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 2DB50C43458 for ; Wed, 1 Jul 2026 10:29:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=FxfI8WnlOkIKPTOGKq/h45H4sXu6ERdre6P5S3dyTag=; b=rtN9Fv7Uxbb8mG fFer8HMee0KHsy3/cQqd7DemyySTZhzAUsHLqOCciSsFy9zpsgxgcZJj/wR+zNvBVnsO8W/79ynU0 vxCI2+FQr01UPjCIyrqnRxQH3qY3CbAClTf5ocbzPfli/hN0Ll+VKylOlxhyI3ak1XQI4YLPn9m4c UmA3TZ54aB3/PTIogwhEm0xnq04Dg2FsZ9e7opnN1lY2ckc1/QBqVunnPkNYykMGHRhbN47nw2sm/ +M46QOblHNwK0mbH753vHaqTKUzAMh0+abwOJwE6bQYv4yrNl4071GvJ2Gg760dfFAi1mkVDPAvl6 frnLUTF+Aye9+JkS9zUQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wesBl-00000001J8M-2ZVv; Wed, 01 Jul 2026 10:29:05 +0000 Received: from m16.mail.163.com ([117.135.210.2]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wesBi-00000001J6H-3iMM for linux-riscv@lists.infradead.org; Wed, 01 Jul 2026 10:29:04 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=Mb BT5bjBKldgVz9yhQSA+1XgKNkkTrf1SIHLbVsT2yE=; b=DGg69OoeAThhJ3YHx7 gERfiA0DTZp7X7off3nM40juq3H2ldXGdCKexYw7vNvjtbfYUV9IYYwxNBsKAIYF TmoReM6i+iRvkgi1Ca9BUBBNBqkBBNkh3PhOmaw0+9NekcppOAiM1IxbWdvaX8cT DrGo5clslIrZqcGl9uJ/N7O00= Received: from Ubuntu.. (unknown []) by gzga-smtp-mtada-g0-2 (Coremail) with SMTP id _____wD3V0jH60Rq_FlzGw--.4936S3; Wed, 01 Jul 2026 18:28:24 +0800 (CST) From: Xiaofeng Yuan To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: Alexandre Ghiti , Mark Brown , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, xiaofengmian@163.com Subject: [PATCH 1/2] riscv: mm: make EXECMEM_KPROBES writable without ARCH_HAS_EXECMEM_ROX Date: Wed, 1 Jul 2026 10:28:21 +0000 Message-ID: <20260701102822.95459-2-xiaofengmian@163.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260701102822.95459-1-xiaofengmian@163.com> References: <20260701102822.95459-1-xiaofengmian@163.com> MIME-Version: 1.0 X-CM-TRANSID: _____wD3V0jH60Rq_FlzGw--.4936S3 X-Coremail-Antispam: 1Uf129KBjvdXoW7GF48KF1ftryxGF4UtFyDAwb_yoWkCFX_G3 WxWryfurWrWrZ29F4Sgrs3C3WIkasFkFyDGrn7Wryjgr17W3s8X3y3JF13Xw4rCr1IgF4f AayfXFW09rn2vjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sRK89N5UUUUU== X-Originating-IP: [39.144.122.22] X-CM-SenderInfo: p0ld0w5hqjzxldq6il2tof0z/xtbC5QnY22pE68lXfwAA3L X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260701_032903_322438_6C52DDAD X-CRM114-Status: UNSURE ( 9.86 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org When CONFIG_ARCH_HAS_EXECMEM_ROX is not set, execmem cannot create temporary writable mappings for read-only executable pages. In this case, the execmem ranges must already have writable permissions. Currently EXECMEM_KPROBES unconditionally uses PAGE_KERNEL_READ_EXEC, which causes kprobe instruction slot writes to trigger page faults on systems where CONFIG_STRICT_MODULE_RWX is not enabled. Fix this by using PAGE_KERNEL_EXEC when CONFIG_ARCH_HAS_EXECMEM_ROX is not available. Signed-off-by: Xiaofeng Yuan --- arch/riscv/mm/init.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 5b1b3c88b..21794e7bb 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -1457,7 +1457,9 @@ struct execmem_info __init *execmem_arch_setup(void) [EXECMEM_KPROBES] = { .start = VMALLOC_START, .end = VMALLOC_END, - .pgprot = PAGE_KERNEL_READ_EXEC, + .pgprot = IS_ENABLED(CONFIG_ARCH_HAS_EXECMEM_ROX) ? + PAGE_KERNEL_READ_EXEC : + PAGE_KERNEL_EXEC, .alignment = 1, }, [EXECMEM_BPF] = { -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv