Search Linux Wireless

bug in commit: mac80211: Fix possible sband related NULL pointer de-reference

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Author: Mohammed Shafi Shajakhan <mohammed@xxxxxxxxxxxxxxxx>
Date:   Thu Apr 27 12:45:38 2017 +0530

    mac80211: Fix possible sband related NULL pointer de-reference

    Existing API 'ieee80211_get_sdata_band' returns default 2 GHz band even
    if the channel context configuration is NULL. This crashes for chipsets
    which support 5 Ghz alone when it tries to access members of 'sband'.
    Channel context configuration can be NULL in multivif case and when
    channel switch is in progress (or) when it fails. Fix this by replacing
    the API 'ieee80211_get_sdata_band' with  'ieee80211_get_sband' which
    returns a NULL pointer for sband when the channel configuration is NULL.

...

This commit appears to break  sta_set_rate_info_tx on drivers that are not using chantx,
because it calls ieee80211_get_sband, which does a WARN_ON when there is no chantx.

Any idea how to make this work for chandef drivers?

Thanks,
Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com




[Index of Archives]     [Linux Host AP]     [ATH6KL]     [Linux Wireless Personal Area Network]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Linux Kernel]     [IDE]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite Hiking]     [MIPS Linux]     [ARM Linux]     [Linux RAID]

  Powered by Linux