From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-12.7 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FSL_HELO_FAKE,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE, USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 651E07D90F for ; Fri, 15 Nov 2019 11:55:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727323AbfKOLzf (ORCPT ); Fri, 15 Nov 2019 06:55:35 -0500 Received: from mail-wm1-f67.google.com ([209.85.128.67]:40700 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727196AbfKOLze (ORCPT ); Fri, 15 Nov 2019 06:55:34 -0500 Received: by mail-wm1-f67.google.com with SMTP id f3so10081033wmc.5 for ; Fri, 15 Nov 2019 03:55:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Y2n2+Uz9lfxeIcRjHd5xKcgiwSj7xMIx4TZvu7ih+9A=; b=d37xtxs0OyxXEgxd2vBPqffrAhLM/MRpoLejTA0XmotnghUoYngT44PnZEzK6iiiak kcO3q0hw8V3w4uTUZ00JW6SZQjPxPHgqB7FDBNiZV1fLYedu0ISVeMuMDApHmR6Q/w/r uxO8uzDlOqJPyOjSf5pPVsWOE/RLJ1DKTXjarVFpaM6Q2Gt9LlepYKj0oeGbdRhtXJtx fKwXnqs0Senmm91apKAJI7LBWwn4ogo77hDaKe4af+ZUI64piUH5/wjbJLXpZvW2JvxJ GhfmQhgHVCwldueHxjdETOqKBKO2tsmJAZll2+/BiWxwhGUZWNcGLtZbHwe6fSIt3jpG VIzw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Y2n2+Uz9lfxeIcRjHd5xKcgiwSj7xMIx4TZvu7ih+9A=; b=ZCuFz5kGmxSIqWw7vH1BwPy0XnIoVHdgGWe6idyGmsuHo9LaK2ooUd+SkHJVV2pJwo YCqnyfEAPY2G7kLswbFYsS/5cDUsKWjOiKUtW0flcpiHB/34PQx/wHF4EkcLNbIvnxf0 bdeDZlEyiID4DaEoDiMsWLM+9Ss6kBR6Mrqhtqd0tFYKaaRrbXAtkcA6JDk/ChQytw6X AjSu6Ba/SDcnKuU/z+AuKFvramVGL8q7Jz7Q2gG3E1b54TJGhUKe4aT0ZK/weI+KEwYR F5tRquuWvOBfS8fvjIlhx2gC4rD9TfQY9mm6Ysfz8B44Pe7yD0uWSUbnuLnYZ7ifMliS 13Kw== X-Gm-Message-State: APjAAAW9FN9eXc2H9VKw1JOhoz7dOZJ5oVm7n7t4dqRUCXRjLEgGTMZT VrbkzMqVph8z1CjXfmHmlbH5Sw== X-Google-Smtp-Source: APXvYqy2kfX55qFBNCb+Wrn5ApCpMkIIPzig/1KQ0/VrZP9q4n9Rn3BPNonIOGVM4M7H0XvQuYQdEQ== X-Received: by 2002:a1c:6a0d:: with SMTP id f13mr14719193wmc.164.1573818931176; Fri, 15 Nov 2019 03:55:31 -0800 (PST) Received: from google.com ([100.105.32.75]) by smtp.gmail.com with ESMTPSA id d202sm8926257wmd.47.2019.11.15.03.55.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Nov 2019 03:55:30 -0800 (PST) Date: Fri, 15 Nov 2019 12:55:24 +0100 From: Marco Elver To: akiyks@gmail.com, stern@rowland.harvard.edu, glider@google.com, parri.andrea@gmail.com, andreyknvl@google.com, luto@kernel.org, ard.biesheuvel@linaro.org, arnd@arndb.de, boqun.feng@gmail.com, bp@alien8.de, dja@axtens.net, dlustig@nvidia.com, dave.hansen@linux.intel.com, dhowells@redhat.com, dvyukov@google.com, hpa@zytor.com, mingo@redhat.com, j.alglave@ucl.ac.uk, joel@joelfernandes.org, corbet@lwn.net, jpoimboe@redhat.com, luc.maranget@inria.fr, mark.rutland@arm.com, npiggin@gmail.com, paulmck@kernel.org, peterz@infradead.org, tglx@linutronix.de, will@kernel.org, edumazet@google.com, kasan-dev@googlegroups.com, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org Subject: Re: [PATCH v4 08/10] asm-generic, kcsan: Add KCSAN instrumentation for bitops Message-ID: <20191115115524.GA77379@google.com> References: <20191114180303.66955-1-elver@google.com> <20191114180303.66955-9-elver@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191114180303.66955-9-elver@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Signed-off-by: Marco Elver --- Tentative version of the bitops patch that applies with the new instrumented bitops infrastructure currently in linux-next. (Note that that test_bit() is an atomic bitop, but is currently in the wrong header.) Otherwise there is no functional change compared to v4 that applies to mainline. --- include/asm-generic/bitops/instrumented-atomic.h | 7 +++++++ include/asm-generic/bitops/instrumented-lock.h | 5 +++++ include/asm-generic/bitops/instrumented-non-atomic.h | 8 ++++++++ 3 files changed, 20 insertions(+) diff --git a/include/asm-generic/bitops/instrumented-atomic.h b/include/asm-generic/bitops/instrumented-atomic.h index 18ce3c9e8eec..eb3abf7e5c08 100644 --- a/include/asm-generic/bitops/instrumented-atomic.h +++ b/include/asm-generic/bitops/instrumented-atomic.h @@ -12,6 +12,7 @@ #define _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H #include +#include /** * set_bit - Atomically set a bit in memory @@ -26,6 +27,7 @@ static inline void set_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); arch_set_bit(nr, addr); } @@ -39,6 +41,7 @@ static inline void