From nobody Sat Apr 4 01:35:09 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (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 A51F61684A4 for ; Sun, 22 Mar 2026 03:19:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774149576; cv=none; b=ukOtyCJrnlkxUfw8wIrZaTlD68/WcynFYvTpjNqyE6oH/Y79658iRNFjRx+5VlnqqaK6zfFLAltZyGMpA7mE6w9apH8H5nVt2EROoPtuIkfUQIgMNgTZbgBu0jS9w/QwNlXwiEkGHXs5O3xeM/pcB0ootOm/XWB4onJZv/wzykc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774149576; c=relaxed/simple; bh=Fj/N8DrAWDBFTuxEt7FC2TBQ6TI5IsLU9SdE7qfsbWU=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=VV5gz1Z0isC1ptmSRtJuDXvHnebmUuEcfLfpbu12XfWp8b1IgMpexYqcyr9YxpUBD49zhMJVxRKv4MMLoojXZL1Y/7QHWhVVuSuIniVqCjkYoIPB9RTU7OBNCQtvAzcwJzOwGQwMbOaSk3gnXOcDhF3ypMP2BHI+DcjmgjOr0EY= 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=159.226.251.25 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-05 (Coremail) with SMTP id zQCowACHFQm7X79pz08eCw--.34039S2; Sun, 22 Mar 2026 11:19:23 +0800 (CST) From: Pengpeng Hou To: linux-kernel@vger.kernel.org Cc: pengpeng@iscas.ac.cn, Romain Gantois , Arnd Bergmann , Greg Kroah-Hartman Subject: [PATCH] misc: ti_fpc202: fix port ID bounds check Date: Sun, 22 Mar 2026 11:19:23 +0800 Message-ID: <20260322031923.57994-1-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: zQCowACHFQm7X79pz08eCw--.34039S2 X-Coremail-Antispam: 1UD129KBjvdXoW7Jry5ArWxWr1xAr4rKr4Durg_yoWDtwc_CF 4Sqr17Z39xCFyrur15AF1fZryvy3yYgF4fZr4UtrsIqasxWwnxXrWDu3Z8ZF4DCa1kuF9r CrWDX34Ikw17WjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUb4xFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v26F4UJV W0owAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0 I7IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r 4UM4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwCY1x0262kKe7AKxVWU AVWUtwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14 v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkG c2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4U MIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUDpnQUUU UU= X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" The probe path accepts `port_id =3D=3D FPC202_NUM_PORTS` even though the driver stores per-port state in `addr_caches[2][2]` and `probed_ports` is indexed by the same range. That lets a device-tree node with `reg =3D <2>` flow into `fpc202_write_dev_addr()` and `fpc202_detach_addr()`, where the driver indexes `addr_caches[port_id][dev_num]`. Change the probe check to reject port ID values at or above the number of supported ports. Signed-off-by: Pengpeng Hou --- drivers/misc/ti_fpc202.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/ti_fpc202.c b/drivers/misc/ti_fpc202.c index 8eb2b5ac9850..578feefb77f1 100644 --- a/drivers/misc/ti_fpc202.c +++ b/drivers/misc/ti_fpc202.c @@ -366,7 +366,7 @@ static int fpc202_probe(struct i2c_client *client) goto unregister_chans; } =20 - if (port_id > FPC202_NUM_PORTS) { + if (port_id >=3D FPC202_NUM_PORTS) { dev_err(dev, "port ID %d is out of range!\n", port_id); ret =3D -EINVAL; goto unregister_chans; --=20 2.50.1 (Apple Git-155)