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[147.75.199.223]) by mx.google.com with ESMTPS id u21-20020ac858d5000000b004259d9fde02si4164892qta.438.2023.12.22.03.58.09 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Dec 2023 03:58:09 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-9679-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=b9qp0VEO; spf=pass (google.com: domain of linux-kernel+bounces-9679-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) smtp.mailfrom="linux-kernel+bounces-9679-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ny.mirrors.kernel.org (Postfix) with ESMTPS id 98D251C24A06 for ; Fri, 22 Dec 2023 11:58:09 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 176FA1A726; Fri, 22 Dec 2023 11:57:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="b9qp0VEO" X-Original-To: linux-kernel@vger.kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6451F17985; Fri, 22 Dec 2023 11:57:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7A7F8C433C8; Fri, 22 Dec 2023 11:57:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1703246245; bh=OMHoJ47sH8QL4h4TQhZ+b4gxch9yOK4WdYt6lzVlcv4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b9qp0VEOGkrFAhxqIe4d6Y9gIs4x6sOfZwhGePIfwsqsVInwDYDn9xyPy0D6jHDf8 l80dp1DCIjiaIdq+5PnC7VMWBk1I1MVo2Kvz3lRX0lS+aStpiAEZpUTJ8a+nK6Cisq NPYiyqFkNnPd8iWk2opA3z9L0YWxKnMqBqifWtQZIoRcJt3hQZ5/8BdK20/JycOtV9 Vbu+Nf5bLXqImKx4F3uGjyRTiWakhBpnEd8OBDrR5Ky3U9rAjZcwI9w4n3wFEDlAUO JZQPQG3kpw5ZQVC2kAlMqOCLgqXJ97JXpA6tIzhx/yl2RMQQcSH9BYkEJx/5wHioZL HHbRAb8qWlz/w== From: guoren@kernel.org To: linux-kernel@vger.kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, alexghiti@rivosinc.com, charlie@rivosinc.com, xiao.w.wang@intel.com, guoren@kernel.org, david@redhat.com, panqinglin2020@iscas.ac.cn, rick.p.edgecombe@intel.com, willy@infradead.org, bjorn@rivosinc.com, conor.dooley@microchip.com, cleger@rivosinc.com, leobras@redhat.com Cc: linux-riscv@lists.infradead.org, Guo Ren , stable@vger.kernel.org Subject: [PATCH V3 1/4] riscv: mm: Fixup compat mode boot failure Date: Fri, 22 Dec 2023 06:57:00 -0500 Message-Id: <20231222115703.2404036-2-guoren@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231222115703.2404036-1-guoren@kernel.org> References: <20231222115703.2404036-1-guoren@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1785983181296459584 X-GMAIL-MSGID: 1785983181296459584 From: Guo Ren In COMPAT mode, the STACK_TOP is DEFAULT_MAP_WINDOW (0x80000000), but the TASK_SIZE is 0x7fff000. When the user stack is upon 0x7fff000, it will cause a user segment fault. Sometimes, it would cause boot failure when the whole rootfs is rv32. Freeing unused kernel image (initmem) memory: 2236K Run /sbin/init as init process Starting init: /sbin/init exists but couldn't execute it (error -14) Run /etc/init as init process ... Increase the TASK_SIZE to cover STACK_TOP. Cc: stable@vger.kernel.org Fixes: add2cc6b6515 ("RISC-V: mm: Restrict address space for sv39,sv48,sv57") Signed-off-by: Guo Ren Signed-off-by: Guo Ren Reviewed-by: Leonardo Bras Reviewed-by: Charlie Jenkins --- arch/riscv/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index ab00235b018f..74ffb2178f54 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -881,7 +881,7 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte) #define TASK_SIZE_MIN (PGDIR_SIZE_L3 * PTRS_PER_PGD / 2) #ifdef CONFIG_COMPAT -#define TASK_SIZE_32 (_AC(0x80000000, UL) - PAGE_SIZE) +#define TASK_SIZE_32 (_AC(0x80000000, UL)) #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) #else