forked from rpms/glibc
198 lines
6.1 KiB
Diff
198 lines
6.1 KiB
Diff
commit be9240c84c67de44959905a829141576965a0588
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Author: Fangrui Song <maskray@google.com>
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Date: Tue Apr 19 15:52:27 2022 -0700
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elf: Remove __libc_init_secure
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After 73fc4e28b9464f0e13edc719a5372839970e7ddb,
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__libc_enable_secure_decided is always 0 and a statically linked
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executable may overwrite __libc_enable_secure without considering
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AT_SECURE.
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The __libc_enable_secure has been correctly initialized in _dl_aux_init,
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so just remove __libc_enable_secure_decided and __libc_init_secure.
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This allows us to remove some startup_get*id functions from
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22b79ed7f413cd980a7af0cf258da5bf82b6d5e5.
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Reviewed-by: Florian Weimer <fweimer@redhat.com>
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(cherry picked from commit 3e9acce8c50883b6cd8a3fb653363d9fa21e1608)
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diff --git a/csu/libc-start.c b/csu/libc-start.c
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index d01e57ea59ceb880..a2fc2f6f9665a48f 100644
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--- a/csu/libc-start.c
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+++ b/csu/libc-start.c
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@@ -285,9 +285,6 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
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}
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}
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- /* Initialize very early so that tunables can use it. */
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- __libc_init_secure ();
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-
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__tunables_init (__environ);
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ARCH_INIT_CPU_FEATURES ();
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diff --git a/elf/enbl-secure.c b/elf/enbl-secure.c
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index 9e47526bd3e444e1..1208610bd0670c74 100644
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--- a/elf/enbl-secure.c
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+++ b/elf/enbl-secure.c
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@@ -26,15 +26,5 @@
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#include <startup.h>
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#include <libc-internal.h>
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-/* If nonzero __libc_enable_secure is already set. */
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-int __libc_enable_secure_decided;
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/* Safest assumption, if somehow the initializer isn't run. */
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int __libc_enable_secure = 1;
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-
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-void
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-__libc_init_secure (void)
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-{
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- if (__libc_enable_secure_decided == 0)
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- __libc_enable_secure = (startup_geteuid () != startup_getuid ()
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- || startup_getegid () != startup_getgid ());
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-}
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diff --git a/include/libc-internal.h b/include/libc-internal.h
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index 749dfb919ce4a62d..44fcb6bdf8751c1c 100644
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--- a/include/libc-internal.h
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+++ b/include/libc-internal.h
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@@ -21,9 +21,6 @@
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#include <hp-timing.h>
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-/* Initialize the `__libc_enable_secure' flag. */
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-extern void __libc_init_secure (void);
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-
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/* Discover the tick frequency of the machine if something goes wrong,
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we return 0, an impossible hertz. */
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extern int __profile_frequency (void);
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diff --git a/include/unistd.h b/include/unistd.h
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index 7849562c4272e2c9..5824485629793ccb 100644
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--- a/include/unistd.h
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+++ b/include/unistd.h
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@@ -180,7 +180,6 @@ libc_hidden_proto (__sbrk)
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and some functions contained in the C library ignore various
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environment variables that normally affect them. */
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extern int __libc_enable_secure attribute_relro;
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-extern int __libc_enable_secure_decided;
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rtld_hidden_proto (__libc_enable_secure)
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diff --git a/sysdeps/generic/startup.h b/sysdeps/generic/startup.h
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index 04f20cde474cea89..c3be5430bd8bbaa6 100644
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--- a/sysdeps/generic/startup.h
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+++ b/sysdeps/generic/startup.h
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@@ -23,27 +23,3 @@
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/* Use macro instead of inline function to avoid including <stdio.h>. */
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#define _startup_fatal(message) __libc_fatal ((message))
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-
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-static inline uid_t
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-startup_getuid (void)
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-{
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- return __getuid ();
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-}
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-
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-static inline uid_t
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-startup_geteuid (void)
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-{
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- return __geteuid ();
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-}
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-
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-static inline gid_t
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-startup_getgid (void)
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-{
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- return __getgid ();
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-}
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-
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-static inline gid_t
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-startup_getegid (void)
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-{
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- return __getegid ();
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-}
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diff --git a/sysdeps/mach/hurd/enbl-secure.c b/sysdeps/mach/hurd/enbl-secure.c
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deleted file mode 100644
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index 3e9a6b888d56754b..0000000000000000
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--- a/sysdeps/mach/hurd/enbl-secure.c
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+++ /dev/null
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@@ -1,30 +0,0 @@
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-/* Define and initialize the `__libc_enable_secure' flag. Hurd version.
