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This is the upstream repository for the Security Enhanced Linux (SELinux) userland libraries and tools. The software provided by this project complements the SELinux features integrated into the Linux kernel and is used by Linux distributions. All bugs an
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When selinux_restorecon() is used to relabel symlinks, it performs the following syscalls (as seen by running strace on restorecond): lstat("/root/symlink", {st_mode=S_IFLNK|0777, st_size=6, ...}) = 0 statfs("/root/symlink", 0x7ffd6bb4d090) = -1 ENOENT (No such file or directory) lstat("/root/symlink", {st_mode=S_IFLNK|0777, st_size=6, ...}) = 0 lgetxattr("/root/symlink", "security.selinux", "sysadm_u:object_r:user_home_t", 255) = 30 The second one triggers a SELinux check for lnk_file:read, as statfs() dereferences symbolic links. This call to statfs() is only used to find out whether "restoreconlast" xattr can be ignored, which is always the case for non-directory files (the first syscall, lstat(), is actually used to perform this check). Skip the call to statfs() when setrestoreconlast is already false. This silences an AVC denial that would otherwise be reported to audit.log (cf. https://github.com/SELinuxProject/refpolicy/pull/22). Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org> |
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checkpolicy | ||
dbus | ||
gui | ||
libselinux | ||
libsemanage | ||
libsepol | ||
mcstrans | ||
policycoreutils | ||
python | ||
restorecond | ||
sandbox | ||
scripts | ||
secilc | ||
semodule-utils | ||
.gitignore | ||
.travis.yml | ||
CleanSpec.mk | ||
Makefile | ||
README |
Please submit all bug reports and patches to selinux@vger.kernel.org. Subscribe by sending "subscribe selinux" in the body of an email to majordomo@vger.kernel.org. Build dependencies on Fedora: yum install audit-libs-devel bison bzip2-devel dbus-devel dbus-glib-devel flex flex-devel flex-static glib2-devel libcap-devel libcap-ng-devel pam-devel pcre-devel python-devel setools-devel swig xmlto redhat-rpm-config To build and install everything under a private directory, run: make DESTDIR=~/obj install install-pywrap To install as the default system libraries and binaries (overwriting any previously installed ones - dangerous!), on x86_64, run: make LIBDIR=/usr/lib64 SHLIBDIR=/lib64 install install-pywrap relabel or on x86 (32-bit), run: make install install-pywrap relabel This may render your system unusable if the upstream SELinux userspace lacks library functions or other dependencies relied upon by your distribution. If it breaks, you get to keep both pieces. To install libsepol on macOS (mainly for policy analysis): cd libsepol; make PREFIX=/usr/local install This requires GNU coreutils (brew install coreutils).