glibc/nscd/selinux.c

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/* SELinux access controls for nscd.
Copyright (C) 2004-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Matthew Rickard <mjricka@epoch.ncsc.mil>, 2004.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include <error.h>
#include <errno.h>
#include <libintl.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/prctl.h>
#include <selinux/avc.h>
#include <selinux/selinux.h>
#ifdef HAVE_LIBAUDIT
# include <libaudit.h>
#endif
#include "dbg_log.h"
#include "selinux.h"
#ifdef HAVE_SELINUX
/* Global variable to tell if the kernel has SELinux support. */
int selinux_enabled;
/* Define mappings of request type to AVC permission name. */
static const char *perms[LASTREQ] =
{
[GETPWBYNAME] = "getpwd",
[GETPWBYUID] = "getpwd",
[GETGRBYNAME] = "getgrp",
[GETGRBYGID] = "getgrp",
[GETHOSTBYNAME] = "gethost",
[GETHOSTBYNAMEv6] = "gethost",
[GETHOSTBYADDR] = "gethost",
[GETHOSTBYADDRv6] = "gethost",
[SHUTDOWN] = "admin",
[GETSTAT] = "getstat",
[INVALIDATE] = "admin",
[GETFDPW] = "shmempwd",
[GETFDGR] = "shmemgrp",
[GETFDHST] = "shmemhost",
[GETAI] = "gethost",
[INITGROUPS] = "getgrp",
[GETSERVBYNAME] = "getserv",
[GETSERVBYPORT] = "getserv",
[GETFDSERV] = "shmemserv",
[GETNETGRENT] = "getnetgrp",
[INNETGR] = "getnetgrp",
[GETFDNETGR] = "shmemnetgrp",
};
/* Store an entry ref to speed AVC decisions. */
static struct avc_entry_ref aeref;
/* Thread to listen for SELinux status changes via netlink. */
static pthread_t avc_notify_thread;
#ifdef HAVE_LIBAUDIT
/* Prototype for supporting the audit daemon */
static void log_callback (const char *fmt, ...);
#endif
/* Prototypes for AVC callback functions. */
static void *avc_create_thread (void (*run) (void));
static void avc_stop_thread (void *thread);
static void *avc_alloc_lock (void);
static void avc_get_lock (void *lock);
static void avc_release_lock (void *lock);
static void avc_free_lock (void *lock);
/* AVC callback structures for use in avc_init. */
static const struct avc_log_callback log_cb =
{
#ifdef HAVE_LIBAUDIT
.func_log = log_callback,
#else
.func_log = dbg_log,
#endif
.func_audit = NULL
};
static const struct avc_thread_callback thread_cb =
{
.func_create_thread = avc_create_thread,
.func_stop_thread = avc_stop_thread
};
static const struct avc_lock_callback lock_cb =
{
.func_alloc_lock = avc_alloc_lock,
.func_get_lock = avc_get_lock,
.func_release_lock = avc_release_lock,
.func_free_lock = avc_free_lock
};
#ifdef HAVE_LIBAUDIT
/* The audit system's netlink socket descriptor */
static int audit_fd = -1;
/* When an avc denial occurs, log it to audit system */
static void
log_callback (const char *fmt, ...)
{
if (audit_fd >= 0)
{
va_list ap;
va_start (ap, fmt);
char *buf;
int e = vasprintf (&buf, fmt, ap);
if (e < 0)
{
buf = alloca (BUFSIZ);
vsnprintf (buf, BUFSIZ, fmt, ap);
}
/* FIXME: need to attribute this to real user, using getuid for now */
audit_log_user_avc_message (audit_fd, AUDIT_USER_AVC, buf, NULL, NULL,
NULL, getuid ());
if (e >= 0)
free (buf);
va_end (ap);
}
}
/* Initialize the connection to the audit system */
static void
audit_init (void)
{
audit_fd = audit_open ();
if (audit_fd < 0
/* If kernel doesn't support audit, bail out */
&& errno != EINVAL && errno != EPROTONOSUPPORT && errno != EAFNOSUPPORT)
dbg_log (_("Failed opening connection to the audit subsystem: %m"));
}
# ifdef HAVE_LIBCAP
static const cap_value_t new_cap_list[] =
{ CAP_AUDIT_WRITE };
# define nnew_cap_list (sizeof (new_cap_list) / sizeof (new_cap_list[0]))
static const cap_value_t tmp_cap_list[] =
{ CAP_AUDIT_WRITE, CAP_SETUID, CAP_SETGID };
# define ntmp_cap_list (sizeof (tmp_cap_list) / sizeof (tmp_cap_list[0]))
cap_t
preserve_capabilities (void)
{
if (getuid () != 0)
/* Not root, then we cannot preserve anything. */
return NULL;
if (prctl (PR_SET_KEEPCAPS, 1) == -1)
{
dbg_log (_("Failed to set keep-capabilities"));
do_exit (EXIT_FAILURE, errno, _("prctl(KEEPCAPS) failed"));
/* NOTREACHED */
}
cap_t tmp_caps = cap_init ();
cap_t new_caps = NULL;
if (tmp_caps != NULL)
new_caps = cap_init ();
if (tmp_caps == NULL || new_caps == NULL)
{
if (tmp_caps != NULL)
cap_free (tmp_caps);
