linux-kernel - Re: [patch 3/3] x86_64, cpa: use only text section in set_kernel_text

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]

Message-Id: <1256932740.26028.3310.camel@gandalf.stny.rr.com>
Date:	Fri, 30 Oct 2009 15:59:00 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Suresh Siddha <suresh.b.siddha@...el.com>
Cc:	"mingo@...e.hu" <mingo@...e.hu>, "hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [patch 3/3] x86_64, cpa: use only text section in
 set_kernel_text_rw/ro

On Fri, 2009-10-30 at 11:17 -0800, Suresh Siddha wrote:
> On Wed, 2009-10-28 at 19:06 -0700, Steven Rostedt wrote:
> > On Wed, 2009-10-28 at 18:46 -0800, Suresh Siddha wrote:
> > > plain text document attachment (fix_kernel_text_ro_rw.patch)
> > > set_kernel_text_rw()/set_kernel_text_ro() are marking pages starting
> > > from _text to __start_rodata as RW or RO.
> > > 
> > > With CONFIG_DEBUG_RODATA, there might be free pages (associated with
> > > padding the sections to 2MB large page boundary) between text
> > > and rodata sections that are given back to page allocator. So we should
> > > use only use the start (__text) and end (__stop___ex_table) of the
> > > text section in set_kernel_text_rw()/set_kernel_text_ro().
> > > 
> > > Cc: Steven Rostedt <rostedt@...dmis.org>
> > > Signed-off-by: Suresh Siddha <suresh.b.siddha@...el.com>
> > > ---
> > >  
> > 
> > I'll go ahead and test this to make sure it does not bust ftrace with an
> > allyesconfig.
> 
> Steve, Good to go?

Yep. Sorry, during the testing I hit the jprobe vs function graph bug
and got distracted. But as for this patch set ...

Tested-by: Steven Rostedt <rostedt@...dmis.org>

Thanks,

-- Steve

> 
> If so, Ingo can you please consider this patchset?


--
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/