From d3bf3cba97111334082b817e59ff2840dbc98afa Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Wed, 22 Mar 2023 13:34:55 -0700 Subject: [PATCH v2 07/15] x86/cet: Check legacy shadow stack code in .init_array section Verify that legacy shadow stack code in .init_array section in application and shared library, which are marked as shadow stack enabled, will trigger segfault. --- sysdeps/x86/Makefile | 36 +++++++++++++++ sysdeps/x86/tst-shstk-legacy-1d-static.c | 1 + sysdeps/x86/tst-shstk-legacy-1d.c | 47 ++++++++++++++++++++ sysdeps/x86/tst-shstk-legacy-1e-static.c | 1 + sysdeps/x86/tst-shstk-legacy-1e-static.sh | 32 ++++++++++++++ sysdeps/x86/tst-shstk-legacy-1e.c | 53 +++++++++++++++++++++++ sysdeps/x86/tst-shstk-legacy-1e.sh | 34 +++++++++++++++ sysdeps/x86/tst-shstk-legacy-1f.c | 29 +++++++++++++ sysdeps/x86/tst-shstk-legacy-1g.c | 35 +++++++++++++++ sysdeps/x86/tst-shstk-legacy-1g.sh | 34 +++++++++++++++ sysdeps/x86/tst-shstk-legacy-mod-1.c | 28 ++++++++++++ 11 files changed, 330 insertions(+) create mode 100644 sysdeps/x86/tst-shstk-legacy-1d-static.c create mode 100644 sysdeps/x86/tst-shstk-legacy-1d.c create mode 100644 sysdeps/x86/tst-shstk-legacy-1e-static.c create mode 100755 sysdeps/x86/tst-shstk-legacy-1e-static.sh create mode 100644 sysdeps/x86/tst-shstk-legacy-1e.c create mode 100755 sysdeps/x86/tst-shstk-legacy-1e.sh create mode 100644 sysdeps/x86/tst-shstk-legacy-1f.c create mode 100644 sysdeps/x86/tst-shstk-legacy-1g.c create mode 100755 sysdeps/x86/tst-shstk-legacy-1g.sh create mode 100644 sysdeps/x86/tst-shstk-legacy-mod-1.c diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile index 5f1414fba3..b8b98177e0 100644 --- a/sysdeps/x86/Makefile +++ b/sysdeps/x86/Makefile @@ -139,11 +139,22 @@ tests += \ tst-shstk-legacy-1b-static \ tst-shstk-legacy-1c \ tst-shstk-legacy-1c-static \ + tst-shstk-legacy-1d \ + tst-shstk-legacy-1d-static \ + tst-shstk-legacy-1e \ + tst-shstk-legacy-1e-static \ + tst-shstk-legacy-1f \ + tst-shstk-legacy-1g \ # tests +modules-names += \ + tst-shstk-legacy-mod-1 \ +# modules-names tests-static += \ tst-shstk-legacy-1a-static \ tst-shstk-legacy-1b-static \ tst-shstk-legacy-1c-static \ + tst-shstk-legacy-1d-static \ + tst-shstk-legacy-1e-static \ # tests-static extra-objs += \ tst-shstk-legacy-1-extra.o \ @@ -192,6 +203,9 @@ CFLAGS-tst-cet-legacy-10a-static.c += -fcf-protection=none CFLAGS-tst-shstk-legacy-1a.c += -fcf-protection=none CFLAGS-tst-shstk-legacy-1a-static.c += -fcf-protection=none +CFLAGS-tst-shstk-legacy-1d.c += -fcf-protection=none +CFLAGS-tst-shstk-legacy-1d-static.c += -fcf-protection=none +CFLAGS-tst-shstk-legacy-1f.c += -fcf-protection=none $(objpfx)tst-cet-legacy-1: $(objpfx)tst-cet-legacy-mod-1.so \ $(objpfx)tst-cet-legacy-mod-2.so @@ -234,6 +248,28 @@ tst-shstk-legacy-1c-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK tst-shstk-legacy-1c-static-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK $(objpfx)tst-shstk-legacy-1c: $(objpfx)tst-shstk-legacy-1-extra.o $(objpfx)tst-shstk-legacy-1c-static: $(objpfx)tst-shstk-legacy-1-extra.o +$(objpfx)tst-shstk-legacy-1d: $(objpfx)tst-shstk-legacy-1-extra.o +$(objpfx)tst-shstk-legacy-1d-static: $(objpfx)tst-shstk-legacy-1-extra.o +$(objpfx)tst-shstk-legacy-1e: $(objpfx)tst-shstk-legacy-1-extra.o +$(objpfx)tst-shstk-legacy-1e-static: $(objpfx)tst-shstk-legacy-1-extra.o +$(objpfx)tst-shstk-legacy-1e.out: \ + $(..)