set_bit(long nr, volatile unsigned long *addr) static inline void clear_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); arch_clear_bit(nr, addr); } @@ -55,6 +58,7 @@ static inline void clear_bit(long nr, volatile unsigned long *addr) static inline void change_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); arch_change_bit(nr, addr); } @@ -68,6 +72,7 @@ static inline void change_bit(long nr, volatile unsigned long *addr) static inline bool test_and_set_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_set_bit(nr, addr); } @@ -81,6 +86,7 @@ static inline bool test_and_set_bit(long nr, volatile unsigned long *addr) static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_clear_bit(nr, addr); } @@ -94,6 +100,7 @@ static inline bool test_and_clear_bit(long nr, volatile unsigned long *addr) static inline bool test_and_change_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_change_bit(nr, addr); } diff --git a/include/asm-generic/bitops/instrumented-lock.h b/include/asm-generic/bitops/instrumented-lock.h index ec53fdeea9ec..2c80dca31e27 100644 --- a/include/asm-generic/bitops/instrumented-lock.h +++ b/include/asm-generic/bitops/instrumented-lock.h @@ -12,6 +12,7 @@ #define _ASM_GENERIC_BITOPS_INSTRUMENTED_LOCK_H #include +#include /** * clear_bit_unlock - Clear a bit in memory, for unlock @@ -23,6 +24,7 @@ static inline void clear_bit_unlock(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); arch_clear_bit_unlock(nr, addr); } @@ -38,6 +40,7 @@ static inline void clear_bit_unlock(long nr, volatile unsigned long *addr) static inline void __clear_bit_unlock(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); arch___clear_bit_unlock(nr, addr); } @@ -53,6 +56,7 @@ static inline void __clear_bit_unlock(long nr, volatile unsigned long *addr) static inline bool test_and_set_bit_lock(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); return arch_test_and_set_bit_lock(nr, addr); } @@ -72,6 +76,7 @@ static inline bool clear_bit_unlock_is_negative_byte(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_write(addr + BIT_WORD(nr), sizeof(long)); return arch_clear_bit_unlock_is_negative_byte(nr, addr); } /* Let everybody know we have it. */ diff --git a/include/asm-generic/bitops/instrumented-non-atomic.h b/include/asm-generic/bitops/instrumented-non-atomic.h index 95ff28d128a1..8479af8b3309 100644 --- a/include/asm-generic/bitops/instrumented-non-atomic.h +++ b/include/asm-generic/bitops/instrumented-non-atomic.h @@ -12,6 +12,7 @@ #define _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H #include +#include /** * __set_bit - Set a bit in memory @@ -25,6 +26,7 @@ static inline void __set_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); arch___set_bit(nr, addr); } @@ -40,6 +42,7 @@ static inline void __set_bit(long nr, volatile unsigned long *addr) static inline void __clear_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); arch___clear_bit(nr, addr); } @@ -55,6 +58,7 @@ static inline void __clear_bit(long nr, volatile unsigned long *addr) static inline void __change_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); arch___change_bit(nr, addr); } @@ -69,6 +73,7 @@ static inline void __change_bit(long nr, volatile unsigned long *addr) static inline bool __test_and_set_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); return arch___test_and_set_bit(nr, addr); } @@ -83,6 +88,7 @@ static inline bool __test_and_set_bit(long nr, volatile unsigned long *addr) static inline bool __test_and_clear_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); return arch___test_and_clear_bit(nr, addr); } @@ -97,6 +103,7 @@ static inline bool __test_and_clear_bit(long nr, volatile unsigned long *addr) static inline bool __test_and_change_bit(long nr, volatile unsigned long *addr) { kasan_check_write(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_write(addr + BIT_WORD(nr), sizeof(long)); return arch___test_and_change_bit(nr, addr); } @@ -108,6 +115,7 @@ static inline bool __test_and_change_bit(long nr, volatile unsigned long *addr) static inline bool test_bit(long nr, const volatile unsigned long *addr) { kasan_check_read(addr + BIT_WORD(nr), sizeof(long)); + kcsan_check_atomic_read(addr + BIT_WORD(nr), sizeof(long)); return arch_test_bit(nr, addr); } -- 2.24.0.432.g9d3f5f5b63-goog