dbg_log (_("Failed to initialize drop of capabilities"));
do_exit (EXIT_FAILURE, 0, _("cap_init failed"));
}
/* There is no reason why these should not work. */
cap_set_flag (new_caps, CAP_PERMITTED, nnew_cap_list,
(cap_value_t *) new_cap_list, CAP_SET);
cap_set_flag (new_caps, CAP_EFFECTIVE, nnew_cap_list,
(cap_value_t *) new_cap_list, CAP_SET);
cap_set_flag (tmp_caps, CAP_PERMITTED, ntmp_cap_list,
(cap_value_t *) tmp_cap_list, CAP_SET);
cap_set_flag (tmp_caps, CAP_EFFECTIVE, ntmp_cap_list,
(cap_value_t *) tmp_cap_list, CAP_SET);
int res = cap_set_proc (tmp_caps);
cap_free (tmp_caps);
if (__glibc_unlikely (res != 0))
{
cap_free (new_caps);
[BZ #2510, BZ #2830, BZ #3137, BZ #3313, BZ #3426, BZ #3465, BZ #3480, BZ #3483, BZ #3493, BZ #3514, BZ #3515, BZ #3664, BZ #3673, BZ #3674] 2007-01-11 Jakub Jelinek <jakub@redhat.com> * sysdeps/i386/soft-fp/sfp-machine.h: Remove. * sysdeps/x86_64/soft-fp/sfp-machine.h: Likewise. 2007-01-10 Ulrich Drepper <drepper@redhat.com> * io/fts.c: Make sure fts_cur is always valid after return from fts_read. Patch by Miloslav Trmac <mitr@redhat.com>. 2006-10-27 Richard Sandiford <richard@codesourcery.com> * elf/elf.h (R_MIPS_GLOB_DAT): Define. (R_MIPS_NUM): Bump by 1. 2007-01-03 Jakub Jelinek <jakub@redhat.com> * posix/execvp.c: Include alloca.h. (allocate_scripts_argv): Renamed to... (scripts_argv): ... this. Don't allocate buffer here nor count arguments. (execvp): Use alloca if possible. * posix/Makefile: Add rules to build and run tst-vfork3 test. * posix/tst-vfork3.c: New test. * stdlib/Makefile (tst-strtod3-ENV): Define. 2007-01-02 Ulrich Drepper <drepper@redhat.com> * posix/getconf.c: Update copyright year. * nss/getent.c: Likewise. * iconv/iconvconfig.c: Likewise. * iconv/iconv_prog.c: Likewise. * elf/ldconfig.c: Likewise. * catgets/gencat.c: Likewise. * csu/version.c: Likewise. * elf/ldd.bash.in: Likewise. * elf/sprof.c (print_version): Likewise. * locale/programs/locale.c: Likewise. * locale/programs/localedef.c: Likewise. * nscd/nscd.c (print_version): Likewise. * debug/xtrace.sh: Likewise. * malloc/memusage.sh: Likewise. * malloc/mtrace.pl: Likewise. * debug/catchsegv.sh: Likewise. 2006-12-24 Ulrich Drepper <drepper@redhat.com> * malloc/malloc.c (sYSMALLOc): Remove some unnecessary alignment attempts. 2006-12-23 Ulrich Drepper <drepper@redhat.com> * posix/wordexp.c: Remove some unnecessary tests. 2006-12-20 SUGIOKA Toshinobu <sugioka@itonet.co.jp> * sysdeps/unix/sysv/linux/sh/bits/shm.h: New file. * nss/getXXbyYY_r.c: Include atomic.h. (INTERNAL (REENTRANT_NAME)): Write startp after start_fct, add atomic_write_barrier () in between. 2006-11-28 Jakub Jelinek <jakub@redhat.com> * elf/dl-support.c: Include dl-procinfo.h. * sysdeps/powerpc/dl-procinfo.h (PPC_PLATFORM_POWER4, PPC_PLATFORM_PPC970, PPC_PLATFORM_POWER5, PPC_PLATFORM_POWER5_PLUS, PPC_PLATFORM_POWER6, PPC_PLATFORM_CELL_BE, PPC_PLATFORM_POWER6X): Define. (_dl_string_platform): Use PPC_PLATFORM_* macros instead of hardcoded constants. * sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_platform): Use PPC_PLATFORM_* macros for array designators. 2006-11-11 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_cap_flags): Add 3 new cap names to the beginning. (_dl_powerpc_platforms): Add "power6x". * sysdeps/powerpc/dl-procinfo.h (_DL_HWCAP_FIRST): Decrease. (HWCAP_IMPORTANT): Add PPC_FEATURE_HAS_DFP. (_DL_PLATFORMS_COUNT): Increase. (_dl_string_platform): Handle power6x case. * sysdeps/powerpc/sysdep.h (PPC_FEATURE_PA6T, PPC_FEATURE_HAS_DFP, PPC_FEATURE_POWER6_EXT): Define. (PPC_FEATURE_POWER5, PPC_FEATURE_POWER5_PLUS): Correct Comment. [-2^31 .. 2^31) range. * sysdeps/unix/sysv/linux/bits/statvfs.h: Define ST_RELATIME. * sysdeps/unix/sysv/linux/internal_statvfs.c (__statvfs_getflags): Handle relatime mount option. 