Re: [PATCH 3/5] uprobes: remove check for uprobe variable in handle_swbp()

[Oleg Nesterov <oleg@redhat.com>]

On 08/07, Sebastian Andrzej Siewior wrote:
>
> by the time we get here (after we pass cleanup_ret) uprobe is always is
> set. If it is NULL we leave very early in the code.

Reviewed-by: Oleg Nesterov <oleg@redhat.com>

> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> ---
>  kernel/events/uprobes.c |   16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index 41a2555..c8e5204 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -1528,17 +1528,15 @@ cleanup_ret:
>  		utask->active_uprobe = NULL;
>  		utask->state = UTASK_RUNNING;
>  	}
> -	if (uprobe) {
> -		if (!(uprobe->flags & UPROBE_SKIP_SSTEP))
> +	if (!(uprobe->flags & UPROBE_SKIP_SSTEP))
>  
> -			/*
> -			 * cannot singlestep; cannot skip instruction;
> -			 * re-execute the instruction.
> -			 */
> -			instruction_pointer_set(regs, bp_vaddr);
> +		/*
> +		 * cannot singlestep; cannot skip instruction;
> +		 * re-execute the instruction.
> +		 */
> +		instruction_pointer_set(regs, bp_vaddr);
>  
> -		put_uprobe(uprobe);
> -	}
> +	put_uprobe(uprobe);
>  }
>  
>  /*
> -- 
> 1.7.10.4
>