[PATCH v9 3/3] elf: Add a test for PT_LOAD segments with invalid p_align [BZ #28688]

[Adhemerval Zanella]

On 21/01/2022 18:12, H.J. Lu wrote:
> Build tst-p_alignmod3.so with 256 byte page size and verify that it is
> rejected with a proper error message.


LGTM, thanks.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

> ---
>  elf/Makefile          |  9 +++++++++
>  elf/tst-p_align3.c    | 27 +++++++++++++++++++++++++++
>  elf/tst-p_align3.sh   | 27 +++++++++++++++++++++++++++
>  elf/tst-p_alignmod3.c | 25 +++++++++++++++++++++++++
>  4 files changed, 88 insertions(+)
>  create mode 100644 elf/tst-p_align3.c
>  create mode 100755 elf/tst-p_align3.sh
>  create mode 100644 elf/tst-p_alignmod3.c
> 
> diff --git a/elf/Makefile b/elf/Makefile
> index c63abab44b..ad1c0ea7b6 100644
> --- a/elf/Makefile
> +++ b/elf/Makefile
> @@ -416,6 +416,7 @@ tests += \
>    tst-p_alignmod2-edit \
>    tst-p_align1 \
>    tst-p_align2 \
> +  tst-p_align3 \
>    tst-relsort1 \
>    tst-ro-dynamic \
>    tst-rtld-run-static \
> @@ -733,6 +734,7 @@ modules-names = \
>    tst-nodelete-opened-lib \
>    tst-null-argv-lib \
>    tst-p_alignmod-base \
> +  tst-p_alignmod3 \
>    tst-relsort1mod1 \
>    tst-relsort1mod2 \
>    tst-ro-dynamic-mod \
> @@ -2608,3 +2610,10 @@ $(objpfx)tst-p_alignmod2.so: $(objpfx)tst-p_alignmod2-edit \
>  	cp $(objpfx)tst-p_alignmod-base.so $@
>  	$(test-wrapper-env) $(run-program-env) $(rtld-prefix) \
>  	  $(objpfx)tst-p_alignmod2-edit $@
> +
> +LDFLAGS-tst-p_alignmod3.so += -Wl,-z,max-page-size=0x100,-z,common-page-size=0x100
> +
> +$(objpfx)tst-p_align3: $(objpfx)tst-p_alignmod3.so
> +$(objpfx)tst-p_align3.out: tst-p_align3.sh $(objpfx)tst-p_align3
> +	$(SHELL) $< $(common-objpfx) '$(test-program-prefix)'; \
> +	$(evaluate-test)
> diff --git a/elf/tst-p_align3.c b/elf/tst-p_align3.c
> new file mode 100644
> index 0000000000..8be9f311bd
> --- /dev/null
> +++ b/elf/tst-p_align3.c
> @@ -0,0 +1,27 @@
> +/* Check invalid p_align of PT_LOAD segments in a shared library.
> +   Copyright (C) 2022 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
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#include "tst-p_align.h"
> +
> +static int
> +do_test (void)
> +{
> +  return do_load_test ();
> +}
> +
> +#include <support/test-driver.c>
> diff --git a/elf/tst-p_align3.sh b/elf/tst-p_align3.sh
> new file mode 100755
> index 0000000000..688c4b34cc
> --- /dev/null
> +++ b/elf/tst-p_align3.sh
> @@ -0,0 +1,27 @@
> +#!/bin/sh
> +# Check invalid p_align of PT_LOAD segments in a shared library.
> +# Copyright (C) 2022 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
> +# <https://www.gnu.org/licenses/>.
> +
> +common_objpfx=$1; shift
> +test_program_prefix=$1; shift
> +
> +${test_program_prefix} \
> +  ${common_objpfx}elf/tst-p_align3 \
> +    2> ${common_objpfx}elf/tst-p_align3.out
> +test $? -ne 127 && exit 1
> +grep "ELF load command address/offset not page-aligned" ${common_objpfx}elf/tst-p_align3.out
> diff --git a/elf/tst-p_alignmod3.c b/elf/tst-p_alignmod3.c
> new file mode 100644
> index 0000000000..c15de3d6f2
> --- /dev/null
> +++ b/elf/tst-p_alignmod3.c
> @@ -0,0 +1,25 @@
> +/* Check invalid p_align of PT_LOAD segment in a shared library.
> +   Copyright (C) 2022 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
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#include "tst-p_align.h"
> +
> +int
> +do_load_test (void)
> +{
> +  return 0;
> +}