From patchwork Tue Nov 21 22:00:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13463659 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="iiGY++jx" Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DCE11707; Tue, 21 Nov 2023 14:03:03 -0800 (PST) Received: from pps.filterd (m0353723.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLNPPt004548; Tue, 21 Nov 2023 22:02:36 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : content-transfer-encoding : mime-version; s=pp1; bh=RjV0VmLpgTE5xRgs1VZtKHdQWOiG339HDEHFOroOwi0=; b=iiGY++jxVINq5YYdnTCnhfTJ0ajRDPJ66VGkcJRUnZu4y19FRF8fHLho3FXXsxbAjTPX 6PyH06VUEPiV1PqbHYdgJ3iMJxCDealu5I/ZKL5DZq6ArbjP+LQx2ftqnTuGIopCvmdT ioUn2WtQ6XYxJqrvx3NFOJ5SfSEdKygFFklODd/aiu+GOq4UQuzkgfH4fzD7cjLO4NBR U+Q0wYtDqtJyJXTYvNrDErrddGtNbW+firVIAap80JA/bWW+DK1m74rRB9auFTefXiMM bWBoJ3FG/uYF6Lj9KQvHrNBVnQT2pUAKlwKCWft6d5XZqrkTiu3TlLzMOr9UkYMIKomH Iw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4dw0vq3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:36 +0000 Received: from m0353723.ppops.net (m0353723.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3ALLcJr7014500; Tue, 21 Nov 2023 22:02:35 GMT Received: from ppma12.dal12v.mail.ibm.com (dc.9e.1632.ip4.static.sl-reverse.com [50.22.158.220]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4dw0vcv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:35 +0000 Received: from pps.filterd (ppma12.dal12v.mail.ibm.com [127.0.0.1]) by ppma12.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLnQNN022908; Tue, 21 Nov 2023 22:02:05 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma12.dal12v.mail.ibm.com (PPS) with ESMTPS id 3uf7kt3yyb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:04 +0000 Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3ALM22eL40108430 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Nov 2023 22:02:02 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1122220065; Tue, 21 Nov 2023 22:02:02 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 923EB20063; Tue, 21 Nov 2023 22:02:00 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.179.23.98]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 21 Nov 2023 22:02:00 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Heiko Carstens , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka Cc: Christian Borntraeger , Dmitry Vyukov , 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 , Roman Gushchin , Sven Schnelle , Ilya Leoshkevich Subject: [PATCH v2 00/33] kmsan: Enable on s390 Date: Tue, 21 Nov 2023 23:00:54 +0100 Message-ID: <20231121220155.1217090-1-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: ueXSjJJuaiHBGWPQrdyNp8xXxndxHB57 X-Proofpoint-ORIG-GUID: luvmym5bCCb5oBro4vkAQpcqqUvW6UFi X-Proofpoint-UnRewURL: 0 URL was un-rewritten Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-21_12,2023-11-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 mlxlogscore=963 spamscore=0 suspectscore=0 phishscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 impostorscore=0 adultscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 v1: https://lore.kernel.org/lkml/20231115203401.2495875-1-iii@linux.ibm.com/ v1 -> v2: Add comments, sort #includes, introduce memset_no_sanitize_memory() and use it to avoid unpoisoning of redzones, change vmalloc alignment to _REGION3_SIZE, add R-bs (Alexander P.). Fix building [PATCH 28/33] s390/string: Add KMSAN support with FORTIFY_SOURCE. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202311170550.bSBo44ix-lkp@intel.com/ 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 [1] https://reviews.llvm.org/D148596 Ilya Leoshkevich (33): ftrace: Unpoison ftrace_regs in ftrace_ops_list_func() kmsan: Make the tests compatible with kmsan.panic=1 kmsan: Disable KMSAN when DEFERRED_STRUCT_PAGE_INIT is enabled kmsan: Increase the maximum store size to 4096 kmsan: Fix is_bad_asm_addr() on arches with overlapping address spaces kmsan: Fix kmsan_copy_to_user() on arches with overlapping address spaces kmsan: Remove a useless assignment from kmsan_vmap_pages_range_noflush() kmsan: Remove an x86-specific #include from kmsan.h kmsan: Introduce kmsan_memmove_metadata() kmsan: Expose kmsan_get_metadata() kmsan: Export panic_on_kmsan kmsan: Allow disabling KMSAN checks for the current task kmsan: Introduce memset_no_sanitize_memory() kmsan: Support SLAB_POISON kmsan: Use ALIGN_DOWN() in kmsan_get_metadata() mm: slub: Let KMSAN access metadata mm: kfence: Disable KMSAN when checking the canary lib/string: Add KMSAN support to strlcpy() and strlcat() lib/zlib: Unpoison DFLTCC output buffers kmsan: Accept ranges starting with 0 on s390 s390: Turn off KMSAN for boot, vdso and purgatory s390: Use a larger stack for KMSAN s390/boot: Add the KMSAN runtime stub s390/checksum: Add a KMSAN check s390/cpacf: Unpoison the results of cpacf_trng() s390/ftrace: Unpoison ftrace_regs in kprobe_ftrace_handler() s390/mm: Define KMSAN metadata for vmalloc and modules s390/string: Add KMSAN support s390/traps: Unpoison the kernel_stack_overflow()'s pt_regs s390/uaccess: Add KMSAN support to put_user() and get_user() s390/unwind: Disable KMSAN checks s390: Implement the architecture-specific kmsan functions kmsan: Enable on s390 Documentation/dev-tools/kmsan.rst | 4 +- arch/s390/Kconfig | 1 + arch/s390/Makefile | 2 +- arch/s390/boot/Makefile | 3 + arch/s390/boot/kmsan.c | 6 ++ arch/s390/boot/startup.c | 8 ++ arch/s390/boot/string.c | 16 ++++ arch/s390/include/asm/checksum.h | 2 + arch/s390/include/asm/cpacf.h | 2 + arch/s390/include/asm/kmsan.h | 36 +++++++++ arch/s390/include/asm/pgtable.h | 10 +++ arch/s390/include/asm/string.h | 20 +++-- arch/s390/include/asm/thread_info.h | 2 +- arch/s390/include/asm/uaccess.h | 110 ++++++++++++++++++++-------- arch/s390/kernel/ftrace.c | 1 + arch/s390/kernel/traps.c | 6 ++ arch/s390/kernel/unwind_bc.c | 4 + arch/s390/kernel/vdso32/Makefile | 3 +- arch/s390/kernel/vdso64/Makefile | 3 +- arch/s390/purgatory/Makefile | 2 + include/linux/kmsan-checks.h | 26 +++++++ include/linux/kmsan.h | 23 ++++++ include/linux/kmsan_types.h | 2 +- kernel/trace/ftrace.c | 1 + lib/string.c | 6 ++ lib/zlib_dfltcc/dfltcc.h | 1 + lib/zlib_dfltcc/dfltcc_util.h | 23 ++++++ mm/Kconfig | 1 + mm/kfence/core.c | 5 +- mm/kmsan/core.c | 2 +- mm/kmsan/hooks.c | 30 +++++++- mm/kmsan/init.c | 5 +- mm/kmsan/instrumentation.c | 11 +-- mm/kmsan/kmsan.h | 9 +-- mm/kmsan/kmsan_test.c | 5 ++ mm/kmsan/report.c | 7 +- mm/kmsan/shadow.c | 9 +-- mm/slub.c | 12 ++- 38 files changed, 345 insertions(+), 74 deletions(-) create mode 100644 arch/s390/boot/kmsan.c create mode 100644 arch/s390/include/asm/kmsan.h