netdev - Re: [PATCH] ath11k: fix a double free and a memory leak

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]

Date:   Tue, 8 Sep 2020 05:44:59 +0000
From:   Kalle Valo <kvalo@...eaurora.org>
To:     trix@...hat.com
Cc:     davem@...emloft.net, kuba@...nel.org, natechancellor@...il.com,
        ndesaulniers@...gle.com, mkenna@...eaurora.org,
        vnaralas@...eaurora.org, rmanohar@...eaurora.org, john@...ozen.org,
        ath11k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com, Tom Rix <trix@...hat.com>
Subject: Re: [PATCH] ath11k: fix a double free and a memory leak

trix@...hat.com wrote:

> clang static analyzer reports this problem
> 
> mac.c:6204:2: warning: Attempt to free released memory
>         kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels);
>         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> The channels pointer is allocated in ath11k_mac_setup_channels_rates()
> When it fails midway, it cleans up the memory it has already allocated.
> So the error handling needs to skip freeing the memory.
> 
> There is a second problem.
> ath11k_mac_setup_channels_rates(), allocates 3 channels. err_free
> misses releasing ar->mac.sbands[NL80211_BAND_6GHZ].channels
> 
> Fixes: d5c65159f289 ("ath11k: driver for Qualcomm IEEE 802.11ax devices")
> Signed-off-by: Tom Rix <trix@...hat.com>
> Signed-off-by: Kalle Valo <kvalo@...eaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

7e8453e35e40 ath11k: fix a double free and a memory leak

-- 
https://patchwork.kernel.org/patch/11759745/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches