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 E4F72CD8CA8 for ; Fri, 12 Jun 2026 04:45:09 +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:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NOOCtXcGKd5JxZcYNa0CCaNDWtbGtVPpAZnPySAOdUY=; b=QTK2j/N6EAFgHZM4OyWRVSrNrm RtmB7+GCacVEiloiGb/QlVwl8+O7rSJaLOQxm3267jHqo/gZD5DMa0U6no6MoJ34om6ej2T8Ntuqw z45O9ctX6MKORZFEcValnqp+vAdkGW6p7po4XBYqosfNYAsxo+iczSSNUpjyaqB9TC7aLl/d3D2u/ +2RSM/7oT1M4+WFiI6cHIQMgJNS0wa/8RVoKqz0rNbwgNR8VPTdWwSE/jAtyZ49QntrR9PqV6230F DnFfH/XoP+YWRNjNTOuNzsqTOK65I5vlEL8GU26nY9E1p9APDihCbaV/9BEfJ/2hYsV9nAyVaEmIX 6esXgqXw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wXtlP-0000000AM7q-2z2g; Fri, 12 Jun 2026 04:45:03 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wXtlN-0000000AM6l-1sNb for linux-arm-kernel@lists.infradead.org; Fri, 12 Jun 2026 04:45:02 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1C26E2E91; Thu, 11 Jun 2026 21:44:55 -0700 (PDT) Received: from cesw-amp-gbt-1s-m12830-01.blr.arm.com (cesw-amp-gbt-1s-m12830-01.blr.arm.com [10.164.195.31]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 2BAF13FAF5; Thu, 11 Jun 2026 21:44:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1781239499; bh=b00TklBGecqQHLra7PJTRi5mE5kXZpjh3sOy2Gf7YPQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q+ywobdJtIBtiIj1Lm87NJAvMg5U5ZyPO3GOiZE5j7oUMWa2LPjn5dzWP/UcvIfsR eAIppw1XHah98pdVj9WRrylHYixsfy899jM7BhUXauI0syxEiAplt27uUuk/UZ4Tct 1rn0H7QLZBrriUcOjns9J7XKs7UrCuhBG1BRs4Wk= From: Dev Jain To: ryabinin.a.a@gmail.com, akpm@linux-foundation.org, corbet@lwn.net Cc: Dev Jain , glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ryan.roberts@arm.com, anshuman.khandual@arm.com, kaleshsingh@google.com, 21cnbao@gmail.com, david@kernel.org, will@kernel.org, catalin.marinas@arm.com Subject: [RFC PATCH 1/2] kasan: hw_tags: Use KASAN_PAGE_REDZONE for vmalloc redzoning Date: Fri, 12 Jun 2026 04:44:23 +0000 Message-ID: <20260612044425.763060-2-dev.jain@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260612044425.763060-1-dev.jain@arm.com> References: <20260612044425.763060-1-dev.jain@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260611_214501_526485_2FAB7815 X-CRM114-Status: GOOD ( 10.31 ) 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 In preparation for adding "tag only on alloc" boot time option, use KASAN_PAGE_REDZONE instead of KASAN_TAG_INVALID for poisoning the tail end of the vmalloc allocation. Although both values are the same for hw tags, KASAN_SLAB_REDZONE is used for poisoning the tail end of a kmalloc object allocation, so maintain the pattern. Signed-off-by: Dev Jain --- mm/kasan/hw_tags.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index cbef5e450954e..c1a2b48808ed7 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -375,7 +375,7 @@ void *__kasan_unpoison_vmalloc(const void *start, unsigned long size, redzone_start = round_up((unsigned long)start + size, KASAN_GRANULE_SIZE); redzone_size = round_up(redzone_start, PAGE_SIZE) - redzone_start; - kasan_poison((void *)redzone_start, redzone_size, KASAN_TAG_INVALID, + kasan_poison((void *)redzone_start, redzone_size, KASAN_PAGE_REDZONE, flags & KASAN_VMALLOC_INIT); /* -- 2.43.0