2006-12-13 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S: Include kernel-features.h. 2006-12-11 Ulrich Drepper <drepper@redhat.com> * stdlib/strtod_l.c (____STRTOF_INTERNAL): Parse thousand separators also if no non-zero digits found. * stdlib/Makefile (tests): Add tst-strtod3. [BZ #3664] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Fix test to recognize empty parsed strings. * stdlib/Makefile (tests): Add tst-strtod2. * stdlib/tst-strtod2.c: New file. [BZ #3673] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Fix exp_limit computation. * stdlib/Makefile (tests): Add tst-atof2. * stdlib/tst-atof2.c: New file. [BZ #3674] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Adjust exponent value correctly if removing trailing zero of hex-float. * stdlib/Makefile (tests): Add tst-atof1. * stdlib/tst-atof1.c: New file. * misc/mntent_r.c (__hasmntopt): Check p[optlen] even when p == rest. Start searching for next comma at p rather than rest. * misc/Makefile (tests): Add tst-mntent2. * misc/tst-mntent2.c: New test. 2006-12-08 Ulrich Drepper <drepper@redhat.com> * malloc/memusage.c: Handle realloc with new size of zero and non-NULL pointer correctly. (me): Really write first record twice. (struct entry): Make format bi-arch safe. (dest): Write out more realloc statistics. * malloc/memusagestat.c (struct entry): Make format bi-arch safe. 2006-12-05 Jakub Jelinek <jakub@redhat.com> * nis/nis_subr.c (nis_getnames): Revert last change. 2006-12-03 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/unix/sysv/linux/sh/sys/io.h: Removed. 2006-11-30 H.J. Lu <hongjiu.lu@intel.com> * sysdeps/i386/i686/memcmp.S: Use jump table as the base of jump table entries. 2006-11-30 Jan Kratochvil <jan.kratochvil@redhat.com> * sysdeps/unix/sysv/linux/i386/clone.S: Provide CFI for the outermost `clone' function to ensure proper unwinding stop of gdb. * sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise. 2006-12-01 Ulrich Drepper <drepper@redhat.com> * nscd/nscd.init: Remove obsolete and commented-out -S option handling. 2006-11-23 Jakub Jelinek <jakub@redhat.com> [BZ #3514] * manual/string.texi (strncmp): Fix pastos from wcscmp description. [BZ #3515] * manual/string.texi (strtok): Remove duplicate paragraph. 2006-12-01 Jan Kratochvil <jan.kratochvil@redhat.com> * sysdeps/unix/sysv/linux/x86_64/sigaction.c: Fix compatibility with libgcc not supporting `rflags' unwinding (register # >= 17). 2006-11-30 Jakub Jelinek <jakub@redhat.com> * sunrpc/svc_run.c (svc_run): Set my_pollfd to new_pollfd if realloc succeeded. 2006-11-29 Daniel Jacobowitz <dan@codesourcery.com> Jakub Jelinek <jakub@redhat.com> Jan Kratochvil <jan.kratochvil@redhat.com> * sysdeps/unix/sysv/linux/x86_64/sigaction.c (restore_rt): Add correct unwind information. * sysdeps/unix/sysv/linux/x86_64/Makefile: Provide symbols for 'restore_rt' even in the 'signal' directory. * sysdeps/unix/sysv/linux/x86_64/ucontext_i.sym: Extend the regs list. malloc crashed. Don't allocate memory unnecessarily in each loop. 2006-10-21 Jakub Jelinek <jakub@redhat.com> * resolv/mapv4v6addr.h (map_v4v6_address): Fix last change. 2006-11-20 Ulrich Drepper <drepper@redhat.com> * resolv/mapv4v6addr.h (map_v4v6_address): Optimize a bit. 2006-11-18 Bruno Haible <bruno@clisp.org> * sysdeps/unix/sysv/linux/i386/getgroups.c (__getgroups): Invoke __sysconf only after having tried to call getgroups32. 2006-11-19 Ulrich Drepper <drepper@redhat.com> * nss/nss_files/files-hosts.c (LINE_PARSER): Support IPv6-style addresses for IPv4 queries if they can be mapped. 2006-11-16 Jakub Jelinek <jakub@redhat.com> * sysdeps/x86_64/fpu/s_copysignf.S (__copysignf): Switch to .text. * sysdeps/x86_64/fpu/s_copysign.S (__copysign): Likewise. (signmask): Add .size directive. (othermask): Add .type directive. 2006-11-14 Ulrich Drepper <drepper@redhat.com> * po/nl.po: Update from translation team. * timezone/zdump.c: Redo fix for BZ #3137. 2006-11-14 Jakub Jelinek <jakub@redhat.com> * nss/nss_files/files-alias.c (get_next_alias): Set line back to first_unused after parsing :include: file. * timezone/africa: Update from tzdata2006o. * timezone/antarctica: Likewise. * timezone/asia: Likewise. * timezone/australasia: Likewise. * timezone/backward: Likewise. * timezone/europe: Likewise. * timezone/iso3166.tab: Likewise. * timezone/northamerica: Likewise. * timezone/southamerica: Likewise. * timezone/zone.tab: Likewise. * time/tzfile.c (__tzfile_read): Extend to handle new file format on machines with 64-bit time_t. * timezone/checktab.awk: Update from tzcode2006o. * timezone/ialloc.c: Likewise. * timezone/private.h: