From nobody Thu Apr 9 12:54:35 2026 Received: from cstnet.cn (smtp81.cstnet.cn [159.226.251.81]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4A64B396B82 for ; Mon, 9 Mar 2026 11:09:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.81 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773054591; cv=none; b=RRBNWcnb+xp30wQeF0PAD1UGkwh9gi4eEAaJOaZZuQArqpTWIb2yYz6ynm4oZ8lfooXgkaTh/rPLIcvK1lEwezSoD6rbjeElySCET0pDoQCkyVGWwVSse1fu/DBCceQWn79+/55dypI5tYqCr1iX8hcqoxQlOLyTogxYwHn+It4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773054591; c=relaxed/simple; bh=RE5i6Wa6vLmmVax26peZP8+QXDuVBIGc++kdVM8fqpI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=VQDYhH2KrflGldRDWjJoHgWZ+vT1hjnrZHWE+WEp6BIZ57VMJ+9e2aAQl0KPj3+U77zL+/GMj0WBghUIJWdX59wMj6X9TftQ8ZcB5YYnRvdmsMMmsC8hrFb92a1VMaPp4Sstii8+lTa9lPnnWmIGOzCYTJvlFlgB/HnZgc2mDNk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from [127.0.0.2] (unknown [210.73.43.101]) by APP-03 (Coremail) with SMTP id rQCowAAHItlzqq5pnpElCg--.46862S3; Mon, 09 Mar 2026 19:09:41 +0800 (CST) From: Vivian Wang Date: Mon, 09 Mar 2026 19:09:37 +0800 Subject: [PATCH 1/2] riscv: mm: WARN_ON() for bad addresses in vmemmap_populate() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260309-riscv-sparsemem-vmemmap-limits-v1-1-f40efe18e3cd@iscas.ac.cn> References: <20260309-riscv-sparsemem-vmemmap-limits-v1-0-f40efe18e3cd@iscas.ac.cn> In-Reply-To: <20260309-riscv-sparsemem-vmemmap-limits-v1-0-f40efe18e3cd@iscas.ac.cn> To: Paul Walmsley , Palmer Dabbelt , Alexandre Ghiti Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, sophgo@lists.linux.dev, Vivian Wang X-Mailer: b4 0.14.3 X-CM-TRANSID: rQCowAAHItlzqq5pnpElCg--.46862S3 X-Coremail-Antispam: 1UD129KBjvdXoW7Jr4DJw13Zw1kXFyxCw45Wrg_yoWfJFX_G3 say3y8uryru3Z2v3ZF9rn5GryYyws09FnrXF92qwn8G3s8uF1fXrZak3Z7Xr1UWaySvrZa kasrXry0k3WI9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbhkFF20E14v26ryj6rWUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUGwA2048vs2IY02 0Ec7CjxVAFwI0_JFI_Gr1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xv wVC0I7IYx2IY67AKxVW5JVW7JwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwA2z4 x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS0I0E 0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67 AKxVWUJVWUGwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48I cxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY1x0262kKe7AKxVWUAVWUtwCF04 k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r18 MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vIr4 1lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1l IxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4 A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JU2FAJUUUUU= X-CM-SenderInfo: pzdqw2pxlnt03j6l2u1dvotugofq/ Similarly to the same check in arch/arm64/mm/mmu.c, in vmemmap_populate(), add a warning for start and end being outside of the range of vmemmap. Signed-off-by: Vivian Wang --- arch/riscv/mm/init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 811e03786c56..c12590ab3d0e 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -1453,6 +1453,8 @@ int __meminit vmemmap_check_pmd(pmd_t *pmdp, int node, int __meminit vmemmap_populate(unsigned long start, unsigned long end, int= node, struct vmem_altmap *altmap) { + WARN_ON((start < VMEMMAP_START) || (end > VMEMMAP_END)); + /* * Note that SPARSEMEM_VMEMMAP is only selected for rv64 and that we * can't use hugepage mappings for 2-level page table because in case of --=20 2.53.0