linux-kernel - Re: [perf] more perf_fuzzer memory corruption

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:	Fri, 2 May 2014 22:45:09 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Vince Weaver <vincent.weaver@...ne.edu>
cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [perf] more perf_fuzzer memory corruption

On Fri, 2 May 2014, Vince Weaver wrote:

> On Fri, 2 May 2014, Thomas Gleixner wrote:
> 
> > Hmm, and where comes the WARN_ON in _free_event() from? That's not in
> > Peters last patch.
> 
> ahh, you're right :(  My fault.  I gave the new patch and the previous 
> patch similar names and applied the wrong one.
> 
> OK the proper patch has been running the quick reproducer for a bit 
> without triggering the issue, I'll let it run a bit more and then upgrade 
> to full fuzzing.

If you do that, please add the patch below.

Thanks,

	tglx


Index: linux-2.6/kernel/events/core.c
===================================================================
--- linux-2.6.orig/kernel/events/core.c
+++ linux-2.6/kernel/events/core.c
@@ -7378,7 +7378,7 @@ __perf_event_exit_task(struct perf_event
 			 struct perf_event_context *child_ctx,
 			 struct task_struct *child)
 {
-	perf_remove_from_context(child_event, !!child_event->parent);
+	perf_remove_from_context(child_event, true);
 
 	/*
 	 * It can happen that the parent exits first, and has events
--
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/