Likewise. * timezone/scheck.c: Likewise. * timezone/tzfile.h: Likewise. * timezone/tzselect.ksh: Likewise. * timezone/zdump.c: Likewise. * timezone/zic.c: Likewise. [BZ #3483] * elf/ldconfig.c (main): Call setlocale and textdomain. Patch mostly by Benno Schulenberg <bensberg@justemail.net>. [BZ #3480] * manual/argp.texi: Fix typos. * manual/charset.texi: Likewise. * manual/errno.texi: Likewise. * manual/filesys.texi: Likewise. * manual/lang.texi: Likewise. * manual/maint.texi: Likewise. * manual/memory.texi: Likewise. * manual/message.texi: Likewise. * manual/resource.texi: Likewise. * manual/search.texi: Likewise. * manual/signal.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/sysinfo.texi: Likewise. * manual/syslog.texi: Likewise. * manual/time.texi: Likewise. Patch by Ralf Wildenhues <Ralf.Wildenhues@gmx.de>. [BZ #3465] * sunrpc/clnt_raw.c: Minimal message improvements. * sunrpc/pm_getmaps.c: Likewise. * nis/nss_nisplus/nisplus-publickey.c: Likewise. * nis/nis_print_group_entry.c: Likewise. * locale/programs/repertoire.c: Likewise. * locale/programs/charmap.c: Likewise. * malloc/memusage.sh: Likewise. * elf/dl-deps.c: Likewise. * locale/programs/ld-collate.c: Likewise. * libio/vswprintf.c: Likewise. * malloc/memusagestat.c: Likewise. * sunrpc/auth_unix.c: Likewise. * sunrpc/rpc_main.c: Likewise. * nscd/cache.c: Likewise. * locale/programs/repertoire.c: Unify output messages. * locale/programs/charmap.c: Likewise. * locale/programs/ld-ctype.c: Likewise. * locale/programs/ld-monetary.c: Likewise. * locale/programs/ld-numeric.c: Likewise. * locale/programs/ld-time.c: Likewise. * elf/ldconfig.c: Likewise. * nscd/selinux.c: Likewise. * elf/cache.c: Likewise. Patch mostly by Benno Schulenberg <bensberg@justemail.net>. 2006-11-10 Jakub Jelinek <jakub@redhat.com> * string/strxfrm_l.c (STRXFRM): Fix trailing \1 optimization if N is one bigger than return value. * string/tst-strxfrm2.c (do_test): Also test strxfrm with l1 + 1 and l1 last arguments, if buf is defined, verify the return value equals to strlen (buf) and verify no byte beyond passed length is modified. 2006-11-10 Ulrich Drepper <drepper@redhat.com> * po/sv.po: Update from translation team. * sysdeps/gnu/siglist.c (__old_sys_siglist, __old_sys_sigabbrev): Use __new_sys_siglist instead of _sys_siglist_internal as second macro argument. (_old_sys_siglist): Use declare_symbol_alias macro instead of strong_alias. 2006-11-09 Ulrich Drepper <drepper@redhat.com> [BZ #3493] * posix/unistd.h (sysconf): Remove const attribute. * sysdeps/posix/getaddrinfo.c (getaddrinfo): Fix test for temporary or deprecated addresses. Patch by Sridhar Samudrala <sri@us.ibm.com>. * string/Makefile (tests): Add tst-strxfrm2. * string/tst-strxfrm2.c: New file. 2006-10-09 Jakub Jelinek <jakub@redhat.com> * elf/dl-debug.c (_dl_debug_initialize): Check r->r_map for 0 rather than r->r_brk. * string/strxfrm_l.c (STRXFRM): Do the trailing \1 removal optimization even if needed > n. 2006-11-07 Jakub Jelinek <jakub@redhat.com> * include/libc-symbols.h (declare_symbol): Rename to... (declare_symbol_alias): ... this. Add ORIGINAL argument, imply strong_alias (ORIGINAL, SYMBOL) in asm to make sure it preceedes .size directive. * sysdeps/gnu/errlist-compat.awk: Adjust for declare_symbol_alias changes. * sysdeps/gnu/siglist.c: Likewise. 2006-11-03 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/fpu/bits/mathinline.h [__LIBC_INTERNAL_MATH_INLINES]: Moved to ... * sysdeps/powerpc/fpu/math_private.h: ...here. New file. 2006-11-05 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/i386/sysconf.c (intel_check_word): Update handling of cache descriptor 0x49 for new models. * sysdeps/unix/sysv/linux/x86_64/sysconf.c (intel_check_word): Likewise. 2006-11-02 Ulrich Drepper <drepper@redhat.com> * configure.in: Work around ld --help change and avoid -z relro test completely if the architecture doesn't care about security. 2006-11-01 Ulrich Drepper <drepper@redhat.com> * po/sv.po: Update from translation team. 2006-10-31 Ulrich Drepper <drepper@redhat.com> * stdlib/atexit.c (atexit): Don't mark as hidden when used to generate compatibility version. 