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

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Message-Id: <201005141538.43416.br1@einfach.org>
Date:	Fri, 14 May 2010 15:38:43 +0900
From:	Bruno Randolf <br1@...fach.org>
To:	"Justin P. Mattock" <justinmattock@...il.com>
Cc:	"Luis R. Rodriguez" <lrodriguez@...eros.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 15:31:26 Justin P. Mattock wrote:
> On 05/13/10 23:20, Bruno Randolf wrote:
> > 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
> 
> didn't think todo so, I'll redu
> again and see. BTW: the connection
> over here is dodgy(hotel) should I at-least
> find a stable access point? i.g. convetion
> center seemed semi somewhat there

no that does not matter. just ifconfig up is enough. it's just initialization, 
you don't need a connection for that.

bruno

> Justin P. Mattock
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