1. 04 4月, 2015 5 次提交
  2. 03 4月, 2015 12 次提交
  3. 02 4月, 2015 20 次提交
  4. 01 4月, 2015 3 次提交
    • J
      mac80211: fix RX A-MPDU session reorder timer deletion · 788211d8
      Johannes Berg 提交于
      There's an issue with the way the RX A-MPDU reorder timer is
      deleted that can cause a kernel crash like this:
      
       * tid_rx is removed - call_rcu(ieee80211_free_tid_rx)
       * station is destroyed
       * reorder timer fires before ieee80211_free_tid_rx() runs,
         accessing the station, thus potentially crashing due to
         the use-after-free
      
      The station deletion is protected by synchronize_net(), but
      that isn't enough -- ieee80211_free_tid_rx() need not have
      run when that returns (it deletes the timer.) We could use
      rcu_barrier() instead of synchronize_net(), but that's much
      more expensive.
      
      Instead, to fix this, add a field tracking that the session
      is being deleted. In this case, the only re-arming of the
      timer happens with the reorder spinlock held, so make that
      code not rearm it if the session is being deleted and also
      delete the timer after setting that field. This ensures the
      timer cannot fire after ___ieee80211_stop_rx_ba_session()
      returns, which fixes the problem.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
      788211d8
    • S
      x86/reboot: Add ASRock Q1900DC-ITX mainboard reboot quirk · 80313b30
      Stefan Lippers-Hollmann 提交于
      The ASRock Q1900DC-ITX mainboard (Baytrail-D) hangs randomly in
      both BIOS and UEFI mode while rebooting unless reboot=pci is
      used. Add a quirk to reboot via the pci method.
      
      The problem is very intermittent and hard to debug, it might succeed
      rebooting just fine 40 times in a row - but fails half a dozen times
      the next day. It seems to be slightly less common in BIOS CSM mode
      than native UEFI (with the CSM disabled), but it does happen in either
      mode. Since I've started testing this patch in late january, rebooting
      has been 100% reliable.
      
      Most of the time it already hangs during POST, but occasionally it
      might even make it through the bootloader and the kernel might even
      start booting, but then hangs before the mode switch. The same symptoms
      occur with grub-efi, gummiboot and grub-pc, just as well as (at least)
      kernel 3.16-3.19 and 4.0-rc6 (I haven't tried older kernels than 3.16).
      Upgrading to the most current mainboard firmware of the ASRock
      Q1900DC-ITX, version 1.20, does not improve the situation.
      
      ( Searching the web seems to suggest that other Bay Trail-D mainboards
        might be affected as well. )
      --
      Signed-off-by: NStefan Lippers-Hollmann <s.l-h@gmx.de>
      Cc: <stable@vger.kernel.org>
      Cc: Matt Fleming <matt.fleming@intel.com>
      Link: http://lkml.kernel.org/r/20150330224427.0fb58e42@mirSigned-off-by: NIngo Molnar <mingo@kernel.org>
      80313b30
    • S
      Fix warning · 4c5930e8
      Steve French 提交于
      Coverity reports a warning due to unitialized attr structure in one
      code path.
      
      Reported by Coverity (CID 728535)
      Signed-off-by: NSteve French <smfrench@gmail.com>
      Reviewed-by: NJeff Layton <jlayton@samba.org>
      4c5930e8