kernel.git/tools/testing/selftests/x86, branch linux-4.15.y

selftests/x86/ptrace_syscall: Fix for yet more glibc interference

2018-03-28T16:23:02Z

commit 4b0b37d4cc54b21a6ecad7271cbc850555869c62 upstream. glibc keeps getting cleverer, and my version now turns raise() into more than one syscall. Since the test relies on ptrace seeing an exact set of syscalls, this breaks the test. Replace raise(SIGSTOP) with syscall(SYS_tgkill, ...) to force glibc to get out of our way. Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/bc80338b453afa187bc5f895bd8e2c8d6e264da2.1521300271.git.luto@kernel.org Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86/entry_from_vm86: Add test cases for POPF

2018-03-21T11:05:42Z

commit 78393fdde2a456cafa414b171c90f26a3df98b20 upstream. POPF is currently broken -- add tests to catch the error. This results in: [RUN] POPF with VIP set and IF clear from vm86 mode [INFO] Exited vm86 mode due to STI [FAIL] Incorrect return reason (started at eip = 0xd, ended at eip = 0xf) because POPF currently fails to check IF before reporting a pending interrupt. This patch also makes the FAIL message a bit more informative. Reported-by: Bart Oldeman Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stas Sergeev Cc: Thomas Gleixner Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/a16270b5cfe7832d6d00c479d0f871066cbdb52b.1521003603.git.luto@kernel.org Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86/entry_from_vm86: Exit with 1 if we fail

2018-03-21T11:05:42Z

commit 327d53d005ca47b10eae940616ed11c569f75a9b upstream. Fix a logic error that caused the test to exit with 0 even if test cases failed. Signed-off-by: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stas Sergeev Cc: Thomas Gleixner Cc: bartoldeman@gmail.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/b1cc37144038958a469c8f70a5f47a6a5638636a.1521003603.git.luto@kernel.org Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86/mpx: Fix incorrect bounds with old _sigfault

2018-02-22T14:40:02Z

commit 961888b1d76d84efc66a8f5604b06ac12ac2f978 upstream. For distributions with old userspace header files, the _sigfault structure is different. mpx-mini-test fails with the following error: [root@Purley]# mpx-mini-test_64 tabletest XSAVE is supported by HW & OS XSAVE processor supported state mask: 0x2ff XSAVE OS supported state mask: 0x2ff BNDREGS: size: 64 user: 1 supervisor: 0 aligned: 0 BNDCSR: size: 64 user: 1 supervisor: 0 aligned: 0 starting mpx bounds table test ERROR: siginfo bounds do not match shadow bounds for register 0 Fix it by using the correct offset of _lower/_upper in _sigfault. RHEL needs this patch to work. Signed-off-by: Rui Wang Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: dave.hansen@linux.intel.com Fixes: e754aedc26ef ("x86/mpx, selftests: Add MPX self test") Link: http://lkml.kernel.org/r/1513586050-1641-1-git-send-email-rui.y.wang@intel.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86: Disable tests requiring 32-bit support on pure 64-bit systems

2018-02-22T14:40:01Z

commit 9279ddf23ce78ff2676e8e8e19fec0f022c26d04 upstream. The ldt_gdt and ptrace_syscall selftests, even in their 64-bit variant, use hard-coded 32-bit syscall numbers and call "int $0x80". This will fail on 64-bit systems with CONFIG_IA32_EMULATION=y disabled. Therefore, do not build these tests if we cannot build 32-bit binaries (which should be a good approximation for CONFIG_IA32_EMULATION=y being enabled). Signed-off-by: Dominik Brodowski Cc: Andy Lutomirski Cc: Dmitry Safonov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-6-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86: Do not rely on "int $0x80" in single_step_syscall.c

2018-02-22T14:40:01Z

commit 4105c69703cdeba76f384b901712c9397b04e9c2 upstream. On 64-bit builds, we should not rely on "int $0x80" working (it only does if CONFIG_IA32_EMULATION=y is enabled). To keep the "Set TF and check int80" test running on 64-bit installs with CONFIG_IA32_EMULATION=y enabled, build this test only if we can also build 32-bit binaries (which should be a good approximation for that). Signed-off-by: Dominik Brodowski Cc: Andy Lutomirski Cc: Dmitry Safonov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-5-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86: Do not rely on "int $0x80" in test_mremap_vdso.c

2018-02-22T14:40:01Z

commit 2cbc0d66de0480449c75636f55697c7ff3af61fc upstream. On 64-bit builds, we should not rely on "int $0x80" working (it only does if CONFIG_IA32_EMULATION=y is enabled). Without this patch, the move test may succeed, but the "int $0x80" causes a segfault, resulting in a false negative output of this self-test. Signed-off-by: Dominik Brodowski Cc: Andy Lutomirski Cc: Dmitry Safonov Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211111013.16888-4-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86: Fix build bug caused by the 5lvl test which has been moved to the VM directory

2018-02-22T14:40:01Z

commit 7f95122067ab26fb8344b2a9de64ffbd0fea0010 upstream. Signed-off-by: Dominik Brodowski Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Fixes: 235266b8e11c "selftests/vm: move 128TB mmap boundary test to generic directory" Link: http://lkml.kernel.org/r/20180211111013.16888-2-linux@dominikbrodowski.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86/pkeys: Remove unused functions

2018-02-22T14:40:01Z

commit ce676638fe7b284132a7d7d5e7e7ad81bab9947e upstream. This also gets rid of two build warnings: protection_keys.c: In function ‘dumpit’: protection_keys.c:419:3: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result] write(1, buf, nr_read); ^~~~~~~~~~~~~~~~~~~~~~ Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Dave Hansen Cc: Shuah Khan Cc: Andy Lutomirski Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

selftests/x86: Clean up and document sscanf() usage

2018-02-22T14:40:01Z

commit d8e92de8ef952bed88c56c7a44c02d8dcae0984e upstream. Replace a couple of magically connected buffer length literal constants with a common definition that makes their relationship obvious. Also document why our sscanf() usage is safe. No intended functional changes. Suggested-by: Ingo Molnar Signed-off-by: Dominik Brodowski Cc: Andrew Lutomirski Cc: Andy Lutomirski Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-kselftest@vger.kernel.org Cc: shuah@kernel.org Link: http://lkml.kernel.org/r/20180211205924.GA23210@light.dominikbrodowski.net Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman