From nobody Wed Apr 1 20:39:03 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (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 59C6844DB7F for ; Wed, 1 Apr 2026 16:03:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775059406; cv=none; b=KhTQmXsHoFLsz+ZZAgFg8e5blFOR0ItYkNPObN/0HJlGogsXcF9W+z4Wl3+VQwtI7aOubcHmolgXBQgxB11fgvq6upwNI6WRqEk3szPGg9PvwfqEUC8CJwOyKKwXkQBjWiRw4syvdlzlqNwZOQ3JPLdbhWaZKHqkI2oFjKP1OPk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775059406; c=relaxed/simple; bh=7PwzGN5fibeh61WoTGo3zp+TKg5/vuNiGr4p8H8T3d0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=r16Gfx3by5ysiI5s7PyTNaFH/sGQBkjITtbqT+Ggh9CFgkHcyBSjF9Jt9u0QtRe/l7CKugscRsyFJ8+a4y0wZX8Ox3v/5G4izTQUDEJthq9vmBz9ERKE04AEskt+jad7vVIF4FsNkEsnEdmsZ2u9oz/6kcw1pHSB8QoEPVPxXBI= 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=159.226.251.21 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 localhost.localdomain (unknown [111.196.245.197]) by APP-01 (Coremail) with SMTP id qwCowAB3G2fFQc1pAxXhCw--.37201S2; Thu, 02 Apr 2026 00:03:17 +0800 (CST) From: Pengpeng Hou To: maddy@linux.ibm.com Cc: mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, pengpeng@iscas.ac.cn Subject: [PATCH] powerpc/rtas-proc: reject oversized sensor properties Date: Thu, 2 Apr 2026 00:03:17 +0800 Message-ID: <20260401160317.88585-1-pengpeng@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 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: qwCowAB3G2fFQc1pAxXhCw--.37201S2 X-Coremail-Antispam: 1UD129KBjvdXoWrtF4xXw43Gw4fCF18Kr43GFg_yoWDurb_C3 ZxW3WkCw4vvr4Yv3ZrGF4DGFWDK3yUZFyqvr1ag3yxJ3saqr17JrWUAFn0yrn3Gr4kArWD C3Z5Xrykta4I9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb4kFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Cr0_ Gr1UM28EF7xvwVC2z280aVAFwI0_Jr0_Gr1l84ACjcxK6I8E87Iv6xkF7I0E14v26r4j6r 4UJwAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUAVWUtwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY1x0262kKe7AKxVWU AVWUtwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14 v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkG c2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUCVW8JwCI42IY6xIIjxv20xvEc7CjxVAFwI 0_Cr0_Gr1UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8 JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUO73vUU UUU X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" ppc_rtas_find_all_sensors() derives the number of RTAS sensors from the firmware property length and then copies that many entries into the fixed sensors.sensor[MAX_SENSORS] array. A longer-than-expected property can therefore overrun the static sensor table. Reject rtas-sensors properties that would exceed the fixed sensor table. Signed-off-by: Pengpeng Hou --- arch/powerpc/kernel/rtas-proc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-pro= c.c index f38df72e64b8..97a7d76ecf77 100644 --- a/arch/powerpc/kernel/rtas-proc.c +++ b/arch/powerpc/kernel/rtas-proc.c @@ -437,6 +437,10 @@ static int ppc_rtas_find_all_sensors(void) } =20 sensors.quant =3D len / 8; /* int + int */ + if (sensors.quant > ARRAY_SIZE(sensors.sensor)) { + pr_err("too many sensors reported: %u\n", sensors.quant); + return 1; + } =20 for (i=3D0; i