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 6B0E976DD0 for ; Thu, 21 Dec 2023 21:38:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="neU96Lhm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CFA34C433C8; Thu, 21 Dec 2023 21:38:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1703194686; bh=HaT9/z+mPhdfxmld4OV6dkgwn81VZ6QFnKBJtNIRFw0=; h=Date:To:From:Subject:From; b=neU96Lhm8hXqp4/oUbK8cXq6rd7FY4toADlJh70UKhHmb68ID+ESXttJK6sDez06V 8laTPN6bLtMfzwd/mi9nojBj6CAE2ex5OkCUd5UAhu7GtRhYfSldyGuIQf6nuwHzTH jXaz+UekWopqcsidurhlJxKbZQGKyjPxFeC9X6TI= Date: Thu, 21 Dec 2023 13:38:05 -0800 To: mm-commits@vger.kernel.org,ryabinin.a.a@gmail.com,glider@google.com,elver@google.com,dvyukov@google.com,andreyknvl@google.com,akpm@linux-foundation.org From: Andrew Morton Subject: + kasan-speed-up-match_all_mem_tag-test-for-sw_tags.patch added to mm-unstable branch Message-Id: <20231221213806.CFA34C433C8@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The patch titled Subject: kasan: speed up match_all_mem_tag test for SW_TAGS has been added to the -mm mm-unstable branch. Its filename is kasan-speed-up-match_all_mem_tag-test-for-sw_tags.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kasan-speed-up-match_all_mem_tag-test-for-sw_tags.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: Andrey Konovalov Subject: kasan: speed up match_all_mem_tag test for SW_TAGS Date: Thu, 21 Dec 2023 21:04:53 +0100 Checking all 256 possible tag values in the match_all_mem_tag KASAN test is slow and produces 256 reports. Instead, just check the first 8 and the last 8. Link: https://lkml.kernel.org/r/6fe51262defd80cdc1150c42404977aafd1b6167.1703188911.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov Cc: Alexander Potapenko Cc: Andrey Ryabinin Cc: Dmitry Vyukov Cc: Marco Elver Signed-off-by: Andrew Morton --- mm/kasan/kasan_test.c | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/mm/kasan/kasan_test.c~kasan-speed-up-match_all_mem_tag-test-for-sw_tags +++ a/mm/kasan/kasan_test.c @@ -1797,6 +1797,14 @@ static void match_all_mem_tag(struct kun /* For each possible tag value not matching the pointer tag. */ for (tag = KASAN_TAG_MIN; tag <= KASAN_TAG_KERNEL; tag++) { + /* + * For Software Tag-Based KASAN, skip the majority of tag + * values to avoid the test printing too many reports. + */ + if (IS_ENABLED(CONFIG_KASAN_SW_TAGS) && + tag >= KASAN_TAG_MIN + 8 && tag <= KASAN_TAG_KERNEL - 8) + continue; + if (tag == get_tag(ptr)) continue; _ Patches currently in -mm which might be from andreyknvl@google.com are kasan-rename-kasan_slab_free_mempool-to-kasan_mempool_poison_object.patch kasan-move-kasan_mempool_poison_object.patch kasan-document-kasan_mempool_poison_object.patch kasan-add-return-value-for-kasan_mempool_poison_object.patch kasan-introduce-kasan_mempool_unpoison_object.patch kasan-introduce-kasan_mempool_poison_pages.patch kasan-introduce-kasan_mempool_unpoison_pages.patch kasan-clean-up-__kasan_mempool_poison_object.patch kasan-save-free-stack-traces-for-slab-mempools.patch kasan-clean-up-and-rename-____kasan_kmalloc.patch kasan-introduce-poison_kmalloc_large_redzone.patch kasan-save-alloc-stack-traces-for-mempool.patch mempool-skip-slub_debug-poisoning-when-kasan-is-enabled.patch mempool-use-new-mempool-kasan-hooks.patch mempool-introduce-mempool_use_prealloc_only.patch kasan-add-mempool-tests.patch kasan-rename-pagealloc-tests.patch kasan-reorder-tests.patch kasan-rename-and-document-kasan_unpoison_object_data.patch skbuff-use-mempool-kasan-hooks.patch io_uring-use-mempool-kasan-hook.patch lib-stackdepot-add-printk_deferred_enter-exit-guards.patch kasan-handle-concurrent-kasan_record_aux_stack-calls.patch kasan-memset-free-track-in-qlink_free.patch lib-stackdepot-fix-comment-in-include-linux-stackdepoth.patch kasan-arm64-improve-comments-for-kasan_shadow_start-end.patch mm-kasan-use-kasan_tag_kernel-instead-of-0xff.patch kasan-improve-kasan_non_canonical_hook.patch kasan-clean-up-kasan_requires_meta.patch kasan-update-kasan_poison-documentation-comment.patch kasan-clean-up-is_kfence_address-checks.patch kasan-respect-config_kasan_vmalloc-for-kasan_flag_vmalloc.patch kasan-check-kasan_vmalloc_enabled-in-vmalloc-tests.patch kasan-export-kasan_poison-as-gpl.patch kasan-remove-slub-checks-for-page_alloc-fallbacks-in-tests.patch kasan-speed-up-match_all_mem_tag-test-for-sw_tags.patch