2006-10-29 Ulrich Drepper <drepper@redhat.com> * configure.in: Relax -z relro requirement a bit. * po/sv.po: Update from translation team. 2006-10-29 Jakub Jelinek <jakub@redhat.com> * elf/dl-sym.c (do_sym): Use RTLD_SINGLE_THREAD_P. * elf/dl-runtime.c (_dl_fixup, _dl_profile_fixup): Likewise. * elf/dl-close.c (_dl_close_worker): Likewise. * elf/dl-open.c (_dl_open_worker): Likewise. * sysdeps/generic/sysdep-cancel.h (RTLD_SINGLE_THREAD_P): Define. * configure.in: Require assembler support for visibility, compiler support for visibility and aliases, linker support for various -z options. * Makeconfig: Remove conditional code which now is unnecessary. * config.h.in: Likewise. * config.make.in: Likewise. * dlfcn/Makefile: Likewise. * elf/Makefile: Likewise. * elf/dl-load.c: Likewise. * elf/rtld.c: Likewise. * include/libc-symbols.h: Likewise. * include/stdio.h: Likewise. * io/Makefile: Likewise. * io/fstat.c: Likewise. * io/fstat64.c: Likewise. * io/fstatat.c: Likewise. * io/fstatat64.c: Likewise. * io/lstat.c: Likewise. * io/lstat64.c: Likewise. * io/mknod.c: Likewise. * io/mknodat.c: Likewise. * io/stat.c: Likewise. * io/stat64.c: Likewise. * libio/stdio.c: Likewise. * nscd/Makefile: Likewise. * stdlib/Makefile: Likewise. * stdlib/atexit.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/i386/dl-machine.h: Likewise. * sysdeps/i386/sysdep.h: Likewise. * sysdeps/i386/i686/memcmp.S: Likewise. * sysdeps/powerpc/powerpc32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/sigaction.c: Likewise. * Makerules: USE_TLS support is now default. * tls.make.c: Likewise. * csu/Versions: Likewise. * csu/libc-start.c: Likewise. * csu/libc-tls.c: Likewise. * csu/version.c: Likewise. * dlfcn/dlinfo.c: Likewise. * elf/dl-addr.c: Likewise. * elf/dl-cache.c: Likewise. * elf/dl-close.c: Likewise. * elf/dl-iteratephdr.c: Likewise. * elf/dl-load.c: Likewise. * elf/dl-lookup.c: Likewise. * elf/dl-object.c: Likewise. * elf/dl-open.c: Likewise. * elf/dl-reloc.c: Likewise. * elf/dl-support.c: Likewise. * elf/dl-sym.c: Likewise. * elf/dl-sysdep.c: Likewise. * elf/dl-tls.c: Likewise. * elf/ldconfig.c: Likewise. * elf/rtld.c: Likewise. * elf/tst-tls-dlinfo.c: Likewise. * elf/tst-tls1.c: Likewise. * elf/tst-tls10.h: Likewise. * elf/tst-tls14.c: Likewise. * elf/tst-tls2.c: Likewise. * elf/tst-tls3.c: Likewise. * elf/tst-tls4.c: Likewise. * elf/tst-tls5.c: Likewise. * elf/tst-tls6.c: Likewise. * elf/tst-tls7.c: Likewise. * elf/tst-tls8.c: Likewise. * elf/tst-tls9.c: Likewise. * elf/tst-tlsmod1.c: Likewise. * elf/tst-tlsmod13.c: Likewise. * elf/tst-tlsmod13a.c: Likewise. * elf/tst-tlsmod14a.c: Likewise. * elf/tst-tlsmod2.c: Likewise. * elf/tst-tlsmod3.c: Likewise. * elf/tst-tlsmod4.c: Likewise. * elf/tst-tlsmod5.c: Likewise. * elf/tst-tlsmod6.c: Likewise. * include/errno.h: Likewise. * include/link.h: Likewise. * include/tls.h: Likewise. * locale/global-locale.c: Likewise. * locale/localeinfo.h: Likewise. * malloc/arena.c: Likewise. * malloc/hooks.c: Likewise. * malloc/malloc.c: Likewise. * resolv/Versions: Likewise. * sysdeps/alpha/dl-machine.h: Likewise. * sysdeps/alpha/libc-tls.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/generic/tls.h: Likewise. * sysdeps/i386/dl-machine.h: Likewise. * sysdeps/ia64/dl-machine.h: Likewise. * sysdeps/ia64/libc-tls.c: Likewise. * sysdeps/mach/hurd/fork.c: Likewise. * sysdeps/mach/hurd/i386/tls.h: Likewise. * sysdeps/powerpc/powerpc32/dl-machine.c: Likwise. * sysdeps/powerpc/powerpc32/dl-machine.h: Likewise. * sysdeps/powerpc/powerpc64/dl-machine.h: Likewise. * sysdeps/s390/libc-tls.c: Likewise. * sysdeps/s390/s390-32/dl-machine.h: Likewise. * sysdeps/s390/s390-64/dl-machine.h: Likewise. * sysdeps/sh/dl-machine.h: Likewise. * sysdeps/sparc/sparc32/dl-machine.h: Likewise. * sysdeps/sparc/sparc64/dl-machine.h: Likewise. * sysdeps/x86_64/dl-machine.h: Likewise. [BZ #3426] * stdlib/stdlib.h: Adjust comment for canonicalize_file_name to reality. 