From nobody Tue Oct 7 05:45:26 2025 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6DAB122DA08; Mon, 14 Jul 2025 07:04:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752476699; cv=none; b=Fz8mCgai61HlYUBtqS89G5BQ9nxP5jhMjyyaS06Gj1LSlvstN1XRA0Gdss59ln2Uz3qOgwghfv5mfzkBsnT0rrhAheoTQjeCEOqmnPNVBoxPaOVSlfAiT2uUaVq2DiflfiUSvmpfrHeECcQVK4499EB4PonheoH+fNoy6zx2YBQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752476699; c=relaxed/simple; bh=cToq3o3HlGCMSYHZ2d6IQRVOA5a0EC+VOiw+pnCaSKk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=oUNgw9zBnMazxf3ubQtFiHcMgec/h1U4NjGAo+3Fozl43GUdoKx03BvvpO/Ciob1HK+omcDV2y0Y4gUWP65RggDDO6d4NCZXcpCZpLa2U5w/efocywu4wKXO96RHuSH70Ncenyy8i7Yzqa1+8aTz6kiacmIVEWgBxxIqSCRG9TI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.193]) by gateway (Coremail) with SMTP id _____8DxzOIVrHRo6g4pAQ--.19529S3; Mon, 14 Jul 2025 15:04:53 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.193]) by front1 (Coremail) with SMTP id qMiowJAx_8EPrHRo4HoWAA--.4569S2; Mon, 14 Jul 2025 15:04:52 +0800 (CST) From: Huacai Chen To: Huacai Chen Cc: loongarch@lists.linux.dev, Xuefeng Li , Guo Ren , Xuerui Wang , Jiaxun Yang , linux-kernel@vger.kernel.org, Huacai Chen , stable@vger.kernel.org Subject: [PATCH] LoongArch: Make relocate_new_kernel_size be a .quad value Date: Mon, 14 Jul 2025 15:04:38 +0800 Message-ID: <20250714070438.2399153-1-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.47.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJAx_8EPrHRo4HoWAA--.4569S2 X-CM-SenderInfo: hfkh0x5xdftxo6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj9xXoW7GrWfWF17Ar18GFy5XryDXFc_yoWktrX_KF yxJws8Gr4UJF4jywn0vwsavr1Ygw15Jas5Cw1kX3yxJasxArWjyr45Xan5uwsIkr4kGrWY qw1DGFsayr42qosvyTuYvTs0mTUanT9S1TB71UUUUUDqnTZGkaVYY2UrUUUUj1kv1TuYvT s0mT0YCTnIWjqI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUI cSsGvfJTRUUUb7kYFVCjjxCrM7AC8VAFwI0_Jr0_Gr1l1xkIjI8I6I8E6xAIw20EY4v20x vaj40_Wr0E3s1l1IIY67AEw4v_Jrv_JF1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxS w2x7M28EF7xvwVC0I7IYx2IY67AKxVW8JVW5JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxV W8JVWxJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6xkF7I0E14v2 6F4UJVW0owAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07AIYIkI8VC2zVCFFI0UMc 02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAF wI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxAIw28IcxkI7V AKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCj r7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6x IIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY1x0267AKxVWUJVW8JwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x 0267AKxVWUJVW8JbIYCTnIWIevJa73UjIFyTuYvjxUcVc_UUUUU Content-Type: text/plain; charset="utf-8" Now relocate_new_kernel_size is a .long value, which means 32bit, so its high 32bit is undefined. This causes memcpy((void *)reboot_code_buffer, relocate_new_kernel, relocate_new_kernel_size) in machine_kexec_prepare() access out of range memories in some cases, and then end up with an ADE exception. So make relocate_new_kernel_size be a .quad value, which means 64bit, to avoid such errors. Cc: stable@vger.kernel.org Signed-off-by: Huacai Chen --- arch/loongarch/kernel/relocate_kernel.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/loongarch/kernel/relocate_kernel.S b/arch/loongarch/kerne= l/relocate_kernel.S index 84e6de2fd973..8b5140ac9ea1 100644 --- a/arch/loongarch/kernel/relocate_kernel.S +++ b/arch/loongarch/kernel/relocate_kernel.S @@ -109,4 +109,4 @@ SYM_CODE_END(kexec_smp_wait) relocate_new_kernel_end: =20 .section ".data" -SYM_DATA(relocate_new_kernel_size, .long relocate_new_kernel_end - relocat= e_new_kernel) +SYM_DATA(relocate_new_kernel_size, .quad relocate_new_kernel_end - relocat= e_new_kernel) --=20 2.47.1