linux-kernel - Re: [PATCH 2/2] [BUGFIX] kprobes: Fix selftest to clear flags field for reusing probes

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Message-ID: <20100805125611.GB28884@in.ibm.com>
Date:	Thu, 5 Aug 2010 18:26:11 +0530
From:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
To:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] [BUGFIX] kprobes: Fix selftest to clear flags
 field for reusing probes

On Thu, Aug 05, 2010 at 09:35:11PM +0900, Masami Hiramatsu wrote:
> Fix selftest to clear flags field for reusing probes
> because the flags field can be modified by Kprobes.
> This also set NULL to kprobe.addr instead of 0.
> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> Cc: Ananth N Mavinakayanahalli <ananth@...ibm.com>

Acked-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>

> Cc: linux-kernel@...r.kernel.org
> ---
> 
>  kernel/test_kprobes.c |   12 +++++++++---
>  1 files changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/kernel/test_kprobes.c b/kernel/test_kprobes.c
> index 4f10451..f8b11a2 100644
> --- a/kernel/test_kprobes.c
> +++ b/kernel/test_kprobes.c
> @@ -115,7 +115,9 @@ static int test_kprobes(void)
>  	int ret;
>  	struct kprobe *kps[2] = {&kp, &kp2};
> 
> -	kp.addr = 0; /* addr should be cleard for reusing kprobe. */
> +	/* addr and flags should be cleard for reusing kprobe. */
> +	kp.addr = NULL;
> +	kp.flags = 0;
>  	ret = register_kprobes(kps, 2);
>  	if (ret < 0) {
>  		printk(KERN_ERR "Kprobe smoke test failed: "
> @@ -210,7 +212,9 @@ static int test_jprobes(void)
>  	int ret;
>  	struct jprobe *jps[2] = {&jp, &jp2};
> 
> -	jp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
> +	/* addr and flags should be cleard for reusing kprobe. */
> +	jp.kp.addr = NULL;
> +	jp.kp.flags = 0;
>  	ret = register_jprobes(jps, 2);
>  	if (ret < 0) {
>  		printk(KERN_ERR "Kprobe smoke test failed: "
> @@ -323,7 +327,9 @@ static int test_kretprobes(void)
>  	int ret;
>  	struct kretprobe *rps[2] = {&rp, &rp2};
> 
> -	rp.kp.addr = 0; /* addr should be cleard for reusing kprobe. */
> +	/* addr and flags should be cleard for reusing kprobe. */
> +	rp.kp.addr = NULL;
> +	rp.kp.flags = 0;
>  	ret = register_kretprobes(rps, 2);
>  	if (ret < 0) {
>  		printk(KERN_ERR "Kprobe smoke test failed: "
> 
--
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