2006-10-27 Jakub Jelinek <jakub@redhat.com> * elf/dl-lookup.c (_dl_debug_bindings): Remove unused symbol_scope argument. (_dl_lookup_symbol_x): Adjust caller. * sysdeps/generic/ldsodefs.h (struct link_namespaces): Remove _ns_global_scope. * elf/rtld.c (dl_main): Don't initialize _ns_global_scope. * elf/dl-libc.c: Revert l_scope name changes. * elf/dl-load.c: Likewise. * elf/dl-object.c: Likewise. * elf/rtld.c: Likewise. * elf/dl-close.c (_dl_close): Likewise. * elf/dl-open.c (dl_open_worker): Likewise. If not SINGLE_THREAD_P, always use __rtld_mrlock_{change,done}. Always free old scope list here if not l_scope_mem. * elf/dl-runtime.c (_dl_fixup, _dl_profile_fixup): Revert l_scope name change. Never free scope list here. Just __rtld_mrlock_lock before the lookup and __rtld_mrlock_unlock it after the lookup. * elf/dl-sym.c: Likewise. * include/link.h (struct r_scoperec): Remove. (struct link_map): Replace l_scoperec with l_scope, l_scoperec_mem with l_scope_mem and l_scoperec_lock with l_scope_lock. 2006-10-25 Ulrich Drepper <drepper@redhat.com> * sysdeps/gnu/netinet/tcp.h: Define TCP_CONGESTION. 2006-10-18 Ulrich Drepper <drepper@redhat.com> * configure.in: Disable building profile libraries by default. 2006-10-18 Ulrich Drepper <drepper@redhat.com> * elf/dl-lookup.c (_dl_lookup_symbol_x): Add warning to _dl_lookup_symbol_x code. 2006-10-17 Jakub Jelinek <jakub@redhat.com> * elf/dl-runtime.c: Include sysdep-cancel.h. (_dl_fixup, _dl_profile_fixup): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. * elf/dl-sym.c: Include sysdep-cancel.h. (do_sym): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. * elf/dl-close.c: Include sysdep-cancel.h. (_dl_close): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. * elf/dl-open.c: Include sysdep-cancel.h. (dl_open_worker): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. 2006-10-17 Jakub Jelinek <jakub@redhat.com> [BZ #3313] * malloc/malloc.c (malloc_consolidate): Set maxfb to address of last fastbin rather than end of fastbin array. 2006-10-18 Ulrich Drepper <drepper@redhat.com> * sysdeps/i386/i486/bits/atomic.h (catomic_decrement): Use correct body macro. * sysdeps/x86_64/bits/atomic.h (__arch_c_compare_and_exchange_val_64_acq): Add missing casts. (catomic_decrement): Use correct body macro. 2006-10-17 Jakub Jelinek <jakub@redhat.com> * include/atomic.h: Add a unique prefix to all local variables in macros. * csu/tst-atomic.c (do_test): Test also catomic_* macros. 2006-10-14 Ulrich Drepper <drepper@redhat.com> * resolv/arpa/nameser.h: Document that ns_t_a6 is deprecated. [BZ #3313] * malloc/malloc.c (malloc_consolidate): Don't use get_fast_max to determine highest fast bin to consolidate, always look into all of them. (do_check_malloc_state): Only require for empty bins for large sizes in main arena. * libio/stdio.h: Add more __wur attributes. 2006-11-12 Andreas Jaeger <aj@suse.de> [BZ #2510] * manual/search.texi (Hash Search Function): Clarify. (Array Search Function): Clarify. 2006-11-12 Joseph Myers <joseph@codesourcery.com> [BZ #2830] * math/atest-exp.c (main): Cast hex value to mp_limb_t before shifting. * math/atest-exp2.c (read_mpn_hex): Likewise. * math/atest-sincos.c (main): Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Add epoll_pwait. * sysdeps/unix/sysv/linux/sys/epoll.h: Declare epoll_pwait. * sysdeps/unix/sysv/linux/Versions (libc): Add epoll_pwait for version GLIBC_2.6. * Versions.def: Add GLIBC_2.6 for libc. * sysdeps/i386/i486/bits/atomic.h: Add catomic_* support. 2006-10-11 Jakub Jelinek <jakub@redhat.com> * malloc/malloc.c (_int_malloc): Remove unused any_larger variable. * nis/nis_defaults.c (__nis_default_access): Don't call getenv twice. * nis/nis_subr.c (nis_getnames): Use __secure_getenv instead of getenv. * sysdeps/generic/unsecvars.h: Add NIS_PATH. 2006-10-11 Ulrich Drepper <drepper@redhat.com> * include/atomic.c: Define catomic_* operations. * sysdeps/x86_64/bits/atomic.h: Likewise. Fix a few minor problems. * stdlib/cxa_finalize.c: Use catomic_* operations instead of atomic_*. * malloc/memusage.c: Likewise. * gmon/mcount.c: Likewise. * elf/dl-close.c: Likewise. * elf/dl-open.c: Likewise. * elf/dl-profile.c: Likewise. * elf/dl-sym.c: Likewise. * elf/dl-runtime.c: Likewise. * elf/dl-fptr.c: Likewise. * resolv/res_libc.c: Likewise. 2006-10-10 Roland McGrath <roland@frob.com> * sysdeps/mach/hurd/utimes.c: Use a union to avoid an improper cast. * sysdeps/mach/hurd/futimes.c: Likewise. * sysdeps/mach/hurd/lutimes.c: Likewise. 