From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0E676F9D0CE for ; Tue, 14 Apr 2026 13:13:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:References:To: From:Cc:Subject:Message-Id:Date:Content-Type:Content-Transfer-Encoding: Mime-Version:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ljtr9WPSUnaAjZD/FtGwji3II/sbFJuzXTsBaHKsQSU=; b=Ov31hNXzXOintjVYnDtOjKiG6U bqOw+pVYcTRcOQa+iHjEU1J1pFFbhdQRG3xYkvoNWV7svFqi0ChAk5ahYblhitoUGRsjEBH1+dzg6 Z3KBZibMtjz/xwGHvnNeks73wCzzTLeDatSTMYzaw+b3JakWBxQOin1L+AFU3ehq2OFEzuWsoeTEO EjHvrcTi8veyClLGa1tbsJS1i7EQfAxq1tWmWI21P1axGTFxHaPATf7XLgdXFXR+fctYkZvi21R/V OOzV6CRym8tXJCEUDS7+zqGPrSgnpw7j5RmOALGp2q2I4bb7uR2Z+OADVngr6LwDTNpfGO8cZtlz4 339WcNAw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCdZk-0000000HLq3-0Koo; Tue, 14 Apr 2026 13:13:08 +0000 Received: from smtpout-03.galae.net ([185.246.85.4]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCdZg-0000000HLpW-3HGl for linux-arm-kernel@lists.infradead.org; Tue, 14 Apr 2026 13:13:06 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 932294E429EC; Tue, 14 Apr 2026 13:13:01 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 46E3160410; Tue, 14 Apr 2026 13:13:01 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 569A6104500A2; Tue, 14 Apr 2026 15:12:48 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1776172379; h=from:subject:date:message-id:to:cc:mime-version:content-type: content-transfer-encoding:in-reply-to:references; bh=ljtr9WPSUnaAjZD/FtGwji3II/sbFJuzXTsBaHKsQSU=; b=lhDeNvog7+cXfwfKejAzO+yVIre7KeKOh4nxhyYR84tw7Qhs4CDNLFYshF/sNo/ddcHeul OAXDnRRPYFfdKmNFr6FNXLWBgkwR5bSerHfi1jG3QAuxmeyq9DKVn4ADpvD+k/LktKcxCV Qo+C51KQYvBPk2tQWgzerrUX38wX8fl9mns5nowg6aBHUe0QUCDETlFcTsN3Vd+g6AhDW1 t0+PPdVn0VXoKLO/NdWsu8xr8pa5SfFsPWlNHjagwF2HUg4Jwz/bTTtoEDbu5jNS5UXcqe /1a7m2ycQR5Rypiiam1nxF1Kid65dAD8mzMdsDqIpVAnb6rsDVnu+pzT2qXnlw== Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 14 Apr 2026 15:12:47 +0200 Message-Id: Subject: Re: [PATCH RFC bpf-next 1/8] kasan: expose generic kasan helpers Cc: "Alexei Starovoitov" , "Daniel Borkmann" , "Andrii Nakryiko" , "Martin KaFai Lau" , "Eduard Zingerman" , "Kumar Kartikeya Dwivedi" , "Song Liu" , "Yonghong Song" , "Jiri Olsa" , "John Fastabend" , "David S. Miller" , "David Ahern" , "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "Dave Hansen" , , "H. Peter Anvin" , "Shuah Khan" , "Maxime Coquelin" , "Alexandre Torgue" , "Andrey Ryabinin" , "Alexander Potapenko" , "Dmitry Vyukov" , "Vincenzo Frascino" , "Andrew Morton" , , "Bastien Curutchet" , "Thomas Petazzoni" , "Xu Kuohai" , , , , , , , , From: =?utf-8?q?Alexis_Lothor=C3=A9?= To: "Andrey Konovalov" , =?utf-8?b?QWxleGlzIExvdGhvcsOpIChlQlBGIEZvdW5kYXRpb24p?= X-Mailer: aerc 0.21.0-0-g5549850facc2 References: <20260413-kasan-v1-0-1a5831230821@bootlin.com> <20260413-kasan-v1-1-1a5831230821@bootlin.com> In-Reply-To: X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260414_061304_984121_3670DECD X-CRM114-Status: GOOD ( 12.52 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Andrey, thanks for the prompt review ! On Tue Apr 14, 2026 at 12:19 AM CEST, Andrey Konovalov wrote: > On Mon, Apr 13, 2026 at 8:29=E2=80=AFPM Alexis Lothor=C3=A9 (eBPF Foundat= ion) > wrote: >> [...] >> +#ifdef CONFIG_KASAN_GENERIC >> +void __asan_load1(void *p); >> +void __asan_store1(void *p); >> +void __asan_load2(void *p); >> +void __asan_store2(void *p); >> +void __asan_load4(void *p); >> +void __asan_store4(void *p); >> +void __asan_load8(void *p); >> +void __asan_store8(void *p); >> +void __asan_load16(void *p); >> +void __asan_store16(void *p); >> +#endif /* CONFIG_KASAN_GENERIC */ > > This looks ugly, let's not do this unless it's really required. > > You can just use kasan_check_read/write() instead - these are public > wrappers around the same shadow memory checking functions. And they > also work with the SW_TAGS mode, in case the BPF would want to use > that mode at some point. (For HW_TAGS, we only have kasan_check_byte() > that checks a single byte, but it can be extended in the future if > required to be used by BPF.) ACK, I'll try to use those kasan_check_read and kasan_check_write rather than __asan_{load,store}X. Alexis --=20 Alexis Lothor=C3=A9, Bootlin Embedded Linux and Kernel engineering https://bootlin.com