[ Upstream commit 221c46d28957bd6e2158abc2179ce4a8c9ce07d3 ]

The headers describing a number of network packets do not have the
correct endian settings for several types of data.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

[ Upstream commit 6e017006022abfea5d2466cad936065f45763ad1 ]

gcc-7 detects that wlanhdr_to_ethhdr() in two drivers calls memcpy() with
a destination argument that an earlier function call may have set to NULL:

staging/rtl8188eu/core/rtw_recv.c: In function 'wlanhdr_to_ethhdr':
staging/rtl8188eu/core/rtw_recv.c:1318:2: warning: argument 1 null where non-null expected [-Wnonnull]
staging/rtl8712/rtl871x_recv.c: In function 'r8712_wlanhdr_to_ethhdr':
staging/rtl8712/rtl871x_recv.c:649:2: warning: argument 1 null where non-null expected [-Wnonnull]

I'm fixing this by adding a NULL pointer check and returning failure
from the function, which is hopefully already handled properly.

This seems to date back to when the drivers were originally added,
so backporting the fix to stable seems appropriate. There are other
related realtek drivers in the kernel, but none of them contain a
function with a similar name or produce this warning.

Cc: stable@vger.kernel.org
Fixes: 1cc18a22b96b ("staging: r8188eu: Add files for new driver - part 5")
Fixes: 2865d42c78a9 ("staging: r8712u: Add the new driver to the mainline kernel")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

commit 1e6e63283691a2a9048a35d9c6c59cf0abd342e4 upstream.

This adds the USB ID for the Sitecom WLA2100. The Windows 10 inf file
was checked to verify that the addition is correct.

Reported-by: Frans van de Wiel <fvdw@fvdw.eu>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Frans van de Wiel <fvdw@fvdw.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit cab462140f8a183e3cca0b51c8b59ef715cb6148 upstream.

With an RTL8191SU USB adaptor, sometimes the hints for a fragmented
packet are set, but the packet length is too large. Allocate enough
space to prevent memory corruption and a resulting kernel panic [1].

[1] http://www.spinics.net/lists/linux-wireless/msg136546.html

Signed-off-by: Haggai Eran <haggai.eran@gmail.com>
ACKed-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

del_timer_sync() is not to be called in the interrupt context unless
the timer is irqsafe. but most of the functions where commits
6501c8e7d86cca5f and 382d020f4459cd77 touched were called in interrupt
context. And as a result the WARN_ON was getting triggered. Changed
to del_timer() in places which were called from interrupt.

Fixes: 382d020f4459cd77 ("Staging: rtl8712: Eliminate use of _cancel_timer"
Fixes: 6501c8e7d86cca5f ("Staging: rtl8712: Eliminate use of _cancel_timer_ex")
Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=97711
Reported-by: Arek Rusniak <arek.rusi@gmail.com>
Tested-by: Arek Rusniak <arek.rusi@gmail.com>
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

If memdup_user() fails then "pparmbuf" is an error pointer and we can't
pass it to kfree().  I changed the "goto _r871x_mp_ioctl_hdl_exit" to a
direct return.

I changed the earlier goto to a direct return as well for consistency
and removed the "pparmbuf = NULL" initializer since it's no longer
needed.

Fixes: 45de432775d6 ('Staging: rtl8712: Use memdup_user() instead of copy_from_user()')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

The result of netdev_priv is already implicitly cast to the type of the
left side of the assignment.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
type T;
T *x;
@@

x =
- (T *)
  netdev_priv(...)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Removes variable comparison with 0 by using !. Done using following
coccinelle script.

@ disable is_zero,isnt_zero @
expression *E;
expression E1,f;
@@

E = f(...)
<...
(
- E == 0
+ !E
|
- E != 0
+ E
|
- 0 == E
+ !E
|
- 0 != E
+ E
)
...>
?E = E1

@ disable is_zero,isnt_zero @
expression *E;
@@

(
  E ==
- 0
+ NULL
|
  E !=
- 0
+ NULL
|
- 0
+ NULL
  == E
|
- 0
+ NULL
  != E
)

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Delete duplicated argument to | for the state argument in
the _clr_fwstate_() function call as it is redundant.
Detected with coccinelle.

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Use memdup_user() to avoid its duplicated implementation and simplify
code. memdup_user() uses GFP_KERNEL instead of GFP_ATOMIC,
which is valid because copy_from_user() might sleep and it's useless
to make the allocation atomic. Found with coccinelle.

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>