linux-kernel - Re: 2.6.33: ftrace triggers soft lockup

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 13 Mar 2010 12:56:16 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Lai Jiangshan <laijs@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.33: ftrace triggers soft lockup

On Fri, 2010-03-12 at 21:07 -0500, Steven Rostedt wrote:
> On Tue, 2010-03-09 at 11:38 +0800, Li Zefan wrote:
> 
> > The segfault is from userspace. This is a segfault I just got:
> > 
> > ftrace_stack_ma[14989]: segfault at fe2e ip 00000000004474c0 sp 00007fffb97e38c0 error 4 in bash[400000+d1000]
> 
> Li and Lai,
> 
> Thanks a lot for reporting all this, and writing the ftrace_stress_test.
> I've fixed all the bugs that it has reported (to my knowledge) and after
> a little more testing I will soon be sending a patch series out.

Li,

I ran your test for 13 hours on three different machines. I did not hit
any more errors. Although I see a lockdep warning (not a locking problem
but the WARN_ON in fork.c is triggering). I'll look into that on Monday.

Please take the new patches that Ingo just pushed to Linus, if you find
any more bugs, please let me know right away.

Thanks!

-- Steve


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/