Bug 18842

Summary:	BUG kmalloc-512: Poison overwritten when running with debug enabled
Product:	Networking	Reporter:	Alex Villacis Lasso (avillaci)
Component:	Other	Assignee:	Arnaldo Carvalho de Melo (acme)
Status:	RESOLVED OBSOLETE
Severity:	normal	CC:	alan
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.36-rc4	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	dmesg output with backtrace at the end Kernel configuration used to compile crashing kernel Further dmesg with backtrace

Description Alex Villacis Lasso 2010-09-20 15:25:00 UTC

Created attachment 30752 [details]
dmesg output with backtrace at the end

Description:

I am running with several kernel debugging options enabled, in order to track possible causes of https://bugs.freedesktop.org/show_bug.cgi?id=29325 . During this run, while leaving a Bittorrent client running over the weekend, I found the attached backtrace in the kernel log on Monday.

To reproduce (speculative):
- Enable debugging options as indicated by attached config
- Leave moderate network activity (Bittorrent) running for a few days

Actual results:
Backtrace found on dmesg. System seems to run normally.

Expected results:
No backtrace.

Kernel built on Sep. 17 2010 on Fedora 12 x86_64

Comment 1 Alex Villacis Lasso 2010-09-20 15:28:29 UTC

Created attachment 30762 [details]
Kernel configuration used to compile crashing kernel

Comment 2 Alex Villacis Lasso 2010-09-20 20:48:30 UTC

Created attachment 30832 [details]
Further dmesg with backtrace

This second backtrace is in the same session as the first one. I started Azureus (the Bittorrent client) a few times before I noticed this second backtrace, but I could not confirm whether starting Azureus actually *causes* the backtrace.

Comment 3 Alex Villacis Lasso 2010-09-22 17:46:46 UTC

Now testing for the bug with commit 8b15575cae7a93a784c3005c42b069edd9ba64dd past 2.6.36-rc5 in mainline kernel...