2006-10-09 Ulrich Drepper <drepper@redhat.com> Jakub Jelinek <jakub@redhat.com> Implement reference counting of scope records. * elf/dl-close.c (_dl_close): Remove all scopes from removed objects from the list in objects which remain. Always allocate new scope record. * elf/dl-open.c (dl_open_worker): When growing array for scopes, don't resize, allocate a new one. * elf/dl-runtime.c: Update reference counters before using a scope array. * elf/dl-sym.c: Likewise. * elf/dl-libc.c: Adjust for l_scope name change. * elf/dl-load.c: Likewise. * elf/dl-object.c: Likewise. * elf/rtld.c: Likewise. * include/link.h: Include <rtld-lowlevel.h>. Define struct r_scoperec. Replace r_scope with pointer to r_scoperec structure. Add l_scoperec_lock. * sysdeps/generic/ldsodefs.h: Include <rtld-lowlevel.h>. * sysdeps/generic/rtld-lowlevel.h: New file. * include/atomic.h: Rename atomic_and to atomic_and_val and atomic_or to atomic_or_val. Define new macros atomic_and and atomic_or which do not return values. * sysdeps/x86_64/bits/atomic.h: Define atomic_and and atomic_or. Various cleanups. * sysdeps/i386/i486/bits/atomic.h: Likewise. * po/sv.po: Update from translation team. 2006-10-07 Ulrich Drepper <drepper@redhat.com> * Versions.def: Add GLIBC_2.6 to libpthread. * include/shlib-compat.h (SHLIB_COMPAT): Expand parameters before use. (versioned_symbol): Likewise. (compat_symbol): Likewise. * po/tr.po: Update from translation team. * nis/Banner: Removed. It's been integral part forever and the author info is incomplete anyway. * libio/Banner: Likewise. 2006-10-06 Ulrich Drepper <drepper@redhat.com> * version.h (VERSION): Bump to 2.5.90 for new development tree.
2007-01-11 21:51:07 +00:00
dbg_log (_("Failed to drop capabilities"));
do_exit (EXIT_FAILURE, 0, _("cap_set_proc failed"));
}
return new_caps;
}
void
install_real_capabilities (cap_t new_caps)
{
/* If we have no capabilities there is nothing to do here. */
if (new_caps == NULL)
return;
if (cap_set_proc (new_caps))
{
cap_free (new_caps);
dbg_log (_("Failed to drop capabilities"));
do_exit (EXIT_FAILURE, 0, _("cap_set_proc failed"));
/* NOTREACHED */
}
cap_free (new_caps);
if (prctl (PR_SET_KEEPCAPS, 0) == -1)
{
dbg_log (_("Failed to unset keep-capabilities"));
do_exit (EXIT_FAILURE, errno, _("prctl(KEEPCAPS) failed"));
/* NOTREACHED */
}
}
# endif /* HAVE_LIBCAP */
#endif /* HAVE_LIBAUDIT */
/* Determine if we are running on an SELinux kernel. Set selinux_enabled
to the result. */
void
nscd_selinux_enabled (int *selinux_enabled)
{
*selinux_enabled = is_selinux_enabled ();
if (*selinux_enabled < 0)
{
dbg_log (_("Failed to determine if kernel supports SELinux"));
do_exit (EXIT_FAILURE, 0, NULL);
}
}
/* Create thread for AVC netlink notification. */
static void *
avc_create_thread (void (*run) (void))
{
int rc;
rc =
pthread_create (&avc_notify_thread, NULL, (void *(*) (void *)) run, NULL);
if (rc != 0)
do_exit (EXIT_FAILURE, rc, _("Failed to start AVC thread"));
return &avc_notify_thread;
}
/* Stop AVC netlink thread. */
static void
avc_stop_thread (void *thread)
{
pthread_cancel (*(pthread_t *) thread);
}
/* Allocate a new AVC lock. */
static void *
avc_alloc_lock (void)
{
pthread_mutex_t *avc_mutex;
avc_mutex = malloc (sizeof (pthread_mutex_t));
if (avc_mutex == NULL)
do_exit (EXIT_FAILURE, errno, _("Failed to create AVC lock"));
pthread_mutex_init (avc_mutex, NULL);
return avc_mutex;
}
/* Acquire an AVC lock. */
static void
avc_get_lock (void *lock)
{
pthread_mutex_lock (lock);
}
/* Release an AVC lock. */
static void
avc_release_lock (void *lock)
{
pthread_mutex_unlock (lock);
}
/* Free an AVC lock. */
static void
avc_free_lock (void *lock)
{
pthread_mutex_destroy (lock);
free (lock);
}
/* Initialize the user space access vector cache (AVC) for NSCD along with
log/thread/lock callbacks. */
void
nscd_avc_init (void)
{
avc_entry_ref_init (&aeref);
if (avc_init ("avc", NULL, &log_cb, &thread_cb, &lock_cb) < 0)
do_exit (EXIT_FAILURE, errno, _("Failed to start AVC"));
else
dbg_log (_("Access Vector Cache (AVC) started"));
#ifdef HAVE_LIBAUDIT
audit_init ();
#endif
}
/* Check the permission from the caller (via getpeercon) to nscd.
