Re: [crash] BUG: unable to handle kernel NULL pointer dereference at 0000000000000370

* Larry Finger [off-list ref] wrote:

Ingo Molnar wrote:

quoted

* Ian Schram [off-list ref] wrote:

quoted

I was looking at this out of interest, but I'm in no way familiar 
with the code.

thanks Ian for the patch, i'll test it.

Note that it was whitespace damaged, find below a tidied up version of  
the patch that i've applied to tip/out-of-tree.

	Ingo

This patch may be needed to fix error handling in the hw_sim code, but 
I get the crash even with that code disabled. I'm currently bisecting 
to find the culprit.

ok. I just reactivated CONFIG_MAC80211_HWSIM, applied Ian's fix and the 
crash went away:

 calling  iwl4965_init+0x0/0x6c
 iwl4965: Intel(R) Wireless WiFi Link 4965AGN driver for Linux, 1.3.27kd
 iwl4965: Copyright(c) 2003-2008 Intel Corporation
 initcall iwl4965_init+0x0/0x6c returned 0 after 10 msecs
 calling  init_mac80211_hwsim+0x0/0x31c
 mac80211_hwsim: Initializing radio 0
 PM: Adding info for No Bus:hwsim0
 PM: Adding info for No Bus:phy0
 PM: Adding info for No Bus:wmaster0
 phy0: Failed to select rate control algorithm
 phy0: Failed to initialize rate control algorithm
 PM: Removing info for No Bus:wmaster0
 PM: Removing info for No Bus:phy0
 mac80211_hwsim: ieee80211_register_hw failed (-2)
 PM: Removing info for No Bus:hwsim0
 initcall init_mac80211_hwsim+0x0/0x31c returned -2 after 58 msecs
 initcall init_mac80211_hwsim+0x0/0x31c returned with error code -2
 calling  dmfe_init_module+0x0/0xea
 dmfe: Davicom DM9xxx net driver, version 1.36.4 (2002-01-17)
 initcall dmfe_init_module+0x0/0xea returned 0 after 5 msecs

So at least as far as the init_mac80211_hwsim() deinit crash goes:

Tested-by: Ingo Molnar <redacted>

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html