From patchwork Tue May 19 13:44:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11557743 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3716B912 for ; Tue, 19 May 2020 13:46:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1F466204EF for ; Tue, 19 May 2020 13:46:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="jrCWhGlV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728894AbgESNqs (ORCPT ); Tue, 19 May 2020 09:46:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729131AbgESNpQ (ORCPT ); Tue, 19 May 2020 09:45:16 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CA1AC08C5C0; Tue, 19 May 2020 06:45:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=vJr8Nd36WTtjRbTcnMJfPCvQoz7VGVQf3j70KzB4hjE=; b=jrCWhGlVo4Ct3iRycyUUPVuttW MP7KoMrZ/vwwhokUxNobucpMbvwMCOWuFEHctpnYImXmtK5px0AHhWgm5uEDt1GyMfS94/te4MBgQ GeYD/7qO9ZtJW9i8sJ8tRIjUrUj6sYUQ4AMPGcuGVlRopB68tWYzzBZEkq8L2VwWX4fDCbFqbh/tM an1U0+NRH0K58mSXpjiNj3arb/rkkvsKz0cfdLxqw3afYYg2Idl+kK0CkL/gBg8UvM4A9EQZZP/O7 udBbQ3u4NtzjuqSmCxxXr52T+cCoWcBh9Voni0qXVMQszAqXvKS9aEEyKhtdAALSfA6fhNAHYpkQb mZG7raKQ==; Received: from [2001:4bb8:188:1506:c70:4a89:bc61:2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jb2YU-0003E0-Bw; Tue, 19 May 2020 13:45:15 +0000 From: Christoph Hellwig To: x86@kernel.org, Alexei Starovoitov , Daniel Borkmann , Masami Hiramatsu , Linus Torvalds , Andrew Morton Cc: linux-parisc@vger.kernel.org, linux-um@lists.infradead.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 07/20] maccess: rename strncpy_from_unsafe_strict to strncpy_from_kernel_nofault Date: Tue, 19 May 2020 15:44:36 +0200 Message-Id: <20200519134449.1466624-8-hch@lst.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200519134449.1466624-1-hch@lst.de> References: <20200519134449.1466624-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org This matches the naming of strncpy_from_user_nofault, and also makes it more clear what the function is supposed to do. Signed-off-by: Christoph Hellwig --- arch/x86/mm/maccess.c | 2 +- include/linux/uaccess.h | 4 ++-- kernel/trace/bpf_trace.c | 4 ++-- mm/maccess.c | 6 +++--- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/x86/mm/maccess.c b/arch/x86/mm/maccess.c index f5b85bdc0535c..62c4017a2473d 100644 --- a/arch/x86/mm/maccess.c +++ b/arch/x86/mm/maccess.c @@ -34,7 +34,7 @@ long probe_kernel_read_strict(void *dst, const void *src, size_t size) return __probe_kernel_read(dst, src, size); } -long strncpy_from_unsafe_strict(char *dst, const void *unsafe_addr, long count) +long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count) { if (unlikely(invalid_probe_range((unsigned long)unsafe_addr))) return -EFAULT; diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index b983cb1c1216a..134ff9c1c151b 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -310,8 +310,8 @@ extern long notrace probe_kernel_write(void *dst, const void *src, size_t size); extern long notrace probe_user_write(void __user *dst, const void *src, size_t size); extern long strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count); -extern long strncpy_from_unsafe_strict(char *dst, const void *unsafe_addr, - long count); +long strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, + long count); extern long __strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count); long strncpy_from_user_nofault(char *dst, const void __user *unsafe_addr, long count); diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 4e20bf1d95832..f5231ffea85b9 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -240,7 +240,7 @@ bpf_probe_read_kernel_str_common(void *dst, u32 size, const void *unsafe_ptr, * is returned that can be used for bpf_perf_event_output() et al. */ ret = compat ? strncpy_from_unsafe(dst, unsafe_ptr, size) : - strncpy_from_unsafe_strict(dst, unsafe_ptr, size); + strncpy_from_kernel_nofault(dst, unsafe_ptr, size); if (unlikely(ret < 0)) out: memset(dst, 0, size); @@ -412,7 +412,7 @@ BPF_CALL_5(bpf_trace_printk, char *, fmt, u32, fmt_size, u64, arg1, break; #endif case 'k': - strncpy_from_unsafe_strict(buf, unsafe_ptr, + strncpy_from_kernel_nofault(buf, unsafe_ptr, sizeof(buf)); break; case 'u': diff --git a/mm/maccess.c b/mm/maccess.c index 457d8f9bf714f..c8748c2809096 100644 --- a/mm/maccess.c +++ b/mm/maccess.c @@ -159,7 +159,7 @@ long probe_user_write(void __user *dst, const void *src, size_t size) * If @count is smaller than the length of the string, copies @count-1 bytes, * sets the last byte of @dst buffer to NUL and returns @count. * - * Same as strncpy_from_unsafe_strict() except that for architectures with + * Same as strncpy_from_kernel_nofault() except that for architectures with * not fully separated user and kernel address spaces this function also works * for user address tanges. * @@ -170,7 +170,7 @@ long __weak strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count) __attribute__((alias("__strncpy_from_unsafe"))); /** - * strncpy_from_unsafe_strict: - Copy a NUL terminated string from unsafe + * strncpy_from_kernel_nofault: - Copy a NUL terminated string from unsafe * address. * @dst: Destination address, in kernel space. This buffer must be at * least @count bytes long. @@ -187,7 +187,7 @@ long __weak strncpy_from_unsafe(char *dst, const void *unsafe_addr, long count) * If @count is smaller than the length of the string, copies @count-1 bytes, * sets the last byte of @dst buffer to NUL and returns @count. */ -long __weak strncpy_from_unsafe_strict(char *dst, const void *unsafe_addr, +long __weak strncpy_from_kernel_nofault(char *dst, const void *unsafe_addr, long count) __attribute__((alias("__strncpy_from_unsafe")));