linux-kernel - Re: [PATCH v2 2/4] uprobes: refuse uprobe on trap variants

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Message-ID: <20130326120626.GB20399@linux.vnet.ibm.com>
Date:	Tue, 26 Mar 2013 17:36:26 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Ananth N Mavinakayanahalli <ananth@...ibm.com>
Cc:	lkml <linux-kernel@...r.kernel.org>, oleg@...hat.com,
	benh@...nel.crashing.org, ppcdev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 2/4] uprobes: refuse uprobe on trap variants

* Ananth N Mavinakayanahalli <ananth@...ibm.com> [2013-03-22 20:47:58]:

> From: Ananth N Mavinakayanahalli <ananth@...ibm.com>
> 
> Refuse to place a uprobe if a trap variant already exists in the
> file copy at the address.
> 
> Signed-off-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>

Acked-by: Srikar Dronamraju <srikar@...ux.vnet.ibm.com>

> ---
>  kernel/events/uprobes.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-3.9-rc3/kernel/events/uprobes.c
> ===================================================================
> --- linux-3.9-rc3.orig/kernel/events/uprobes.c
> +++ linux-3.9-rc3/kernel/events/uprobes.c
> @@ -573,7 +573,7 @@ static int prepare_uprobe(struct uprobe
>  		goto out;
> 
>  	ret = -ENOTSUPP;
> -	if (is_swbp_insn((uprobe_opcode_t *)uprobe->arch.insn))
> +	if (is_trap_insn((uprobe_opcode_t *)uprobe->arch.insn))
>  		goto out;
> 
>  	ret = arch_uprobe_analyze_insn(&uprobe->arch, mm, vaddr);

-- 
Thanks and Regards
Srikar Dronamraju

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