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 E2097C5CFC1 for ; Fri, 14 Aug 2026 08:29:02 +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=KillvBgiiOUXxrcUdbMHpk9aR+iMSVr/qRbLPNKe5l0=; b=L1HFOMCmnRD5TL /VcENNd8yoL+IH8ysscYvhW4N7jnDDD8nKTE5bTDUNKMGhcgs1CBqZ5c1uhlsJvHCNT3k/3hrDmIF bBLotIN3WbWeLHMFpJuU3qZNGF2oaTwRhN3Qnorgjc0IucVDZeTkteGYdKIHNHuYfXPvqPopsHp36 KvTf5o2rDphNWRGbqHDd2Q5SsMedXjpZd0Xo13ekogtYVZ8/QnND28io280ngsDdcZgId5vPizFEG p4RYPhONm17Ka0jYkJ/greUb2TrDLzed36ko2Nv42cCLzv9zgFTdT2HbismzS21ritDbKF0jt/rWR pMBLhUkPiaQNRT20WlEA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wunHX-00000002HNY-22FJ; Fri, 14 Aug 2026 08:28:51 +0000 Received: from m16.mail.163.com ([117.135.210.3]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wunHS-00000002HKn-3W5z for linux-riscv@lists.infradead.org; Fri, 14 Aug 2026 08:28:49 +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=Jg 6xZqu7dbxREDlYqdaqjxUcNWuSqpTI5jZPGX3Lx8I=; b=SaQx4KCzFknWRUU+My qqDlz/PrYEpMsn+nWztHiOH5UBYrr4ltMFp0szrvDGoAiTA/8RqtKSHIiAx61JIT SzPs0316P0KV8xugsfGFQonDVzH9tVQj0jov4yCkWj1wdb1QDlKz7AxwXfOXdCKN lNuiHmXN1OlSkSb2GyQe9P4zM= Received: from Ubuntu.. (unknown []) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wD3dIl_0X5qdVL2Pg--.57693S3; Fri, 14 Aug 2026 16:27:45 +0800 (CST) From: Xiaofeng Yuan To: Paul Walmsley , Palmer Dabbelt , Albert Ou Cc: Alexandre Ghiti , Nam Cao , Klara Modin , prabhakar.csengg@gmail.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, xiaofengmian@163.com Subject: [PATCH v5 1/2] riscv: mm: make EXECMEM_KPROBES writable without CONFIG_STRICT_MODULE_RWX Date: Fri, 14 Aug 2026 08:27:41 +0000 Message-ID: <20260814082742.148403-2-xiaofengmian@163.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260814082742.148403-1-xiaofengmian@163.com> References: <20260814082742.148403-1-xiaofengmian@163.com> MIME-Version: 1.0 X-CM-TRANSID: _____wD3dIl_0X5qdVL2Pg--.57693S3 X-Coremail-Antispam: 1Uf129KBjvdXoW7Xw43Cw1DJF43uF15XrWrZrb_yoWkCrb_G3 WxWryfuayrW39Fg3WfKr4fC3W2kas7CF1UGrn7XFyqgrnrZ3s8X343XF15Xw45Cr1SgF4f Aa9xXayI9rn2vjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7sR_rb1UUUUUU== X-Originating-IP: [39.144.122.80] X-CM-SenderInfo: p0ld0w5hqjzxldq6il2tof0z/xtbC5gHO0Wp+0YEYYwAA3H X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260814_012847_266576_502048F5 X-CRM114-Status: UNSURE ( 9.19 ) 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_STRICT_MODULE_RWX 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_STRICT_MODULE_RWX 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 85bdcce63a..b084a72e5d 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -1462,7 +1462,9 @@ 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_STRICT_MODULE_RWX) ? + 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