From: Ilya Leoshkevich <iii@linux.ibm.com>
To: Alexander Potapenko <glider@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Lameter <cl@linux.com>,
David Rientjes <rientjes@google.com>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
Marco Elver <elver@google.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Pekka Enberg <penberg@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Vasily Gorbik <gor@linux.ibm.com>,
Vlastimil Babka <vbabka@suse.cz>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Dmitry Vyukov <dvyukov@google.com>,
Hyeonggon Yoo <42.hyeyoo@gmail.com>,
kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-s390@vger.kernel.org,
linux-trace-kernel@vger.kernel.org,
Mark Rutland <mark.rutland@arm.com>,
Roman Gushchin <roman.gushchin@linux.dev>,
Sven Schnelle <svens@linux.ibm.com>
Subject: Re: [PATCH 00/32] kmsan: Enable on s390
Date: Thu, 16 Nov 2023 11:13:39 +0100 [thread overview]
Message-ID: <7c222eff6c1baaa7647a9aa43a1ef19de9670230.camel@linux.ibm.com> (raw)
In-Reply-To: <CAG_fn=U+X=EE9SSb61E=QDReBXn6PGiX4gJnMfNKsTwQ6saKcA@mail.gmail.com>
On Thu, 2023-11-16 at 09:42 +0100, Alexander Potapenko wrote:
> On Wed, Nov 15, 2023 at 9:34 PM Ilya Leoshkevich <iii@linux.ibm.com>
> wrote:
> >
> > Hi,
> >
> > This series provides the minimal support for Kernel Memory
> > Sanitizer on
> > s390. Kernel Memory Sanitizer is clang-only instrumentation for
> > finding
> > accesses to uninitialized memory. The clang support for s390 has
> > already
> > been merged [1].
> >
> > With this series, I can successfully boot s390 defconfig and
> > debug_defconfig with kmsan.panic=1. The tool found one real
> > s390-specific bug (fixed in master).
> >
> > Best regards,
> > Ilya
>
> Hi Ilya,
>
> This is really impressive!
> Can you please share some instructions on how to run KMSAN in QEMU?
> I've never touched s390, but I'm assuming it should be possible?
I developed this natively (without cross-compilation or emulation,
just KVM), but I just gave the following a try on x86_64 and had some
success:
$ make LLVM=1 ARCH=s390 O=../linux-build-s390x-cross CC=clang-18
LD=s390x-linux-gnu-ld OBJCOPY=s390x-linux-gnu-objcopy debug_defconfig
$ make LLVM=1 ARCH=s390 O=../linux-build-s390x-cross CC=clang-18
LD=s390x-linux-gnu-ld OBJCOPY=s390x-linux-gnu-objcopy menuconfig
$ make LLVM=1 ARCH=s390 O=../linux-build-s390x-cross CC=clang-18
LD=s390x-linux-gnu-ld OBJCOPY=s390x-linux-gnu-objcopy -j24
$ qemu-system-s390x -M accel=tcg -smp 2 -m 4G -kernel ../linux-build-
s390x-cross/arch/s390/boot/bzImage -nographic -append 'root=/dev/vda1
rw console=ttyS1 nokaslr earlyprintk cio_ignore=all kmsan.panic=1' -
object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-
ccw,rng=rng0
It's also possible to get a free s390 machine at [1].
