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 240764685 for ; Thu, 20 Jun 2024 00:58:23 +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=1718845104; cv=none; b=NU1eVp71hesbi7oH21tUxbE+SAfaUCXY7TZLp7mvClmNO6FetvpVoGFHsvNruvyBIP46+otUIb3jYll0elJ6VfusIVCIylJZUK+CwYA5t/RENnskMtnWNevgn6vUxwiofTELMWUFVJEIgzxLsrMW6VkpQTGCgyju8YN8ar/pJ/c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718845104; c=relaxed/simple; bh=RfUmWRSW5+1Jf2ck7n+/gN7xoba/knL24yKOha+VuvU=; h=Date:To:From:Subject:Message-Id; b=l8Tt6Cm6YCIOibgsToA7ZqdvDDNI0SalkbQu3vty8+XGNw+xBrPQVzaWJzlh6KroNij9DKsMB2g6vJZwrVuF5QrUsntv93N30DMvr7Sy7sIR27O1tNgYqAopeZoGwfd/h/uoHX9o6EO6BHGb9AxnXe6BIe1E2Z4cGojf1tVQZsA= 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=dE5QxPWH; 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="dE5QxPWH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8CB90C2BBFC; Thu, 20 Jun 2024 00:58:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1718845103; bh=RfUmWRSW5+1Jf2ck7n+/gN7xoba/knL24yKOha+VuvU=; h=Date:To:From:Subject:From; b=dE5QxPWHs/wDyrRJinvc3+L8n4gLuaHPsSj1m4SFEuZir4RIWu4IwjQkvIiK/mHwu sGS7KTvMVzWpA9w+/fAqPl02piBakabkXkbJQUhQsF1XeHvN37XyisFWoifAnu6957 ei9n/TPRyRuaTrIdehyM2ut+6tAVg/DH9miY9Meo= Date: Wed, 19 Jun 2024 17:58:23 -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: + kmsan-fix-kmsan_copy_to_user-on-arches-with-overlapping-address-spaces.patch added to mm-unstable branch Message-Id: <20240620005823.8CB90C2BBFC@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: kmsan: fix kmsan_copy_to_user() on arches with overlapping address spaces has been added to the -mm mm-unstable branch. Its filename is kmsan-fix-kmsan_copy_to_user-on-arches-with-overlapping-address-spaces.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kmsan-fix-kmsan_copy_to_user-on-arches-with-overlapping-address-spaces.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: kmsan: fix kmsan_copy_to_user() on arches with overlapping address spaces Date: Wed, 19 Jun 2024 17:43:41 +0200 Comparing pointers with TASK_SIZE does not make sense when kernel and userspace overlap. Assume that we are handling user memory access in this case. Link: https://lkml.kernel.org/r/20240619154530.163232-7-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich Reported-by: Alexander Gordeev Reviewed-by: Alexander Potapenko Cc: Christian Borntraeger Cc: Christoph Lameter Cc: David Rientjes Cc: Dmitry Vyukov Cc: Heiko Carstens 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 --- mm/kmsan/hooks.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/mm/kmsan/hooks.c~kmsan-fix-kmsan_copy_to_user-on-arches-with-overlapping-address-spaces +++ a/mm/kmsan/hooks.c @@ -267,7 +267,8 @@ void kmsan_copy_to_user(void __user *to, return; ua_flags = user_access_save(); - if ((u64)to < TASK_SIZE) { + if (!IS_ENABLED(CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE) || + (u64)to < TASK_SIZE) { /* This is a user memory access, check it. */ kmsan_internal_check_memory((void *)from, to_copy - left, to, REASON_COPY_TO_USER); _ 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