From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B8D815661 for ; Thu, 20 Jun 2024 00:59:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718845149; cv=none; b=LbQoRkYM1Z+msmu9fCZDBv52c1D/uipgoVe3sIdfn8+itD8D62b/3mqz4Wiuxx4tlrRJ9vFYn8xM/Xq7kX1I2jyrokmHktnByzEnNYH5Hhu8jpCoh5CyH+ABMB2v8Vo9P7101jJsMHy4FyCrcv+BAaeQsIpA61brmzKDumLPYoQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718845149; c=relaxed/simple; bh=kil5QO7oGhcWIADyk2+bEs0WtziBXQs1yvVaIz0Gx0w=; h=Date:To:From:Subject:Message-Id; b=GyuofQ+QPwxLB71DSmdDDKxr1YNltyjlPSqR74PxnyHSxJ1Q2jVkqNhJcDnAJIxCGTaqLc5VpQ09BHj8bIQJkLB/Uu5CZHF5IzSTIn/ReB2JYIJoOG/xs3RlGo9CqYaggUyzTsV8vWJuR7S0KFWJ2EVMkhkXWmfM+9it9hjctXg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=Waa6SUXs; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="Waa6SUXs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DA00C2BBFC; Thu, 20 Jun 2024 00:59:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1718845149; bh=kil5QO7oGhcWIADyk2+bEs0WtziBXQs1yvVaIz0Gx0w=; h=Date:To:From:Subject:From; b=Waa6SUXsSnJai/BEu0j5KAMSBjee+RUtk/YgLe4DN6g6NLLj0UoDvJI8ldVtO+VfW ZNH4VjNJHTz/I8umLMjtqLIlzwUsTGuYCN4dBfeFwJxLy8YHhADBmWlCYUHFXtrHsP xJlpHvm942Iml2LRd6xYVeCFwIvfIdmEQkkahspA= Date: Wed, 19 Jun 2024 17:59:09 -0700 To: mm-commits@vger.kernel.org,vbabka@suse.cz,svens@linux.ibm.com,rostedt@goodmis.org,roman.gushchin@linux.dev,rientjes@google.com,penberg@kernel.org,mhiramat@kernel.org,mark.rutland@arm.com,kasan-dev@googlegroups.com,iamjoonsoo.kim@lge.com,hca@linux.ibm.com,gor@linux.ibm.com,glider@google.com,elver@google.com,dvyukov@google.com,cl@linux.com,borntraeger@linux.ibm.com,agordeev@linux.ibm.com,42.hyeyoo@gmail.com,iii@linux.ibm.com,akpm@linux-foundation.org From: Andrew Morton Subject: + s390-diag-unpoison-diag224-output-buffer.patch added to mm-unstable branch Message-Id: <20240620005909.8DA00C2BBFC@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: s390/diag: unpoison diag224() output buffer has been added to the -mm mm-unstable branch. Its filename is s390-diag-unpoison-diag224-output-buffer.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/s390-diag-unpoison-diag224-output-buffer.patch This patch will later appear in the mm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Ilya Leoshkevich Subject: s390/diag: unpoison diag224() output buffer Date: Wed, 19 Jun 2024 17:44:02 +0200 Diagnose 224 stores 4k bytes, which currently cannot be deduced from the inline assembly constraints. This leads to KMSAN false positives. Fix the constraints by using a 4k-sized struct instead of a raw pointer. While at it, prettify them too. Link: https://lkml.kernel.org/r/20240619154530.163232-28-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich Suggested-by: Heiko Carstens Reviewed-by: Alexander Potapenko Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Christoph Lameter Cc: David Rientjes Cc: Dmitry Vyukov Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim Cc: Cc: Marco Elver Cc: Mark Rutland Cc: Masami Hiramatsu (Google) Cc: Pekka Enberg Cc: Roman Gushchin Cc: Steven Rostedt (Google) Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- arch/s390/kernel/diag.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) --- a/arch/s390/kernel/diag.c~s390-diag-unpoison-diag224-output-buffer +++ a/arch/s390/kernel/diag.c @@ -278,12 +278,14 @@ int diag224(void *ptr) int rc = -EOPNOTSUPP; diag_stat_inc(DIAG_STAT_X224); - asm volatile( - " diag %1,%2,0x224\n" - "0: lhi %0,0x0\n" + asm volatile("\n" + " diag %[type],%[addr],0x224\n" + "0: lhi %[rc],0\n" "1:\n" EX_TABLE(0b,1b) - : "+d" (rc) :"d" (0), "d" (addr) : "memory"); + : [rc] "+d" (rc) + , "=m" (*(struct { char buf[PAGE_SIZE]; } *)ptr) + : [type] "d" (0), [addr] "d" (addr)); return rc; } EXPORT_SYMBOL(diag224); _ Patches currently in -mm which might be from iii@linux.ibm.com are ftrace-unpoison-ftrace_regs-in-ftrace_ops_list_func.patch kmsan-make-the-tests-compatible-with-kmsanpanic=1.patch kmsan-disable-kmsan-when-deferred_struct_page_init-is-enabled.patch kmsan-increase-the-maximum-store-size-to-4096.patch kmsan-fix-is_bad_asm_addr-on-arches-with-overlapping-address-spaces.patch kmsan-fix-kmsan_copy_to_user-on-arches-with-overlapping-address-spaces.patch kmsan-remove-a-useless-assignment-from-kmsan_vmap_pages_range_noflush.patch kmsan-remove-an-x86-specific-include-from-kmsanh.patch kmsan-expose-kmsan_get_metadata.patch kmsan-export-panic_on_kmsan.patch kmsan-allow-disabling-kmsan-checks-for-the-current-task.patch kmsan-introduce-memset_no_sanitize_memory.patch kmsan-support-slab_poison.patch kmsan-use-align_down-in-kmsan_get_metadata.patch kmsan-do-not-round-up-pg_data_t-size.patch mm-slub-let-kmsan-access-metadata.patch mm-slub-disable-kmsan-when-checking-the-padding-bytes.patch mm-kfence-disable-kmsan-when-checking-the-canary.patch lib-zlib-unpoison-dfltcc-output-buffers.patch kmsan-accept-ranges-starting-with-0-on-s390.patch s390-boot-turn-off-kmsan.patch s390-use-a-larger-stack-for-kmsan.patch s390-boot-add-the-kmsan-runtime-stub.patch s390-checksum-add-a-kmsan-check.patch s390-cpacf-unpoison-the-results-of-cpacf_trng.patch s390-cpumf-unpoison-stcctm-output-buffer.patch s390-diag-unpoison-diag224-output-buffer.patch s390-ftrace-unpoison-ftrace_regs-in-kprobe_ftrace_handler.patch s390-irqflags-do-not-instrument-arch_local_irq_-with-kmsan.patch s390-mm-define-kmsan-metadata-for-vmalloc-and-modules.patch s390-string-add-kmsan-support.patch s390-traps-unpoison-the-kernel_stack_overflows-pt_regs.patch s390-uaccess-add-kmsan-support-to-put_user-and-get_user.patch s390-uaccess-add-the-missing-linux-instrumentedh-include.patch s390-unwind-disable-kmsan-checks.patch s390-kmsan-implement-the-architecture-specific-functions.patch kmsan-enable-on-s390.patch