linux-kernel - Potential NULL pointer deference in iwlwifi: mvm

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 for Android: free password hash cracker in your pocket

[<prev] [next>] [day] [month] [year] [list]

Date:   Wed, 9 Oct 2019 22:02:43 -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>,
        "David S. Miller" <davem@...emloft.net>,
        Avigail Grinstein <avigail.grinstein@...el.com>,
        Haim Dreyfuss <haim.dreyfuss@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Potential NULL pointer deference in iwlwifi: mvm

Hi All:

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

The function iwl_mvm_vif_from_mac80211() could return NULL,
but some callers in this file does not check the return value while
directly dereference it, which seems potentially unsafe.
Such callers include iwl_mvm_update_d0i3_power_mode(),
iwl_mvm_power_configure_uapsd(),
iwl_mvm_power_allow_uapsd(), etc.



-- 
Kind Regards,

Yizhuo Zhai

Computer Science, Graduate Student
University of California, Riverside