/sysdeps/x86/tst-shstk-legacy-1e.sh $(objpfx)tst-shstk-legacy-1e + $(SHELL) $< $(common-objpfx) '$(test-program-prefix)' 2> $@; \ + $(evaluate-test) +$(objpfx)tst-shstk-legacy-1e-static.out: \ + $(..)/sysdeps/x86/tst-shstk-legacy-1e-static.sh \ + $(objpfx)tst-shstk-legacy-1e-static + $(SHELL) $< $(common-objpfx) 2> $@; \ + $(evaluate-test) +$(objpfx)tst-shstk-legacy-1f: $(objpfx)tst-shstk-legacy-mod-1.so +$(objpfx)tst-shstk-legacy-mod-1.so: \ + $(objpfx)tst-shstk-legacy-mod-1.os \ + $(objpfx)tst-shstk-legacy-1-extra.os +$(objpfx)tst-shstk-legacy-1g: $(objpfx)tst-shstk-legacy-mod-1.so +$(objpfx)tst-shstk-legacy-1g.out: \ + $(..)/sysdeps/x86/tst-shstk-legacy-1g.sh $(objpfx)tst-shstk-legacy-1g + $(SHELL) $< $(common-objpfx) '$(test-program-prefix)' 2> $@; \ + $(evaluate-test) endif # Add -fcf-protection to CFLAGS when CET is enabled. diff --git a/sysdeps/x86/tst-shstk-legacy-1d-static.c b/sysdeps/x86/tst-shstk-legacy-1d-static.c new file mode 100644 index 0000000000..dca27a5482 --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1d-static.c @@ -0,0 +1 @@ +#include "tst-shstk-legacy-1d.c" diff --git a/sysdeps/x86/tst-shstk-legacy-1d.c b/sysdeps/x86/tst-shstk-legacy-1d.c new file mode 100644 index 0000000000..465cfab1db --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1d.c @@ -0,0 +1,47 @@ +/* Check that legacy shadow stack code in init_array won't trigger + segfault. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include +#include + +/* Check that legacy shadow stack code in init_array won't trigger + segfault. */ +extern void legacy (void); +int done; + +void +legacy_1 (void) +{ + legacy (); + done = 1; +} + +void (*init_array []) (void) + __attribute__ ((section (".init_array"), aligned (sizeof (void *)))) = +{ + &legacy_1 +}; + +static int +do_test (void) +{ + return EXIT_SUCCESS; +} + +#include diff --git a/sysdeps/x86/tst-shstk-legacy-1e-static.c b/sysdeps/x86/tst-shstk-legacy-1e-static.c new file mode 100644 index 0000000000..cb6ce0de00 --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1e-static.c @@ -0,0 +1 @@ +#include "tst-shstk-legacy-1e.c" diff --git a/sysdeps/x86/tst-shstk-legacy-1e-static.sh b/sysdeps/x86/tst-shstk-legacy-1e-static.sh new file mode 100755 index 0000000000..e943aec70e --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1e-static.sh @@ -0,0 +1,32 @@ +#!/bin/sh +# Check that legacy shadow stack code in init_array will trigger +# segfault. +# Copyright (C) 2023 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# 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 +# . + +common_objpfx=$1; shift + +${common_objpfx}elf/tst-shstk-legacy-1e-static +# The exit status should only be unsupported (77) or segfault (139). +status=$? +if test $status -eq 77; then + exit 77 +elif test $status == 139; then + exit 0 +else + exit 1 +fi diff --git a/sysdeps/x86/tst-shstk-legacy-1e.c b/sysdeps/x86/tst-shstk-legacy-1e.c new file mode 100644 index 0000000000..e78a4b776e --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1e.c @@ -0,0 +1,53 @@ +/* Check that legacy shadow stack code in init_array will trigger + segfault. