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 B8BC05661 for ; Thu, 20 Jun 2024 00:59:20 +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=1718845160; cv=none; b=iCBwIdKZLB862RaUV/Kj5LBeBvy4xfWhl52kFgUUHs5otjcT/yeKbbFzfevAqNpVBmr/jJTuUSAzJQP3zgGFSmf47g7HJVC+ZK2A3qVoecRAyNfBPiBj6irM0KvEzrWMkF+FnOr9JYx0k3OocQJ42liXc5aHu383nfgoUpDiLPI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718845160; c=relaxed/simple; bh=/bKviWay4On2LCwicwLTZol5UEwrfNK3YGiIdCtzejc=; h=Date:To:From:Subject:Message-Id; b=psGUrfhlWHeBZQIZAgsJ3/DnZ0zQwTNcgpHh0u/G0Wl/ej8903N5bjgGC1Xc24Y5BMOyat6Jurrwg5UmZ7L1Tqtwou9OHSrOnUD3O5hDWBdEQuhB+6ri0iebQxKUYCe3N2Nl8GpGjpd+kp0TBXWgInv/YAXIk9M4BOXvTZf9z1w= 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=09Ijkcb9; 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="09Ijkcb9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DD1AC2BBFC; Thu, 20 Jun 2024 00:59:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1718845160; bh=/bKviWay4On2LCwicwLTZol5UEwrfNK3YGiIdCtzejc=; h=Date:To:From:Subject:From; b=09Ijkcb9+ZkYh84+jn7Ugs96kYul3DeF6Q8o4ji/9F0kTL2bpFwaa5seeV+1Cr6yS 3JkbonZe5MBkg4qSug6rq+EsjXzNt/IAMfcUkbUauo+c2QGj7yWktIKvrMwmdZdfU5 e2ctQD75t9goTEyNQn2iA4UPJw0Uyb7/J/wTXp/s= Date: Wed, 19 Jun 2024 17:59:20 -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-traps-unpoison-the-kernel_stack_overflows-pt_regs.patch added to mm-unstable branch Message-Id: <20240620005920.8DD1AC2BBFC@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: s390/traps: unpoison the kernel_stack_overflow()'s pt_regs has been added to the -mm mm-unstable branch. Its filename is s390-traps-unpoison-the-kernel_stack_overflows-pt_regs.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/s390-traps-unpoison-the-kernel_stack_overflows-pt_regs.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/traps: unpoison the kernel_stack_overflow()'s pt_regs Date: Wed, 19 Jun 2024 17:44:07 +0200 This is normally done by the generic entry code, but the kernel_stack_overflow() flow bypasses it. Link: https://lkml.kernel.org/r/20240619154530.163232-33-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko Acked-by: Heiko Carstens 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/traps.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/arch/s390/kernel/traps.c~s390-traps-unpoison-the-kernel_stack_overflows-pt_regs +++ a/arch/s390/kernel/traps.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -262,6 +263,11 @@ static void monitor_event_exception(stru void kernel_stack_overflow(struct pt_regs *regs) { + /* + * Normally regs are unpoisoned by the generic entry code, but + * kernel_stack_overflow() is a rare case that is called bypassing it. + */ + kmsan_unpoison_entry_regs(regs); bust_spinlocks(1); printk("Kernel stack overflow.\n"); show_regs(regs); _ 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