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Wed, 13 Dec 2023 23:36:10 GMT Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 18DFE2004B; Wed, 13 Dec 2023 23:36:10 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A01C320040; Wed, 13 Dec 2023 23:36:08 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.171.70.156]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 13 Dec 2023 23:36:08 +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 v3 00/34] kmsan: Enable on s390 Date: Thu, 14 Dec 2023 00:24:20 +0100 Message-ID: <20231213233605.661251-1-iii@linux.ibm.com> X-Mailer: git-send-email 2.43.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 561mDTmsINwMN72Ah6BOtZlL15AzLfxe X-Proofpoint-ORIG-GUID: Ogx47gAVtFngw5Il2WLfvhq0DJQYKCB0 Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-13_14,2023-12-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 impostorscore=0 clxscore=1015 adultscore=0 phishscore=0 mlxscore=0 bulkscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312130167 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: E2EF4A0014 X-Stat-Signature: zx6t8hj4fh148bq3s9i3kruhmn1etcj3 X-HE-Tag: 1702510586-417232 X-HE-Meta: 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 NBwdWUER BY2JcRBLB6K05gz9G4yriKfTlLb5msFGlQ7kgKm/8t/Pj0XpmSJPB7WQZa184HNjKqMAUsqo/QoBEoL3197j/6pXwAQsQmqM5IH0T252lE4MHG1Y0rNW3uURDztIVYH3HOAIgKktXlQ0cGO4LvWbxw7GQyLa1meFMs0rMQThReob4PgVTbrPlp4nK3XRrsGOU8Nyy2v0jnQvOfKXqjVPcxtf5Ba7H/FBT8uRnxzGH1pky7gKU5OsgidEVcejQ5XK5RK+4pWEUY1lU4v9zx3uw4E6KTY4weYixmkYcUgnPm2sElUGZzETefq72PWK+lkjc6KA/H+mh7MibTNtHq9BN8LrvrcDZ4eBlFVdNC7y6LddMBCg= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: v2: https://lore.kernel.org/lkml/20231121220155.1217090-1-iii@linux.ibm.com/ v2 -> v3: Drop kmsan_memmove_metadata() and strlcpy() patches; Remove kmsan_get_metadata() stub; Move kmsan_enable_current() and kmsan_disable_current() to include/linux/kmsan.h, explain why a counter is needed; Drop the memset_no_sanitize_memory() patch; Use __memset() in the SLAB_POISON patch; Add kmsan-checks.h to the DFLTCC patch; Add recursion check to the arch_kmsan_get_meta_or_null() patch (Alexander P.). Fix inline + __no_kmsan_checks issues. New patch for s390/irqflags, that resolves a lockdep warning. New patch for s390/diag, that resolves a false positive when running on an LPAR. New patch for STCCTM, same as above. New patch for check_bytes_and_report() that resolves a false positive that occurs even on Intel. 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 (34): 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: Expose kmsan_get_metadata() kmsan: Export panic_on_kmsan kmsan: Allow disabling KMSAN checks for the current task kmsan: Support SLAB_POISON kmsan: Use ALIGN_DOWN() in kmsan_get_metadata() mm: slub: Let KMSAN access metadata mm: slub: Unpoison the memchr_inv() return value mm: kfence: Disable KMSAN when checking the canary 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/cpumf: Unpoison STCCTM output buffer s390/diag: Unpoison diag224() output buffer s390/ftrace: Unpoison ftrace_regs in kprobe_ftrace_handler() s390/irqflags: Do not instrument arch_local_irq_*() with KMSAN 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 | 3 + arch/s390/include/asm/cpu_mf.h | 6 ++ arch/s390/include/asm/irqflags.h | 18 ++++- arch/s390/include/asm/kmsan.h | 43 +++++++++++ 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 | 111 ++++++++++++++++++++-------- arch/s390/kernel/diag.c | 2 + arch/s390/kernel/ftrace.c | 2 + 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 + drivers/s390/char/sclp.c | 2 +- include/linux/kmsan.h | 33 +++++++++ include/linux/kmsan_types.h | 2 +- kernel/trace/ftrace.c | 1 + lib/zlib_dfltcc/dfltcc.h | 1 + lib/zlib_dfltcc/dfltcc_util.h | 24 ++++++ mm/Kconfig | 1 + mm/kfence/core.c | 11 ++- mm/kmsan/core.c | 1 - mm/kmsan/hooks.c | 23 ++++-- 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 | 8 +- mm/kmsan/shadow.c | 9 +-- mm/slub.c | 17 ++++- 40 files changed, 360 insertions(+), 80 deletions(-) create mode 100644 arch/s390/boot/kmsan.c create mode 100644 arch/s390/include/asm/kmsan.h -- 2.43.0