linux-kernel - Re: 2.6.18-mm2 - oops in cache_alloc

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Message-Id: <200609300750.k8U7oihQ008628@turing-police.cc.vt.edu>
Date:	Sat, 30 Sep 2006 03:50:43 -0400
From:	Valdis.Kletnieks@...edu
To:	jt@....hp.com, Andrew Morton <akpm@...l.org>,
	"John W. Linville" <linville@...driver.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: 2.6.18-mm2 - oops in cache_alloc_refill()

On Fri, 29 Sep 2006 23:31:07 EDT, Valdis.Kletnieks@...edu said:
> Fair enough,  I'm going to try reverting the 2 commits and see if things
> behave better.

OK, it's definitely something in those 2 commits - I reverted them and the
resulting 2.6.18-mm2 kernel has been up and stable for 4 hours, even with
the problem gkrellm updating once a second the whole time.

I'm not *seeing* how those changes can cause trouble - unless it's this:

diff --git a/drivers/net/wireless/orinoco.c b/drivers/net/wireless/orinoco.c
index 1840b69..9e19a96 100644
--- a/drivers/net/wireless/orinoco.c
+++ b/drivers/net/wireless/orinoco.c
@@ -3037,7 +3037,7 @@ static int orinoco_ioctl_getessid(struct
        }
 
        erq->flags = 1;
-       erq->length = strlen(essidbuf) + 1;
+       erq->length = strlen(essidbuf);

Does some other code go batshit if length ==0?  My current config doesn't
try to actually ifup the wireless if I also have connectivity via copper (in
order to avoid chewing up a DHCP lease in crowded address space if not needed).

% iwconfig eth5
eth5      IEEE 802.11b  ESSID:""  Nickname:"HERMES I"
          Mode:Managed  Frequency:2.457 GHz  Access Point: Not-Associated   
          Bit Rate:11 Mb/s   Sensitivity:1/3  
          Retry limit:4   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=0/92  Signal level=134/153  Noise level=134/153
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

That ESSID the source of the trouble?


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