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701c2be03a
=================================================== [ INFO: suspicious rcu_dereference_check() usage. ] --------------------------------------------------- net/mac80211/sta_info.c:125 invoked rcu_dereference_check() without protection! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 5 locks held by wpa_supplicant/468: #0: (rtnl_mutex){+.+.+.}, at: [<c1465d84>] rtnl_lock+0x14/0x20 #1: (&rdev->mtx){+.+.+.}, at: [<f84b8c2b>] cfg80211_mgd_wext_siwfreq+0x6b/0x170 [cfg80211] #2: (&rdev->devlist_mtx){+.+.+.}, at: [<f84b8c37>] cfg80211_mgd_wext_siwfreq+0x77/0x170 [cfg80211] #3: (&wdev->mtx){+.+.+.}, at: [<f84b8c44>] cfg80211_mgd_wext_siwfreq+0x84/0x170 [cfg80211] #4: (&rtlpriv->locks.conf_mutex){+.+.+.}, at: [<f8506476>] rtl_op_bss_info_changed+0x26/0xc10 [rtlwifi] stack backtrace: Pid: 468, comm: wpa_supplicant Not tainted 2.6.38-rc6+ #79 Call Trace: [<c108806a>] ? lockdep_rcu_dereference+0xaa/0xb0 [<f8523d2c>] ? sta_info_get_bss+0x19c/0x1b0 [mac80211] [<f8523d62>] ? ieee80211_find_sta+0x22/0x40 [mac80211] [<f850661c>] ? rtl_op_bss_info_changed+0x1cc/0xc10 [rtlwifi] [<c153671c>] ? __mutex_unlock_slowpath+0x14c/0x160 [<c153673d>] ? mutex_unlock+0xd/0x10 [<f8507180>] ? rtl_op_config+0x120/0x310 [rtlwifi] [<c10896db>] ? trace_hardirqs_on+0xb/0x10 [<f8522169>] ? ieee80211_bss_info_change_notify+0xf9/0x1f0 [mac80211] [<f8506450>] ? rtl_op_bss_info_changed+0x0/0xc10 [rtlwifi] [<f853646f>] ? ieee80211_set_channel+0xbf/0xd0 [mac80211] [<f84b5f41>] ? cfg80211_set_freq+0x121/0x180 [cfg80211] [<f85363b0>] ? ieee80211_set_channel+0x0/0xd0 [mac80211] [<f84b8ceb>] ? cfg80211_mgd_wext_siwfreq+0x12b/0x170 [cfg80211] [<f84b87eb>] ? cfg80211_wext_siwfreq+0x9b/0x100 [cfg80211] [<c153b98b>] ? sub_preempt_count+0x7b/0xb0 [<c150f874>] ? ioctl_standard_call+0x74/0x3b0 [<c1465d84>] ? rtnl_lock+0x14/0x20 [<f84b8750>] ? cfg80211_wext_siwfreq+0x0/0x100 [cfg80211] [<c14568bd>] ? __dev_get_by_name+0x8d/0xb0 [<c150fddb>] ? wext_handle_ioctl+0x16b/0x180 [<f84b8750>] ? cfg80211_wext_siwfreq+0x0/0x100 [cfg80211] [<c145bc7a>] ? dev_ioctl+0x5ba/0x720 [<c108a947>] ? __lock_acquire+0x3e7/0x19b0 [<c1443b0b>] ? sock_ioctl+0x1eb/0x290 [<c108bfa5>] ? lock_release_non_nested+0x95/0x2f0 [<c1443920>] ? sock_ioctl+0x0/0x290 [<c114d74d>] ? do_vfs_ioctl+0x7d/0x5c0 [<c1112232>] ? might_fault+0x62/0xb0 [<c113e3c6>] ? fget_light+0x226/0x390 [<c1112278>] ? might_fault+0xa8/0xb0 [<c114dd17>] ? sys_ioctl+0x87/0x90 [<c1002f9f>] ? sysenter_do_call+0x12/0x38 This work was supported by a hardware donation from the CE Linux Forum. Signed-off-by: Alessio Igor Bogani <abogani@kernel.org> Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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