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Siddhesh Poyarekar 8b9e9c3c0b tunables: Fix environment variable processing for setuid binaries (bz #21073)
Florian Weimer pointed out that we have three different kinds of
environment variables (and hence tunables):

1. Variables that are removed for setxid processes
2. Variables that are ignored in setxid processes but is passed on to
   child processes
3. Variables that are passed on to child processes all the time

Tunables currently only does (2) and (3) when it should be doing (1)
for MALLOC_CHECK_.  This patch enhances the is_secure flag in tunables
to an enum value that can specify which of the above three categories
the tunable (and its envvar alias) belongs to.

The default is for tunables to be in (1).  Hence, all of the malloc
tunables barring MALLOC_CHECK_ are explicitly specified to belong to
category (2).  There were discussions around abolishing category (2)
completely but we can do that as a separate exercise in 2.26.

Tested on x86_64 to verify that there are no regressions.

	[BZ #21073]
	* elf/dl-tunable-types.h (tunable_seclevel_t): New enum.
	* elf/dl-tunables.c (tunables_strdup): Remove.
	(get_next_env): Also return the previous envp.
	(parse_tunables): Erase tunables of category
	TUNABLES_SECLEVEL_SXID_ERASE.
	(maybe_enable_malloc_check): Make MALLOC_CHECK_
	TUNABLE_SECLEVEL_NONE if /etc/setuid-debug is accessible.
	(__tunables_init)[TUNABLES_FRONTEND ==
	TUNABLES_FRONTEND_valstring]: Update GLIBC_TUNABLES envvar
	after parsing.
	[TUNABLES_FRONTEND != TUNABLES_FRONTEND_valstring]: Erase
	tunable envvars of category TUNABLES_SECLEVEL_SXID_ERASE.
	* elf/dl-tunables.h (struct _tunable): Change member is_secure
	to security_level.
	* elf/dl-tunables.list: Add security_level annotations for all
	tunables.
	* scripts/gen-tunables.awk: Recognize and generate enum values
	for security_level.
	* elf/tst-env-setuid.c: New test case.
	* elf/tst-env-setuid-tunables: new test case.
	* elf/Makefile (tests-static): Add them.
2017-02-02 15:50:16 +05:30
argp Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
assert Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
benchtests Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bits Make endian-conversion macros always return correct types (bug 16458). 2017-01-11 15:28:08 +00:00
catgets Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
conform Fix missing test dependency 2017-02-01 17:40:56 +01:00
crypt Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
csu Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
ctype Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
debug Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
dirent Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
dlfcn Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
elf tunables: Fix environment variable processing for setuid binaries (bz #21073) 2017-02-02 15:50:16 +05:30
gmon Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gnulib Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
grp Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
gshadow Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hesiod Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
hurd Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
iconv Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
iconvdata Increase some test timeouts. 2017-01-05 17:39:38 +00:00
include Use fortify macros for b{zero,copy} along decl from strings.h 2017-01-05 15:54:13 -02:00
inet Make endian-conversion macros always return correct types (bug 16458). 2017-01-11 15:28:08 +00:00
intl Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
io Fix MIPS n32 lseek, lseek64 (bug 21019). 2017-01-02 23:09:25 +00:00
libidn Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
libio Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
locale Fix ld-address format-truncation error. 2017-01-11 13:59:01 +00:00
localedata Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
login Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
mach Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
malloc Increase some test timeouts. 2017-01-05 17:39:38 +00:00
manual Update install.texi latest GCC version known to work. 2017-01-18 17:27:47 +00:00
math Update README.libm-test. 2017-01-20 23:25:13 +00:00
mathvec Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
misc Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nis Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nptl Bug 20116: Fix use after free in pthread_create() 2017-01-28 19:21:44 -05:00
nptl_db Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
nscd Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
nss Increase some test timeouts. 2017-01-05 17:39:38 +00:00
po Add target to incorporate translations from translations.org 2017-01-20 12:32:46 +05:30
posix Update copyright dates not handled by scripts/update-copyrights. 2017-01-01 00:26:24 +00:00
