linux-kernel - Re: [GIT PULL] tracing: Fix misuse of strncpy to copy boot params

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] [day] [month] [year] [list]

Date:	Thu, 15 Oct 2009 14:32:40 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [GIT PULL] tracing: Fix misuse of strncpy to copy boot params

On Thu, Oct 15, 2009 at 10:01:13AM +0800, Li Zefan wrote:
> > diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
> > index 4506826..621d81e 100644
> > --- a/kernel/trace/trace.c
> > +++ b/kernel/trace/trace.c
> > @@ -131,7 +131,7 @@ static char *default_bootup_tracer;
> >  
> >  static int __init set_ftrace(char *str)
> >  {
> > -	strncpy(bootup_tracer_buf, str, MAX_TRACER_SIZE);
> > +	strlcpy(bootup_tracer_buf, str, MAX_TRACER_SIZE);
> 
> Actually using strncpy() here is fine.
> 
> See how the str buf is used:
> 
> int register_tracer(struct tracer *type)
> {
> 	...
> 	if (strncmp(default_bootup_tracer, type->name, MAX_TRACER_SIZE))
> 	...
> }



Yeah. I can remove the change for this buffer and send
another pull request.

Thanks.

 
> >  	default_bootup_tracer = bootup_tracer_buf;
> >  	/* We are using ftrace early, expand it */
> >  	ring_buffer_expanded = 1;

--
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/