linux-toradex.git/net/wireless, branch v3.2.74

nl80211: ignore HT/VHT capabilities without QoS/WMM

2015-05-09T22:16:30+00:00

commit 496fcc294daab18799e190c0264863d653588d1f upstream.

As HT/VHT depend heavily on QoS/WMM, it's not a good idea to
let userspace add clients that have HT/VHT but not QoS/WMM.
Since it does so in certain cases we've observed (client is
using HT IEs but not QoS/WMM) just ignore the HT/VHT info at
this point and don't pass it down to the drivers which might
unconditionally use it.

Signed-off-by: Johannes Berg 
[bwh: Backported to 3.2:
 - Adjust context
 - VHT is not supported]
Signed-off-by: Ben Hutchings

nl80211: fix per-station group key get/del and memory leak

2015-02-20T00:49:39+00:00

commit 0fa7b39131576dd1baa6ca17fca53c65d7f62249 upstream.

In case userspace attempts to obtain key information for or delete a
unicast key, this is currently erroneously rejected unless the driver
sets the WIPHY_FLAG_IBSS_RSN flag. Apparently enough drivers do so it
was never noticed.

Fix that, and while at it fix a potential memory leak: the error path
in the get_key() function was placed after allocating a message but
didn't free it - move it to a better place. Luckily admin permissions
are needed to call this operation.

Fixes: e31b82136d1ad ("cfg80211/mac80211: allow per-station GTKs")
Signed-off-by: Johannes Berg 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings

nl80211: clear skb cb before passing to netlink

2014-11-05T20:27:44+00:00

commit bd8c78e78d5011d8111bc2533ee73b13a3bd6c42 upstream.

In testmode and vendor command reply/event SKBs we use the
skb cb data to store nl80211 parameters between allocation
and sending. This causes the code for CONFIG_NETLINK_MMAP
to get confused, because it takes ownership of the skb cb
data when the SKB is handed off to netlink, and it doesn't
explicitly clear it.

Clear the skb cb explicitly when we're done and before it
gets passed to netlink to avoid this issue.

Reported-by: Assaf Azulay 
Reported-by: David Spinadel 
Signed-off-by: Johannes Berg 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings

radiotap: fix bitmap-end-finding buffer overrun

2014-02-15T19:20:13+00:00

commit bd02cd2549cfcdfc57cb5ce57ffc3feb94f70575 upstream.

Evan Huus found (by fuzzing in wireshark) that the radiotap
iterator code can access beyond the length of the buffer if
the first bitmap claims an extension but then there's no
data at all. Fix this.

Reported-by: Evan Huus 
Signed-off-by: Johannes Berg 
Signed-off-by: Ben Hutchings

wireless: radiotap: fix parsing buffer overrun

2013-11-28T14:02:04+00:00

commit f5563318ff1bde15b10e736e97ffce13be08bc1a upstream.

When parsing an invalid radiotap header, the parser can overrun
the buffer that is passed in because it doesn't correctly check
 1) the minimum radiotap header size
 2) the space for extended bitmaps

The first issue doesn't affect any in-kernel user as they all
check the minimum size before calling the radiotap function.
The second issue could potentially affect the kernel if an skb
is passed in that consists only of the radiotap header with a
lot of extended bitmaps that extend past the SKB. In that case
a read-only buffer overrun by at most 4 bytes is possible.

Fix this by adding the appropriate checks to the parser.

Reported-by: Evan Huus 
Signed-off-by: Johannes Berg 
Signed-off-by: Ben Hutchings

nl80211: fix mgmt tx status and testmode reporting for netns

2013-09-10T00:57:10+00:00

commit a0ec570f4f69c4cb700d743a915096c2c8f56a99 upstream.

These two events were sent to the default network
namespace.

This caused AP mode in a non-default netns to not
work correctly. Mgmt tx status was multicasted to
a different (default) netns instead of the one the
AP was in.

Signed-off-by: Michal Kazior 
Signed-off-by: Johannes Berg 
Signed-off-by: Ben Hutchings

cfg80211: check wdev->netdev in connection work

2013-06-19T01:16:38+00:00

commit c815797663b72e3ac1736f1886538152bc48e4af upstream.

If a P2P-Device is present and another virtual interface triggers
the connection work, the system crash because it tries to check
if the P2P-Device's netdev (which doesn't exist) is up. Skip any
wdevs that have no netdev to fix this.

Reported-by: YanBo 
Signed-off-by: Johannes Berg 
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings

wireless: regulatory: fix channel disabling race condition

2013-05-13T14:02:19+00:00

commit 990de49f74e772b6db5208457b7aa712a5f4db86 upstream.

When a full scan 2.4 and 5 GHz scan is scheduled, but then the 2.4 GHz
part of the scan disables a 5.2 GHz channel due to, e.g. receiving
country or frequency information, that 5.2 GHz channel might already
be in the list of channels to scan next. Then, when the driver checks
if it should do a passive scan, that will return false and attempt an
active scan. This is not only wrong but can also lead to the iwlwifi
device firmware crashing since it checks regulatory as well.

Fix this by not setting the channel flags to just disabled but rather
OR'ing in the disabled flag. That way, even if the race happens, the
channel will be scanned passively which is still (mostly) correct.

Signed-off-by: Johannes Berg 
Signed-off-by: Ben Hutchings

wireless: allow 40 MHz on world roaming channels 12/13

2012-12-06T11:20:05+00:00

commit 43c771a1963ab461a2f194e3c97fded1d5fe262f upstream.

When in world roaming mode, allow 40 MHz to be used
on channels 12 and 13 so that an AP that is, e.g.,
using HT40+ on channel 9 (in the UK) can be used.

Reported-by: Eddie Chapman 
Tested-by: Eddie Chapman 
Acked-by: Luis R. Rodriguez 
Signed-off-by: Johannes Berg 
Signed-off-by: Ben Hutchings

mac80211: verify that skb data is present

2012-11-16T16:46:58+00:00

commit 9b395bc3be1cebf0144a127c7e67d56dbdac0930 upstream.

A number of places in the mesh code don't check that
the frame data is present and in the skb header when
trying to access. Add those checks and the necessary
pskb_may_pull() calls. This prevents accessing data
that doesn't actually exist.

To do this, export ieee80211_get_mesh_hdrlen() to be
able to use it in mac80211.

Signed-off-by: Johannes Berg 
Signed-off-by: Ben Hutchings