pwd Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
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resource Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
rt Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
scripts tunables: Fix environment variable processing for setuid binaries (bz #21073) 2017-02-02 15:50:16 +05:30
setjmp Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
shadow Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
signal Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
socket Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
soft-fp * soft-fp/op-common.h (_FP_MUL, _FP_FMA, _FP_DIV): Add 2017-01-24 23:27:36 +01:00
stdio-common Fix testsuite build for GCC 7 -Wformat-truncation. 2017-01-11 14:02:23 +00:00
stdlib Fix environment traversal when an envvar value is empty 2017-01-20 00:45:09 +05:30
streams Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
string string/tst-strcoll-overflow: Do not accept timeout as test result 2017-01-25 16:27:03 +01:00
sunrpc Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
support Bug 20116: Fix use after free in pthread_create() 2017-01-28 19:21:44 -05:00
sysdeps alpha: Use saturating arithmetic in memchr 2017-02-01 14:39:04 -08:00
sysvipc Fix test-sysvsem on some platforms 2017-01-02 18:53:50 -02:00
termios Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
time Fix testsuite build for GCC 7 -Wformat-truncation. 2017-01-11 14:02:23 +00:00
timezone Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wcsmbs Fix testsuite build for GCC 7 -Wformat-truncation. 2017-01-11 14:02:23 +00:00
wctype Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
.gitattributes Assume __NR_openat is always defined 2016-03-23 23:35:08 +01:00
.gitignore Add *.pyc to .gitignore 2015-05-18 15:26:26 +05:30
abi-tags Add arm-nacl port. 2015-04-17 09:02:19 -07:00
aclocal.m4 Work even with compilers which enable -fstack-protector by default [BZ #7065] 2016-12-26 10:10:58 +01:00
BUGS
ChangeLog tunables: Fix environment variable processing for setuid binaries (bz #21073) 2017-02-02 15:50:16 +05:30
ChangeLog.1
ChangeLog.2
ChangeLog.3
ChangeLog.4
ChangeLog.5
ChangeLog.6 Revert "ChangeLogs: convert to utf-8" 2016-02-12 16:35:27 -05:00
ChangeLog.7 Revert "ChangeLogs: convert to utf-8" 2016-02-12 16:35:27 -05:00
ChangeLog.8 ChangeLog: change Winblowz to Windows 2016-08-10 00:49:28 +08:00
ChangeLog.9
ChangeLog.10 Revert "ChangeLogs: convert to utf-8" 2016-02-12 16:35:27 -05:00
ChangeLog.11 ChangeLog: change Winblowz to Windows 2016-08-10 00:49:28 +08:00
ChangeLog.12 Revert "ChangeLogs: convert to utf-8" 2016-02-12 16:35:27 -05:00
ChangeLog.13
ChangeLog.14 Revert "ChangeLogs: convert to utf-8" 2016-02-12 16:35:27 -05:00
ChangeLog.15
ChangeLog.16
ChangeLog.17
ChangeLog.old-ports
ChangeLog.old-ports-aarch64
ChangeLog.old-ports-aix
ChangeLog.old-ports-alpha
ChangeLog.old-ports-am33
ChangeLog.old-ports-arm
ChangeLog.old-ports-cris
ChangeLog.old-ports-hppa
ChangeLog.old-ports-ia64
ChangeLog.old-ports-linux-generic
ChangeLog.old-ports-m68k
ChangeLog.old-ports-microblaze
ChangeLog.old-ports-mips
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ChangeLog.old-ports-tile
config.h.in Add framework for tunables 2016-12-31 23:49:24 +05:30
config.make.in Initialize tunable list with the GLIBC_TUNABLES environment variable 2016-12-31 23:49:24 +05:30
configure Enhance --enable-tunables to select tunables frontend at build time 2016-12-31 23:49:24 +05:30
configure.ac Enhance --enable-tunables to select tunables frontend at build time 2016-12-31 23:49:24 +05:30
CONFORMANCE
COPYING
COPYING.LIB
cppflags-iterator.mk
extra-lib.mk support: Introduce new subdirectory for test infrastructure 2016-12-09 08:18:27 +01:00
extra-modules.mk Remove NOT_IN_libc 2014-11-24 15:03:45 +05:30
gen-locales.mk Split locale generation snippet into a separate file 2015-05-13 13:05:28 +05:30
INSTALL Update install.texi latest GCC version known to work. 2017-01-18 17:27:47 +00:00
libc-abis
LICENSES
Makeconfig Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile.in New make target to only build benchmark binaries 2016-04-20 10:23:28 +05:30
Makerules Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
NAMESPACE
NEWS Fix typo in NEWS 2017-01-14 16:37:41 +05:30
o-iterator.mk
README Require Linux 3.2 except on x86 / x86_64, 3.2 headers everywhere. 2016-02-24 17:15:12 +00:00
README.pretty-printers Fix mutex pretty printer test and pretty printer output. 2017-01-20 14:56:39 +01:00
README.tunables Add framework for tunables 2016-12-31 23:49:24 +05:30
Rules Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
shlib-versions This is update for configure, build and install of vector math library. 2015-05-14 18:07:06 +03:00
test-skeleton.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
version.h Open development for 2.25. 2016-08-01 23:00:21 -04:00
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