linux-kernel - Potential NULL pointer deference in iwlwifi

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Date:   Mon, 7 Oct 2019 12:14:37 -0700
From:   Yizhuo Zhai <yzhai003@....edu>
To:     Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Intel Linux Wireless <linuxwifi@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Haim Dreyfuss <haim.dreyfuss@...el.com>,
        Avigail Grinstein <avigail.grinstein@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Zhiyun Qian <zhiyunq@...ucr.edu>,
        Chengyu Song <csong@...ucr.edu>
Subject: Potential NULL pointer deference in iwlwifi

Hi All:

drivers/net/wireless/intel/iwlwifi/mvm/power.c:

Inside function iwl_mvm_power_ps_disabled_iterator(),
iwl_mvm_vif_from_mac80211()
could return NULL,however, the return value of
iwl_mvm_vif_from_mac80211() is not
checked and get
used. This could potentially be unsafe.

-- 
Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside