linux-kernel - Re: [PATCH] uprobes: don't put NULL pointer in uprobe

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Message-ID: <20120912124357.GE9582@linux.vnet.ibm.com>
Date:	Wed, 12 Sep 2012 18:13:57 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	ananth@...ibm.com, x86@...nel.org, linux-kernel@...r.kernel.org,
	oleg@...hat.com
Subject: Re: [PATCH] uprobes: don't put NULL pointer in uprobe_register()

* Sebastian Andrzej Siewior <bigeasy@...utronix.de> [2012-08-30 19:26:22]:

> alloc_uprobe() might return a NULL pointer, put_uprobe() can't deal with
> this.
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

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

> ---
>  kernel/events/uprobes.c |    3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index 7b3112c..30f3e23 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -897,7 +897,8 @@ int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *
>  	}
> 
>  	mutex_unlock(uprobes_hash(inode));
> -	put_uprobe(uprobe);
> +	if (uprobe)
> +		put_uprobe(uprobe);
> 
>  	return ret;
>  }
> -- 
> 1.7.10.4
> 

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