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- Copyright (C) 1998-2021 Free Software Foundation, Inc.
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- This file is part of the GNU C Library.
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-
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- The GNU C Library is free software; you can redistribute it and/or
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- modify it under the terms of the GNU Lesser General Public
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- License as published by the Free Software Foundation; either
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- version 2.1 of the License, or (at your option) any later version.
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-
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- The GNU C Library is distributed in the hope that it will be useful,
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- but WITHOUT ANY WARRANTY; without even the implied warranty of
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- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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- Lesser General Public License for more details.
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-
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- You should have received a copy of the GNU Lesser General Public
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- License along with the GNU C Library; if not, see
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- <https://www.gnu.org/licenses/>. */
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-
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-/* There is no need for this file in the Hurd; it is just a placeholder
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- to prevent inclusion of the sysdeps/generic version.
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- In the shared library, the `__libc_enable_secure' variable is defined
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- by the dynamic linker in dl-sysdep.c and set there.
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- In the static library, it is defined in init-first.c and set there. */
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-
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-#include <libc-internal.h>
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-
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-void
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-__libc_init_secure (void)
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-{
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-}
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diff --git a/sysdeps/mach/hurd/i386/init-first.c b/sysdeps/mach/hurd/i386/init-first.c
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index a430aae085527163..4dc9017ec8754a1a 100644
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--- a/sysdeps/mach/hurd/i386/init-first.c
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+++ b/sysdeps/mach/hurd/i386/init-first.c
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@@ -38,10 +38,6 @@ extern void __init_misc (int, char **, char **);
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unsigned long int __hurd_threadvar_stack_offset;
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unsigned long int __hurd_threadvar_stack_mask;
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-#ifndef SHARED
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-int __libc_enable_secure;
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-#endif
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-
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extern int __libc_argc attribute_hidden;
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extern char **__libc_argv attribute_hidden;
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extern char **_dl_argv;
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diff --git a/sysdeps/unix/sysv/linux/i386/startup.h b/sysdeps/unix/sysv/linux/i386/startup.h
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index dee7a4f1d3d420be..192c765361c17ed1 100644
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--- a/sysdeps/unix/sysv/linux/i386/startup.h
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+++ b/sysdeps/unix/sysv/linux/i386/startup.h
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@@ -32,30 +32,6 @@ _startup_fatal (const char *message __attribute__ ((unused)))
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ABORT_INSTRUCTION;
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__builtin_unreachable ();
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}
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-
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-static inline uid_t
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-startup_getuid (void)
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-{
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- return (uid_t) INTERNAL_SYSCALL_CALL (getuid32);
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-}
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-
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-static inline uid_t
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-startup_geteuid (void)
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-{
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- return (uid_t) INTERNAL_SYSCALL_CALL (geteuid32);
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-}
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-
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-static inline gid_t
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-startup_getgid (void)
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-{
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- return (gid_t) INTERNAL_SYSCALL_CALL (getgid32);
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-}
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-
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-static inline gid_t
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-startup_getegid (void)
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-{
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- return (gid_t) INTERNAL_SYSCALL_CALL (getegid32);
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-}
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#else
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# include_next <startup.h>
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#endif
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