linux-kernel - [bug report] phy: apple: Add Apple Type-C PHY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aYXvX1bYOXtYCgfC@stanley.mountain>
Date: Fri, 6 Feb 2026 16:40:47 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Sven Peter <sven@...nel.org>
Cc: Neal Gompa <neal@...pa.dev>, Neil Armstrong <neil.armstrong@...aro.org>,
	asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-phy@...ts.infradead.org,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [bug report] phy: apple: Add Apple Type-C PHY

[ Smatch checking is paused while we raise funding.  #SadFace
  https://lore.kernel.org/all/aTaiGSbWZ9DJaGo7@stanley.mountain/ -dan ]

Hello Sven Peter,

Commit 8e98ca1e74db ("phy: apple: Add Apple Type-C PHY") from Dec 14,
2025 (linux-next), leads to the following Smatch static checker
warning:

	drivers/phy/apple/atc.c:2209 atcphy_map_resources()
	warn: 'resources[i]->addr' isn't an ERR_PTR

drivers/phy/apple/atc.c
    2191 static int atcphy_map_resources(struct platform_device *pdev, struct apple_atcphy *atcphy)
    2192 {
    2193         struct {
    2194                 const char *name;
    2195                 void __iomem **addr;
    2196                 struct resource **res;
    2197         } resources[] = {
    2198                 { "core", &atcphy->regs.core, &atcphy->res.core },
    2199                 { "lpdptx", &atcphy->regs.lpdptx, NULL },
    2200                 { "axi2af", &atcphy->regs.axi2af, &atcphy->res.axi2af },
    2201                 { "usb2phy", &atcphy->regs.usb2phy, NULL },
    2202                 { "pipehandler", &atcphy->regs.pipehandler, NULL },
    2203         };
    2204         struct resource *res;
    2205 
    2206         for (int i = 0; i < ARRAY_SIZE(resources); i++) {
    2207                 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, resources[i].name);
    2208                 *resources[i].addr = devm_ioremap_resource(&pdev->dev, res);
--> 2209                 if (IS_ERR(resources[i].addr))

This is checking the wrong variable.  The * is missing.
if (IS_ERR(*resources[i].addr)) {

    2210                         return dev_err_probe(atcphy->dev, PTR_ERR(resources[i].addr),
    2211                                              "Unable to map %s regs", resources[i].name);
    2212 
    2213                 if (resources[i].res)
    2214                         *resources[i].res = res;
    2215         }
    2216 
    2217         return 0;
    2218 }

regards,
dan carpenter