linux-kernel - Re: [PATCH v2] wifi: mt76: mt7915: Fix null-ptr-deref in mt7915_mmio_wed

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] [day] [month] [year] [list]

Message-ID: <946ab07c-47d0-443a-9ece-2ce65d586bef@web.de>
Date: Mon, 7 Apr 2025 10:00:23 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: Henry Martin <bsdhenrymartin@...il.com>, linux-wireless@...r.kernel.org,
 linux-mediatek@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org
Cc: LKML <linux-kernel@...r.kernel.org>,
 Angelo Gioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Chad Monroe <chad@...roe.io>, Felix Fietkau <nbd@....name>,
 Lorenzo Bianconi <lorenzo@...nel.org>,
 Matthias Brugger <matthias.bgg@...il.com>,
 Peter Chiu <chui-hao.chiu@...iatek.com>, Ryder Lee <ryder.lee@...iatek.com>,
 Sean Wang <sean.wang@...iatek.com>, Shayne Chen <shayne.chen@...iatek.com>,
 Shengyu Qu <wiagn233@...look.com>
Subject: Re: [PATCH v2] wifi: mt76: mt7915: Fix null-ptr-deref in
 mt7915_mmio_wed_init()

…
> Prevent null pointer dereference in mt7915_mmio_wed_init().

Can any other summary phrase variant become more desirable accordingly?


…
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mmio.c
…
> @@ -678,6 +681,9 @@ int mt7915_mmio_wed_init(struct mt7915_dev *dev, void *pdev_ptr,
>  		wed->wlan.bus_type = MTK_WED_BUS_AXI;
>  		wed->wlan.base = devm_ioremap(dev->mt76.dev, res->start,
>  					      resource_size(res));
> +		if (!wed->wlan.base)
> +			return -ENOMEM;
> +
…

Would the function “devm_platform_get_and_ioremap_resource” be applicable
in this else branch?
https://elixir.bootlin.com/linux/v6.14-rc6/source/drivers/base/platform.c#L87

Regards,
Markus