[1] https://linuxone.cloud.marist.edu/oss
next prev parent reply other threads:[~2023-11-16 10:14 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-15 20:30 [PATCH 00/32] kmsan: Enable on s390 Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 01/32] ftrace: Unpoison ftrace_regs in ftrace_ops_list_func() Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 02/32] kmsan: Make the tests compatible with kmsan.panic=1 Ilya Leoshkevich
2023-11-16 9:27 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 03/32] kmsan: Disable KMSAN when DEFERRED_STRUCT_PAGE_INIT is enabled Ilya Leoshkevich
2023-11-16 9:41 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 04/32] kmsan: Increase the maximum store size to 4096 Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 05/32] kmsan: Fix is_bad_asm_addr() on arches with overlapping address spaces Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 06/32] kmsan: Fix kmsan_copy_to_user() " Ilya Leoshkevich
2023-11-16 10:13 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 07/32] kmsan: Remove a useless assignment from kmsan_vmap_pages_range_noflush() Ilya Leoshkevich
2023-11-16 10:52 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 08/32] kmsan: Remove an x86-specific #include from kmsan.h Ilya Leoshkevich
2023-11-16 9:44 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 09/32] kmsan: Introduce kmsan_memmove_metadata() Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 10/32] kmsan: Expose kmsan_get_metadata() Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 11/32] kmsan: Export panic_on_kmsan Ilya Leoshkevich
2023-11-16 9:14 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 12/32] kmsan: Allow disabling KMSAN checks for the current task Ilya Leoshkevich
2023-11-16 8:56 ` Alexander Potapenko
2023-11-16 9:17 ` Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 13/32] kmsan: Support SLAB_POISON Ilya Leoshkevich
2023-11-16 14:55 ` Alexander Potapenko
2023-11-16 15:08 ` Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 14/32] kmsan: Use ALIGN_DOWN() in kmsan_get_metadata() Ilya Leoshkevich
2023-11-16 9:54 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 15/32] mm: slub: Let KMSAN access metadata Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 16/32] mm: kfence: Disable KMSAN when checking the canary Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 17/32] lib/string: Add KMSAN support to strlcpy() and strlcat() Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 18/32] lib/zlib: Unpoison DFLTCC output buffers Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 19/32] kmsan: Accept ranges starting with 0 on s390 Ilya Leoshkevich
2023-11-16 10:33 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 20/32] s390: Turn off KMSAN for boot, vdso and purgatory Ilya Leoshkevich
2023-11-16 9:20 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 21/32] s390: Use a larger stack for KMSAN Ilya Leoshkevich
2023-11-16 9:45 ` Alexander Potapenko
2023-11-15 20:30 ` [PATCH 22/32] s390/boot: Add the KMSAN runtime stub Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 23/32] s390/checksum: Add a KMSAN check Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 24/32] s390/cpacf: Unpoison the results of cpacf_trng() Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 25/32] s390/ftrace: Unpoison ftrace_regs in kprobe_ftrace_handler() Ilya Leoshkevich
2023-11-15 20:30 ` [PATCH 26/32] s390/mm: Define KMSAN metadata for vmalloc and modules Ilya Leoshkevich
2023-11-16 15:03 ` Alexander Potapenko
2023-11-17 16:41 ` Alexander Gordeev
2023-11-15 20:30 ` [PATCH 27/32] s390/string: Add KMSAN support Ilya Leoshkevich
2023-11-16 21:42 ` kernel test robot
2023-11-15 20:31 ` [PATCH 28/32] s390/traps: Unpoison the kernel_stack_overflow()'s pt_regs Ilya Leoshkevich
2023-11-16 15:32 ` Alexander Potapenko
2023-11-15 20:31 ` [PATCH 29/32] s390/uaccess: Add KMSAN support to put_user() and get_user() Ilya Leoshkevich
2023-11-15 20:31 ` [PATCH 30/32] s390/unwind: Disable KMSAN checks Ilya Leoshkevich
2023-11-16 9:04 ` Alexander Potapenko
2023-11-16 9:05 ` Alexander Potapenko
2023-11-15 20:31 ` [PATCH 31/32] s390: Implement the architecture-specific kmsan functions Ilya Leoshkevich
2023-11-15 20:31 ` [PATCH 32/32] kmsan: Enable on s390 Ilya Leoshkevich
2023-11-16 8:42 ` [PATCH 00/32] " Alexander Potapenko
2023-11-16 10:13 ` Ilya Leoshkevich [this message]
2023-11-16 10:22 ` Christian Borntraeger
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