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include +#include +#include +#include + +/* Check that legacy shadow stack code in init_array will trigger + segfault. */ +extern void legacy (void); +int done; + +void +legacy_1 (void) +{ + legacy (); + done = 1; +} + +void (*init_array []) (void) + __attribute__ ((section (".init_array"), aligned (sizeof (void *)))) = +{ + &legacy_1 +}; + +static int +do_test (void) +{ + if (!CPU_FEATURE_ACTIVE (SHSTK)) + return EXIT_UNSUPPORTED; + + return EXIT_FAILURE; +} + +#define EXPECTED_SIGNAL (CPU_FEATURE_ACTIVE (SHSTK) ? SIGSEGV : 0) +#include diff --git a/sysdeps/x86/tst-shstk-legacy-1e.sh b/sysdeps/x86/tst-shstk-legacy-1e.sh new file mode 100755 index 0000000000..b0467aa899 --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1e.sh @@ -0,0 +1,34 @@ +#!/bin/sh +# Check that legacy shadow stack code in init_array will trigger +# segfault. +# Copyright (C) 2023 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# 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 +# . + +common_objpfx=$1; shift +test_program_prefix=$1; shift + +${test_program_prefix} \ + ${common_objpfx}elf/tst-shstk-legacy-1e +# The exit status should only be unsupported (77) or segfault (139). +status=$? +if test $status -eq 77; then + exit 77 +elif test $status == 139; then + exit 0 +else + exit 1 +fi diff --git a/sysdeps/x86/tst-shstk-legacy-1f.c b/sysdeps/x86/tst-shstk-legacy-1f.c new file mode 100644 index 0000000000..27e01a229e --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1f.c @@ -0,0 +1,29 @@ +/* Check that legacy shadow stack code in init_array won't trigger + segfault. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include +#include + +static int +do_test (void) +{ + return EXIT_SUCCESS; +} + +#include diff --git a/sysdeps/x86/tst-shstk-legacy-1g.c b/sysdeps/x86/tst-shstk-legacy-1g.c new file mode 100644 index 0000000000..a1f3d242e9 --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1g.c @@ -0,0 +1,35 @@ +/* Check that legacy shadow stack code in init_array will trigger + segfault. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include +#include +#include +#include + +static int +do_test (void) +{ + if (!CPU_FEATURE_ACTIVE (SHSTK)) + return EXIT_UNSUPPORTED; + + return EXIT_FAILURE; +} + +#define EXPECTED_SIGNAL (CPU_FEATURE_ACTIVE (SHSTK) ? SIGSEGV : 0) +#include diff --git a/sysdeps/x86/tst-shstk-legacy-1g.sh b/sysdeps/x86/tst-shstk-legacy-1g.sh new file mode 100755 index 0000000000..c112bf6d8d --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-1g.sh @@ -0,0 +1,34 @@ +#!/bin/sh +# Check that legacy shadow stack code in init_array will trigger +# segfault. +# Copyright (C) 2023 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# 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 +# . + +common_objpfx=$1; shift +test_program_prefix=$1; shift + +${test_program_prefix} \ + ${common_objpfx}elf/tst-shstk-legacy-1g +# The exit status should only be unsupported (77) or segfault (139). +status=$? +if test $status -eq 77; then + exit 77 +elif test $status == 139; then + exit 0 +else + exit 1 +fi diff --git a/sysdeps/x86/tst-shstk-legacy-mod-1.c b/sysdeps/x86/tst-shstk-legacy-mod-1.c new file mode 100644 index 0000000000..b75b5484d9 --- /dev/null +++ b/sysdeps/x86/tst-shstk-legacy-mod-1.c @@ -0,0 +1,28 @@ +/* Check legacy shadow stack code in init_array. + Copyright (C) 2023 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include + +/* Check legacy shadow stack code in init_array. */ +extern void legacy (void) __attribute__ ((visibility ("hidden"))); + +void (*init_array []) (void) + __attribute__ ((section (".init_array"), aligned (sizeof (void *)))) = +{ + &legacy +}; -- 2.40.1