linux-kernel - Re: [PATCH] tracing/kprobes: fix probe parsing

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 for Android: free password hash cracker in your pocket

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

Message-ID: <4B73329F.4050406@redhat.com>
Date:	Wed, 10 Feb 2010 17:26:39 -0500
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
CC:	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tracing/kprobes: fix probe parsing

Heiko Carstens wrote:
> From: Heiko Carstens <heiko.carstens@...ibm.com>
> 
> Trying to add a probe like
> 
> echo p:myprobe 0x10000 > /sys/kernel/debug/tracing/kprobe_events
> 
> will fail since the wrong pointer is passed to strict_strtoul
> when trying to convert the address to an unsigned long.

Right, it's a bug! Thank you!


> 
> Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>

Acked-by: Masami Hiramatsu <mhiramat@...hat.com>

> ---
>  kernel/trace/trace_kprobe.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> --- a/kernel/trace/trace_kprobe.c
> +++ b/kernel/trace/trace_kprobe.c
> @@ -689,7 +689,7 @@ static int create_trace_probe(int argc, 
>  			return -EINVAL;
>  		}
>  		/* an address specified */
> -		ret = strict_strtoul(&argv[0][2], 0, (unsigned long *)&addr);
> +		ret = strict_strtoul(&argv[1][0], 0, (unsigned long *)&addr);
>  		if (ret) {
>  			pr_info("Failed to parse address.\n");
>  			return ret;

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@...hat.com

--
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/