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| author | Zhu Yi | 2010-01-26 08:58:57 +0100 |
|---|---|---|
| committer | John W. Linville | 2010-01-26 17:52:13 +0100 |
| commit | 3092ad054406f069991ca561adc74f2d9fbb6867 (patch) | |
| tree | 498446eccd918d1fb4655a70422210c0c4d63394 /drivers/net/wireless | |
| parent | ath9k: fix eeprom INI values override for 2GHz-only cards (diff) | |
| download | kernel-qcow2-linux-3092ad054406f069991ca561adc74f2d9fbb6867.tar.gz kernel-qcow2-linux-3092ad054406f069991ca561adc74f2d9fbb6867.tar.xz kernel-qcow2-linux-3092ad054406f069991ca561adc74f2d9fbb6867.zip | |
mac80211: fix NULL pointer dereference when ftrace is enabled
I got below kernel oops when I try to bring down the network interface if
ftrace is enabled. The root cause is drv_ampdu_action() is passed with a
NULL ssn pointer in the BA session tear down case. We need to check and
avoid dereferencing it in trace entry assignment.
BUG: unable to handle kernel NULL pointer dereference
Modules linked in: at (null)
IP: [<f98fe02a>] ftrace_raw_event_drv_ampdu_action+0x10a/0x160 [mac80211]
*pde = 00000000
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[...]
Call Trace:
[<f98fdf20>] ? ftrace_raw_event_drv_ampdu_action+0x0/0x160 [mac80211]
[<f98dac4c>] ? __ieee80211_stop_rx_ba_session+0xfc/0x220 [mac80211]
[<f98d97fb>] ? ieee80211_sta_tear_down_BA_sessions+0x3b/0x50 [mac80211]
[<f98dc6f6>] ? ieee80211_set_disassoc+0xe6/0x230 [mac80211]
[<f98dc6ac>] ? ieee80211_set_disassoc+0x9c/0x230 [mac80211]
[<f98dcbb8>] ? ieee80211_mgd_deauth+0x158/0x170 [mac80211]
[<f98e4bdb>] ? ieee80211_deauth+0x1b/0x20 [mac80211]
[<f8987f49>] ? __cfg80211_mlme_deauth+0xe9/0x120 [cfg80211]
[<f898b870>] ? __cfg80211_disconnect+0x170/0x1d0 [cfg80211]
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: stable@kernel.org
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
0 files changed, 0 insertions, 0 deletions