linux-kernel - Coverity: mt7921_check_offload

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Date:   Fri, 2 Dec 2022 14:21:46 -0800
From:   coverity-bot <keescook@...omium.org>
To:     Sean Wang <sean.wang@...iatek.com>
Cc:     YN Chen <YN.Chen@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        linux-wireless@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Kalle Valo <kvalo@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Shayne Chen <shayne.chen@...iatek.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Leon Yen <leon.yen@...iatek.com>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        Deren Wu <deren.wu@...iatek.com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Johannes Berg <johannes.berg@...el.com>,
        Quan Zhou <quan.zhou@...iatek.com>,
        linux-mediatek@...ts.infradead.org, Felix Fietkau <nbd@....name>,
        "David S. Miller" <davem@...emloft.net>,
        linux-kernel@...r.kernel.org, Paolo Abeni <pabeni@...hat.com>,
        Ben Greear <greearb@...delatech.com>,
        Ming Yen Hsieh <mingyen.hsieh@...iatek.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        linux-next@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Coverity: mt7921_check_offload_capability(): Resource leaks

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20221202 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:

  Thu Dec 1 17:29:13 2022 +0100
    034ae28b56f1 ("wifi: mt76: mt7921: introduce remain_on_channel support")

Coverity reported the following:

*** CID 1527806:  Resource leaks  (RESOURCE_LEAK)
drivers/net/wireless/mediatek/mt76/mt7921/init.c:178 in mt7921_check_offload_capability()
172     	ret = request_firmware(&fw, fw_wm, dev);
173     	if (ret)
174     		return ret;
175
176     	if (!fw || !fw->data || fw->size < sizeof(*hdr)) {
177     		dev_err(dev, "Invalid firmware\n");
vvv     CID 1527806:  Resource leaks  (RESOURCE_LEAK)
vvv     Variable "fw" going out of scope leaks the storage it points to.
178     		return -EINVAL;
179     	}
180
181     	data = fw->data;
182     	hdr = (const void *)(fw->data + fw->size - sizeof(*hdr));
183

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <keescook+coverity-bot@...omium.org>
Addresses-Coverity-ID: 1527806 ("Resource leaks")
Fixes: 034ae28b56f1 ("wifi: mt76: mt7921: introduce remain_on_channel support")

Thanks for your attention!

-- 
Coverity-bot