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Date: Tue, 11 Feb 2020 11:11:21 -0700
From: shuah <shuah@...nel.org>
To: Kees Cook <keescook@...omium.org>, Ingo Molnar <mingo@...nel.org>
Cc: Hector Marco-Gisbert <hecmargi@....es>,
Catalin Marinas <catalin.marinas@....com>, Will Deacon
<will.deacon@....com>, Jason Gunthorpe <jgg@...lanox.com>,
Jann Horn <jannh@...gle.com>, Russell King <linux@...linux.org.uk>,
x86@...nel.org, kernel-hardening@...ts.openwall.com,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-kselftest@...r.kernel.org, shuah <shuah@...nel.org>
Subject: Re: [PATCH v3 7/7] selftests/exec: Add READ_IMPLIES_EXEC tests
On 2/10/20 12:30 PM, Kees Cook wrote:
> In order to check the matrix of possible states for handling
> READ_IMPLIES_EXEC across native, compat, and the state of PT_GNU_STACK,
> add tests for these execution conditions.
>
> Signed-off-by: Kees Cook <keescook@...omium.org>
No issues for this to go through tip.
A few problems to fix first. This fails to compile when 32-bit libraries
aren't installed. It should fail the 32-bit part and run other checks.
make kselftest TARGETS=exec
make --no-builtin-rules ARCH=x86 -C ../../.. headers_install
make[2]: Entering directory '/lkml/linux_5.6'
INSTALL ./usr/include
make[2]: Leaving directory '/lkml/linux_5.6'
make[2]: Entering directory '/lkml/linux_5.6/tools/testing/selftests/exec'
gcc -m32 -Wall -Wno-nonnull -D_GNU_SOURCE -Wl,-z,noexecstack -o
/lkml/linux_5.6/tools/testing/selftests/exec/rie-compat-nx-gnu-stack.new
read_implies_exec.c
readelf -Wl
/lkml/linux_5.6/tools/testing/selftests/exec/rie-compat-nx-gnu-stack.new
| grep GNU_STACK | grep -q 'RW ' && \
mv
/lkml/linux_5.6/tools/testing/selftests/exec/rie-compat-nx-gnu-stack.new
/lkml/linux_5.6/tools/testing/selftests/exec/rie-compat-nx-gnu-stack
In file included from /usr/lib/gcc/x86_64-linux-gnu/9/include/stdint.h:9,
from read_implies_exec.c:6:
/usr/include/stdint.h:26:10: fatal error: bits/libc-header-start.h: No
such file or directory
26 | #include <bits/libc-header-start.h>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
readelf: Error:
'/lkml/linux_5.6/tools/testing/selftests/exec/rie-compat-nx-gnu-stack.new':
No such file
make[2]: *** [Makefile:58:
/lkml/linux_5.6/tools/testing/selftests/exec/rie-compat-nx-gnu-stack]
Error 1
make[2]: Leaving directory '/lkml/linux_5.6/tools/testing/selftests/exec'
make[1]: *** [Makefile:150: all] Error 2
make: *** [Makefile:1217: kselftest] Error 2
thanks,
-- Shuah
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