linux-kernel - Re: [PATCH 2/2] ath9k: fix ath_tx_process_buffer() potential null ptr dereference

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Date:   Tue, 16 Feb 2021 07:03:36 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Shuah Khan <skhan@...uxfoundation.org>
Cc:     davem@...emloft.net, kuba@...nel.org,
        Shuah Khan <skhan@...uxfoundation.org>,
        ath9k-devel@....qualcomm.com, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ath9k: fix ath_tx_process_buffer() potential null ptr
 dereference

Shuah Khan <skhan@...uxfoundation.org> wrote:

> ath_tx_process_buffer() references ieee80211_find_sta_by_ifaddr()
> return pointer (sta) outside null check. Fix it by moving the code
> block under the null check.
> 
> This problem was found while reviewing code to debug RCU warn from
> ath10k_wmi_tlv_parse_peer_stats_info() and a subsequent manual audit
> of other callers of ieee80211_find_sta_by_ifaddr() that don't hold
> RCU read lock.
> 
> Signed-off-by: Shuah Khan <skhan@...uxfoundation.org>
> Signed-off-by: Kalle Valo <kvalo@...eaurora.org>

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

a56c14bb21b2 ath9k: fix ath_tx_process_buffer() potential null ptr dereference

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/43ed9abb9e8d7112f3cc168c2f8c489e253635ba.1613090339.git.skhan@linuxfoundation.org/

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