linux-kernel - Re: ath9k: BUG kmalloc-8192: Poison overwritten

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Date:	Fri, 14 May 2010 15:20:30 +0900
From:	Bruno Randolf <br1@...fach.org>
To:	"Luis R. Rodriguez" <lrodriguez@...eros.com>
Cc:	"Justin P. Mattock" <justinmattock@...il.com>,
	Luis Rodriguez <Luis.Rodriguez@...eros.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: ath9k: BUG kmalloc-8192: Poison overwritten

On Friday 14 May 2010 15:16:22 Luis R. Rodriguez wrote:
> On Thu, May 13, 2010 at 9:44 PM, Justin P. Mattock
> 
> <justinmattock@...il.com> wrote:
> > On 05/13/10 21:01, Luis R. Rodriguez wrote:
> >> On Thu, May 13, 2010 at 7:14 PM, Justin P. Mattock
> >> 
> >> <justinmattock@...il.com>  wrote:
> >>> what I can try, is(not at the convention, on eth0
> >>> at the moment), but when I get back to the convention
> >>> center place I can try your patch as well as the
> >>> modprobe option, to see if I can get any signs of
> >>> a recreation(if so I'll bisect there).
> >> 
> >> The debug info I just need upon load of the module, I don't need you
> >> to run the debug stuff to try to reproduce. The debug print upon load
> >> will tell us the rxbuf size and cache line size.
> >> 
> >>   Luis
> > 
> > o.k. it's not pretty due
> > to loads of avc's for SELinux:
> > (I run a rootless system).
> > 
> > [   84.172649] ath9k: Driver unloaded
> > [  100.675300] audit_printk_skb: 6 callbacks suppressed
> > [  100.675306] type=1400 audit(1273811633.675:20): avc:  denied  { search
> > } for  pid=2168 comm="modprobe" name="modules" dev=sda3 ino=2500
> > scontext=name:staff_r:staff_sudo_t:s0
> > tcontext=system_u:object_r:modules_object_t:s0 tclass=dir
> > [  100.675408] type=1400 audit(1273811633.675:20): avc:  denied  { search
> > } for  pid=2168 comm="modprobe" name="2.6.34-rc7-00057-gcdfda35"
> > dev=sda3 ino=524392 scontext=name:staff_r:staff_sudo_t:s0
> > tcontext=name:object_r:modules_object_t:s0 tclass=dir
> > [  100.675552] type=1400 audit(1273811633.675:20): avc:  denied  { read }
> > for  pid=2168 comm="modprobe" name="modules.dep.bin" dev=sda3 ino=525251
> > scontext=name:staff_r:staff_sudo_t:s0
> > tcontext=name:object_r:modules_object_t:s0 tclass=file
> > [  100.675598] type=1400 audit(1273811633.675:20): avc:  denied  { open }
> > for  pid=2168 comm="modprobe" name="modules.dep.bin" dev=sda3 ino=525251
> > scontext=name:staff_r:staff_sudo_t:s0
> > tcontext=name:object_r:modules_object_t:s0 tclass=file
> > [  100.675748] type=1300 audit(1273811633.675:20): arch=c000003e
> > syscall=2 success=yes exit=3 a0=60d140 a1=0 a2=1b6 a3=0 items=0
> > ppid=2080 pid=2168 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0 egid=0
> > sgid=0 fsgid=0 tty=pts0 ses=1 comm="modprobe" exe="/sbin/modprobe"
> > subj=name:staff_r:staff_sudo_t:s0 key=(null)
> > [  100.675902] type=1400 audit(1273811633.675:21): avc:  denied  {
> > getattr } for  pid=2168 comm="modprobe"
> > path="/lib/modules/2.6.34-rc7-00057-gcdfda35/modules.dep.bin" dev=sda3
> > ino=525251 scontext=name:staff_r:staff_sudo_t:s0
> > tcontext=name:object_r:modules_object_t:s0 tclass=file
> > [  100.676052] type=1300 audit(1273811633.675:21): arch=c000003e
> > syscall=5 success=yes exit=0 a0=3 a1=7fffd2d1dd70 a2=7fffd2d1dd70 a3=0
> > items=0 ppid=2080 pid=2168 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0
> > egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="modprobe"
> > exe="/sbin/modprobe"
> > subj=name:staff_r:staff_sudo_t:s0 key=(null)
> > [  100.698392] ath9k 0000:03:00.0: PCI INT A -> GSI 17 (level, low) ->
> > IRQ 17
> > [  100.698409] ath9k 0000:03:00.0: setting latency timer to 64
> > [  100.828787] ath: EEPROM regdomain: 0x64
> > [  100.828790] ath: EEPROM indicates we should expect a direct regpair
> > map [  100.828793] ath: Country alpha2 being used: 00
> > [  100.828795] ath: Regpair used: 0x64
> > [  100.848609] type=1400 audit(1273811633.678:22): avc:  denied  { search
> > } for  pid=2168 comm="modprobe" name="ieee80211" dev=debugfs ino=18
> > scontext=name:staff_r:staff_sudo_t:s0
> > tcontext=system_u:object_r:debugfs_t:s0 tclass=dir
> > [  100.848788] phy1: Selected rate control algorithm 'ath9k_rate_control'
> > [  100.850035] Registered led device: ath9k-phy1::radio
> > [  100.850488] Registered led device: ath9k-phy1::assoc
> > [  100.851227] Registered led device: ath9k-phy1::tx
> > [  100.851633] Registered led device: ath9k-phy1::rx
> > [  100.851640] phy1: Atheros AR5418 MAC/BB Rev:2 AR5133 RF Rev:81
> > mem=0xffffc900005a0000, irq=17
> > [  100.852240] type=1300 audit(1273811633.678:22): arch=c000003e
> > syscall=175 success=yes exit=0 a0=7f1e9d6ab010 a1=19580 a2=60d920 a3=0
> > items=0 ppid=2080 pid=2168 auid=1000 uid=0 gid=0 euid=0 suid=0 fsuid=0
> > egid=0 sgid=0 fsgid=0 tty=pts0 ses=1 comm="modprobe"
> > exe="/sbin/modprobe"
> > subj=name:staff_r:staff_sudo_t:s0 key=(null)
> > 
> > but there you go dmesg of the debug info for you
> 
> Justin, did you forget to use the debug parameter on modprobe ath9k?
> 
> modprobe ath9k debug=0x0000020
> 
> I do not see the output I expected.

i think you have to do at least "ifconfig wlan0 up" to see it - (at least for 
ath5k).

bruno
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