Returns 0 if access is allowed, 1 if denied, and -1 on error.
The SELinux policy, enablement, and permission bits are all dynamic and the
caching done by glibc is not entirely correct. This nscd support should be
rewritten to use selinux_check_permission. A rewrite is risky though and
requires some refactoring. Currently we use symbolic mappings instead of
compile time constants (which SELinux upstream says are going away), and we
use security_deny_unknown to determine what to do if selinux-policy* doesn't
have a definition for the the permission or object class we are looking
up. */
int
nscd_request_avc_has_perm (int fd, request_type req)
{
/* Initialize to NULL so we know what to free in case of failure. */
security_context_t scon = NULL;
security_context_t tcon = NULL;
security_id_t ssid = NULL;
security_id_t tsid = NULL;
int rc = -1;
security_class_t sc_nscd;
access_vector_t perm;
int avc_deny_unknown;
/* Check if SELinux denys or allows unknown object classes
and permissions. It is 0 if they are allowed, 1 if they
are not allowed and -1 on error. */
if ((avc_deny_unknown = security_deny_unknown ()) == -1)
dbg_log (_("Error querying policy for undefined object classes "
"or permissions."));
/* Get the security class for nscd. If this fails we will likely be
unable to do anything unless avc_deny_unknown is 0. */
sc_nscd = string_to_security_class ("nscd");
2014-05-07 12:08:57 +00:00
if (sc_nscd == 0 && avc_deny_unknown == 1)
dbg_log (_("Error getting security class for nscd."));
/* Convert permission to AVC bits. */
perm = string_to_av_perm (sc_nscd, perms[req]);
if (perm == 0 && avc_deny_unknown == 1)
dbg_log (_("Error translating permission name "
"\"%s\" to access vector bit."), perms[req]);
/* If the nscd security class was not found or perms were not
found and AVC does not deny unknown values then allow it. */
if ((sc_nscd == 0 || perm == 0) && avc_deny_unknown == 0)
return 0;
if (getpeercon (fd, &scon) < 0)
{
dbg_log (_("Error getting context of socket peer"));
goto out;
}
if (getcon (&tcon) < 0)
{
dbg_log (_("Error getting context of nscd"));
goto out;
}
if (avc_context_to_sid (scon, &ssid) < 0
|| avc_context_to_sid (tcon, &tsid) < 0)
{
dbg_log (_("Error getting sid from context"));
goto out;
}
/* The SELinux API for avc_has_perm conflates access denied and error into
the return code -1, while nscd_request_avs_has_perm has distinct error
(-1) and denied (1) return codes. We map the avc_has_perm access denied or
error into an access denied at the nscd interface level (we do accurately
report error for the getpeercon, getcon, and avc_context_to_sid interfaces
used above). */
rc = avc_has_perm (ssid, tsid, sc_nscd, perm, &aeref, NULL) < 0;
out:
if (scon)
freecon (scon);
if (tcon)
freecon (tcon);
if (ssid)
sidput (ssid);
if (tsid)
sidput (tsid);
return rc;
}
/* Wrapper to get AVC statistics. */
void
nscd_avc_cache_stats (struct avc_cache_stats *cstats)
{
avc_cache_stats (cstats);
}
/* Print the AVC statistics to stdout. */
void
nscd_avc_print_stats (struct avc_cache_stats *cstats)
{
printf (_("\nSELinux AVC Statistics:\n\n"
"%15u entry lookups\n"
"%15u entry hits\n"
"%15u entry misses\n"
"%15u entry discards\n"
"%15u CAV lookups\n"
"%15u CAV hits\n"
"%15u CAV probes\n"
"%15u CAV misses\n"),
cstats->entry_lookups, cstats->entry_hits, cstats->entry_misses,
cstats->entry_discards, cstats->cav_lookups, cstats->cav_hits,
cstats->cav_probes, cstats->cav_misses);
}
#endif /* HAVE_SELINUX */