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author | Luis Felipe Dominguez Vega | 2015-07-30 04:11:20 +0200 |
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committer | Kalle Valo | 2015-07-31 08:25:35 +0200 |
commit | 7c62940165e9ae4004ce4e6b5117330bab94df68 (patch) | |
tree | f894a32e7768d5525bb6cc18a9bd946efd88e166 /drivers/net/wireless/rtlwifi/rtl8723be/sw.c | |
parent | b43: fix extpa_gain check for 2GHz (diff) | |
download | kernel-qcow2-linux-7c62940165e9ae4004ce4e6b5117330bab94df68.tar.gz kernel-qcow2-linux-7c62940165e9ae4004ce4e6b5117330bab94df68.tar.xz kernel-qcow2-linux-7c62940165e9ae4004ce4e6b5117330bab94df68.zip |
rtlwifi: Fix NULL dereference when PCI driver used as an AP
In commit 33511b157bbcebaef853cc1811992b664a2e5862 ("rtlwifi: add support to
send beacon frame"), the mechanism for sending beacons was established. That
patch works correctly for rtl8192cu, but there is a possibility of getting
the following warnings in the PCI drivers:
WARNING: CPU: 1 PID: 2439 at net/mac80211/driver-ops.h:12
ieee80211_bss_info_change_notify+0x179/0x1d0 [mac80211]()
wlp5s0: Failed check-sdata-in-driver check, flags: 0x0
The warning is followed by a NULL pointer dereference as follows:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000006
IP: [<ffffffffc073998e>] rtl_get_tcb_desc+0x5e/0x760 [rtlwifi]
This problem was reported at http://thread.gmane.org/gmane.linux.kernel.wireless.general/138645,
but no solution was found at that time.
The problem was also reported at https://bugzilla.kernel.org/show_bug.cgi?id=9744
and this solution was developed and tested there.
The USB driver works with a NULL final argument in the adapter_tx() callback;
however, the PCI drivers need a struct rtl_tcb_desc in that position.
Fixes: 33511b157bbc ("rtlwifi: add support to send beacon frame.")
Signed-off-by: Luis Felipe Dominguez Vega <lfdominguez@nauta.cu>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org> [3.19+]
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/rtlwifi/rtl8723be/sw.c')
0 files changed, 0 insertions, 0 deletions