Florian Weimer 27a0c6b490 elf: Avoid re-initializing already allocated TLS in dlopen (bug 31717) ... The old code used l_init_called as an indicator for whether TLS initialization was complete. However, it is possible that TLS for an object is initialized, written to, and then dlopen for this object is called again, and l_init_called is not true at this point. Previously, this resulted in TLS being initialized twice, discarding any interim writes (technically introducing a use-after-free bug even). This commit introduces an explicit per-object flag, l_tls_in_slotinfo. It indicates whether _dl_add_to_slotinfo has been called for this object. This flag is used to avoid double-initialization of TLS. In update_tls_slotinfo, the first_static_tls micro-optimization is removed because preserving the initalization flag for subsequent use by the second loop for static TLS is a bit complicated, and another per-object flag does not seem to be worth it. Furthermore, the l_init_called flag is dropped from the second loop (for static TLS initialization) because l_need_tls_init on its own prevents double-initialization. The remaining l_init_called usage in resize_scopes and update_scopes is just an optimization due to the use of scope_has_map, so it is not changed in this commit. The isupper check ensures that libc.so.6 is TLS is not reverted. Such a revert happens if l_need_tls_init is not cleared in _dl_allocate_tls_init for the main_thread case, now that l_init_called is not checked anymore in update_tls_slotinfo in elf/dl-open.c. Reported-by: Jonathon Anderson <janderson@rice.edu> Reviewed-by: Carlos O'Donell <carlos@redhat.com> (cherry picked from commit 5097cd344f)		2024-09-09 21:31:28 +02:00
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arpa	Fix all the remaining misspellings -- BZ 25337	2023-06-02 01:39:48 +00:00
bits	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
gnu	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
net
netinet
programs	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
protocols
rpc
rpcsvc
sys	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
aio.h
aliases.h	Move 'aliases' routines from 'inet' into 'nss'	2023-10-24 12:30:59 +02:00
alloc_buffer.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
alloca.h
allocate_once.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
ar.h
argp-fmtstream.h
argp.h
argz.h
array_length.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
assert.h	assert: Do not use stderr in libc-internal assert	2022-08-03 11:43:04 +02:00
atomic_wide_counter.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
atomic.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
byteswap.h
clone_internal.h	posix: Add pidfd_spawn and pidfd_spawnp (BZ 30349)	2023-09-05 13:08:59 -03:00
complex.h
cpio.h
ctype.h
des.h
dirent.h
dlfcn.h	elf: Remove LD_PROFILE for static binaries	2023-11-21 16:15:42 -03:00
dso_handle.h
elf.h
endian.h
envz.h
err.h
errno.h
error.h	Mark various cold functions as __COLD	2023-05-01 19:33:21 +02:00
execinfo.h
fcntl.h
features-time64.h
features.h	version.h, include/features.h: Bump version to 2.39	2024-01-31 01:29:11 +01:00
fenv.h
file_change_detection.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
filename.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
float.h
fmtmsg.h
fnmatch.h
fpu_control.h
fstab.h
fts.h
ftw.h
gconv.h
getopt_int.h
getopt.h
glob.h
gmp.h	Apply asm redirection in gmp.h before first use	2022-11-07 10:40:21 -03:00
gnu-versions.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
grp-merge.h	Remove 'grp' and merge into 'nss' and 'posix'	2023-10-24 12:30:59 +02:00
grp.h	Remove 'grp' and merge into 'nss' and 'posix'	2023-10-24 12:30:59 +02:00
gshadow.h	Remove 'gshadow' and merge into 'nss'	2023-10-24 12:30:59 +02:00
iconv.h
idx.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
ifaddrs.h	nscd: Do not rebuild getaddrinfo (bug 30709)	2023-08-11 10:10:16 +02:00
ifreq.h
ifunc-impl-list.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
inline-hashtab.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
intprops.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
inttypes.h
langinfo.h
lastlog.h
libc-diag.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
libc-internal.h	Define __libc_initial for the static libc	2024-08-19 16:11:14 +02:00
libc-pointer-arith.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
libc-symbols.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
libgen.h
libintl.h
limits.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
link.h	elf: Avoid re-initializing already allocated TLS in dlopen (bug 31717)	2024-09-09 21:31:28 +02:00
list_t.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
list.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
locale.h
loop_unroll.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
malloc.h	Simplify __malloc_initialized	2021-07-22 18:38:04 +05:30
math-narrow-eval.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
math.h	Redirect fma calls to __fma in libm	2021-09-15 22:57:35 +00:00
mcheck.h	mcheck: Wean away from malloc hooks [BZ #23489]	2021-07-22 18:38:02 +05:30
memory.h
mntent.h
monetary.h
mqueue.h
netdb.h	Move 'netgroup' routines from 'inet' into 'nss'	2023-10-24 12:30:59 +02:00
netgroup.h	Move 'netgroup' routines from 'inet' into 'nss'	2023-10-24 12:30:59 +02:00
nl_types.h
nss_dns.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
nss_files.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
nss.h
nsswitch.h
obstack.h
plural-exp.h
poll.h
printf_buffer.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
printf.h	stdio-common: Convert vfprintf and related functions to buffers	2022-12-19 18:56:54 +01:00
pthread.h
pty.h
pwd.h	Remove 'pwd' and merge into 'nss'	2023-10-24 12:30:59 +02:00
random-bits.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
re_comp.h
regex.h	Fix regex type usage	2023-05-01 09:08:59 -04:00
regexp.h
register-atfork.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
resolv.h	resolv: Add internal __res_binary_hnok function	2022-08-30 10:02:49 +02:00
rounding-mode.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
rtld-malloc.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
sched.h
scratch_buffer.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
search.h
set-freeres.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
setjmp.h	chk: Add and fix hidden builtin definitions for *_chk	2023-08-03 22:46:48 +02:00
sgtty.h
shadow.h	Remove 'shadow' and merge into 'nss'	2023-10-24 12:30:59 +02:00
shlib-compat.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
shm-directory.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
signal.h	stdio: Remove the usage of $(fno-unit-at-a-time) for siglist.c	2022-05-13 10:54:41 -03:00
spawn.h
stab.h
stackinfo.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
stap-probe.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
stdbit.h	Implement C23 <stdbit.h>	2024-01-03 12:07:14 +00:00
stdc-predef.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
stdint.h
stdio_ext.h
stdio.h	stdio: Remove __libc_message alloca usage	2023-09-11 16:16:49 +00:00
stdlib.h	stdlib: Remove use of mergesort on qsort (BZ 21719)	2023-10-31 14:18:05 -03:00
string.h	chk: Add and fix hidden builtin definitions for *_chk	2023-08-03 22:46:48 +02:00
strings.h
struct___timeb64.h
struct___timespec64.h
struct___timeval64.h
stubs-prologue.h
syscall.h
sysexits.h
syslog.h
tar.h
termios.h
tgmath.h
time.h	Define in_int32_t_range to check if the 64 bit time_t syscall should be used	2022-11-17 14:35:13 -03:00
ttyent.h
uchar.h
ucontext.h
ulimit.h
unistd_ext.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
unistd.h	unistd: Avoid PLT entries with _FORTIFY_SOURCE	2023-07-05 16:59:48 +02:00
utime.h
utmp.h
values.h	Update copyright dates with scripts/update-copyrights	2024-01-01 10:53:40 -08:00
verify.h
wait.h
wchar.h	wchar: Avoid PLT entries with _FORTIFY_SOURCE	2023-07-05 16:59:48 +02:00
wctype.h
wordexp.h