linux.git/net/wireless, branch v4.7-rc6

cfg80211: fix proto in ieee80211_data_to_8023 for frames without LLC header

2016-06-29T09:50:33+00:00

The PDU length of incoming LLC frames is set to the total skb payload size
in __ieee80211_data_to_8023() of net/wireless/util.c which incorrectly
includes the length of the IEEE 802.11 header.

The resulting LLC frame header has a too large PDU length, causing the
llc_fixup_skb() function of net/llc/llc_input.c to reject the incoming
skb, effectively breaking STP.

Solve the problem by properly substracting the IEEE 802.11 frame header size
from the PDU length, allowing the LLC processor to pick up the incoming
control messages.

Special thanks to Gerry Rozema for tracking down the regression and proposing
a suitable patch.

Fixes: 2d1c304cb2d5 ("cfg80211: add function for 802.3 conversion with separate output buffer")
Cc: stable@vger.kernel.org
Reported-by: Gerry Rozema 
Signed-off-by: Felix Fietkau 
Signed-off-by: Johannes Berg

wext: Fix 32 bit iwpriv compatibility issue with 64 bit Kernel

2016-06-09T07:56:11+00:00

iwpriv app uses iw_point structure to send data to Kernel. The iw_point
structure holds a pointer. For compatibility Kernel converts the pointer
as required for WEXT IOCTLs (SIOCIWFIRST to SIOCIWLAST). Some drivers
may use iw_handler_def.private_args to populate iwpriv commands instead
of iw_handler_def.private. For those case, the IOCTLs from
SIOCIWFIRSTPRIV to SIOCIWLASTPRIV will follow the path ndo_do_ioctl().
Accordingly when the filled up iw_point structure comes from 32 bit
iwpriv to 64 bit Kernel, Kernel will not convert the pointer and sends
it to driver. So, the driver may get the invalid data.

The pointer conversion for the IOCTLs (SIOCIWFIRSTPRIV to
SIOCIWLASTPRIV), which follow the path ndo_do_ioctl(), is mandatory.
This patch adds pointer conversion from 32 bit to 64 bit and vice versa,
if the ioctl comes from 32 bit iwpriv to 64 bit Kernel.

Cc: stable@vger.kernel.org
Signed-off-by: Prasun Maiti 
Signed-off-by: Ujjal Roy 
Tested-by: Dibyajyoti Ghosh 
Signed-off-by: Johannes Berg

cfg80211: remove get/set antenna and tx power warnings

2016-06-09T07:44:56+00:00

Since set_tx_power and set_antenna are frequently implemented
without the matching get_tx_power/get_antenna, we shouldn't
have added warnings for those. Remove them.

The remaining ones are correct and need to be implemented
symmetrically for correct operation.

Cc: stable@vger.kernel.org
Fixes: de3bb771f471 ("cfg80211: add more warnings for inconsistent ops")
Signed-off-by: Johannes Berg

mm/page_ref: use page_ref helper instead of direct modification of _count

2016-05-20T02:12:14+00:00

page_reference manipulation functions are introduced to track down
reference count change of the page.  Use it instead of direct
modification of _count.

Signed-off-by: Joonsoo Kim 
Acked-by: Vlastimil Babka 
Cc: Hugh Dickins 
Cc: Johannes Berg 
Cc: "David S. Miller" 
Cc: Sunil Goutham 
Cc: Chris Metcalf 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cfg80211: make wdev_list accessible to drivers

2016-05-12T09:16:40+00:00

There's no harm in having drivers read the list, since they can
use RCU protection or RTNL locking; allow this to not require
each and every driver to also implement its own bookkeeping.

Signed-off-by: Johannes Berg

cfg80211: remove erroneous comment

2016-05-12T09:16:24+00:00

The devlist_mtx mutex was removed about two years ago, in favour of just
using RTNL/RCU protection. Remove the comment still referencing it.

Signed-off-by: Johannes Berg

cfg80211: allow finding vendor with OUI without specifying the OUI type

2016-05-12T09:15:42+00:00

This allows finding vendor IE from a specific vendor.

Signed-off-by: Emmanuel Grumbach 
Signed-off-by: Luca Coelho 
Signed-off-by: Johannes Berg

wext: remove a/b/g/n from SIOCGIWNAME

2016-05-02T20:48:09+00:00

Since a/b/g/n no longer exist as spec amendements and VHT (ex 802.11ac)
wasn't handled at all, it's better to just remove the amendment strings
to avoid confusion.

Signed-off-by: Johannes Berg 
Reviewed-by: Luca Coelho 
Signed-off-by: Johannes Berg

nl80211: use nla_put_u64_64bit() for the remaining u64 attributes

2016-04-27T09:01:13+00:00

Nicolas converted most users, but didn't realize some were generated
by macros. Convert those over as well.

Signed-off-by: Johannes Berg 
Acked-by: Nicolas Dichtel 
Signed-off-by: Johannes Berg

cfg80211: Add option to report the bss entry in connect result

2016-04-26T07:40:12+00:00

Since cfg80211 maintains separate BSS table entries for APs if the same
BSSID, SSID pair is seen on multiple channels, it is possible that it
can map the current_bss to a BSS entry on the wrong channel. This
current_bss will not get flushed unless disconnected and cfg80211
reports a wrong channel as the associated channel.

Fix this by introducing a new cfg80211_connect_bss() function which is
similar to cfg80211_connect_result(), but it includes an additional
parameter: the bss the STA is connected to. This allows drivers to
provide the exact bss entry that matches the BSS to which the connection
was completed.

Reviewed-by: Jouni Malinen 
Signed-off-by: Vidyullatha Kanchanapally 
Signed-off-by: Sunil Dutt 
Signed-off-by: Johannes Berg