts@intel.com>
pcre_study() can return a NULL result if no additional information
could be determined for the pattern. Thus, sefcontext_compile
needs to correctly handle the case where the study data is NULL
when generating file_contexts.bin, and libselinux needs to correctly
handle it when loading file_contexts.bin. Fix them both.
This change enables:
semanage fcontext -a -t httpd_exec_t "(/.*)?"
to succeed, since the regex itself is valid but there is no
additional information produced by pcre_study().
Reported-by: Vit Mojzis <vmojzis@redhat.com>
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
Add additional error handling, flags, xdev handling, alt_rootpath and
add/remove non-seclabel fs's to support setfiles(8), restorecon(8)
and restorecond(8) functionality.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
This patch adds inode evaluation services from policycoreutiles/setfiles
to selinux_restorecon.c
The overall objective is to modify restorecon(8) and setfiles(8)
to use selinux_restorecon(3) services.
Signed-off-by: Richard Haines <richard_c_haines@btinternet.com>
There was a change in swig-3.10 to use importlib instead of imp. While
the implementation with imp looked for _selinux.so also into the same directory
as __init__.py is, a new module with importlib searchs only standard paths.
It means that we need to move _selinux.so from $(PYLIBDIR)/site-packages/selinux/
to $(PYLIBDIR)/site-packages/.
Fixes:
>>> import selinux
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib64/python2.7/site-packages/selinux/__init__.py", line 21, in <module>
_selinux = swig_import_helper()
File "/usr/lib64/python2.7/site-packages/selinux/__init__.py", line 20, in swig_import_helper
return importlib.import_module('_selinux')
File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
ImportError: No module named _selinux
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Improve the description by mentioning that if is_selinux_mls_enabled(),
it simply means that the kernel has MLS support and the policy contains
MLS features. To check whether MLS support is enabled on the running
system, use selinux_getpolicytype().
Signed-off-by: David King <dking@redhat.com>
filepath needs to be resolved first in order to be correctly found by
selabel_lookup_raw()
Fixes:
$ matchpathcon -V passwd
passwd has context system_u:object_r:passwd_file_t:s0, should be
system_u:object_r:passwd_file_t:s0
$ echo $?
1
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Snapper needs a way how to set a proper selinux context on btrfs
subvolumes originating in snapshot create command. Fs can't handle it on
its own so snapper will enforce .snapshots subvolume relabeling
according to a file returned by selinux_snapperd_contexts_path().
The format of the file will be similar to other contexts file:
snapperd_data = system_u:object_r:snapperd_data_t:s0
Fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1247530https://bugzilla.redhat.com/show_bug.cgi?id=1247532
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Class and perms should come from the policy being used for analysis,
not the system policy so use sepol_ interfaces
Change-Id: Ia0590ed2514249fd98810a8d4fe87f8bf5280561
Signed-off-by: Joshua Brindle <brindle@quarksecurity.com>
This patch is part of the Debian effort to make the build reproducible
Thank to Reiner Herrmann <reiner@reiner-h.de> for the patches
Signed-off-by: Laurent Bigonville <bigon@bigon.be>
Compilation tools respects certain environment variables, like CC.
However, in libselinux and libsemanage, they are not respected
everywhere. This command fixes respect for those variables, falling back
to the previous hardcoded values if not specified.
Temporarily mounting /proc within selinuxfs_exists() can cause
problems since it can be called by a libselinux constructor and
therefore may be invoked by every program linked with libselinux.
Since this was only motivated originally by a situation where
selinuxfs_exists() was called from selinux_init_load_policy()
before /proc was mounted, fix it in selinux_init_load_policy() instead.
This reverts commit 5a8d8c499b
("libselinux: only mount /proc if necessary") and
commit 9df4988846
("libselinux: Mount procfs before checking /proc/filesystems").
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
The man page contains 'prce' instead of 'pcre'
Reported-by: Milos Malik <mmalik@redhat.com>
Signed-off-by: Petr Lautrbach <plautrba@redhat.com>
Signed-off-by: James Carter <jwcart2@tycho.nsa.gov>
Commit 9df4988846 ("libselinux: Mount procfs before checking
/proc/filesystems") changed selinuxfs_exists() to always try
mounting /proc before reading /proc/filesystems. However, this is
unnecessary if /proc is already mounted and can produce avc denials
if the process is not allowed to perform the mount. Check first
to see if /proc is already present and only try the mount if it is not.
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>
getpidcon documentation does not specify that a pid of 0 refers to the
current process, and getcon exists specifically to provide this
functionality, and getpidcon(getpid()) would provide it as well.
Disallow pid values <= 0 that may lead to unintended behavior in
userspace object managers.
Signed-off-by: Daniel Cashman <dcashman@android.com>
