[PATCH] scripts: Fix potential null-deref

[Quentin Schulz]

Hi Maks(?)

On 4/18/25 10:19 AM, ant.v.moryakov at gmail.com wrote:
> From: Maks Mishin <maks.mishinFZ at gmail.com>
> 
> Signed-off-by: Maks Mishin <maks.mishinFZ at gmail.com>

This seems to differ from the sender. Are you Maks? If not, you need to 
add your Signed-off-by to fulfill the DCO requirements.

> ---
>   scripts/kconfig/menu.c | 6 ++++--
>   1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/scripts/kconfig/menu.c b/scripts/kconfig/menu.c
> index 5c5c1374..a0d0d2af 100644
> --- a/scripts/kconfig/menu.c
> +++ b/scripts/kconfig/menu.c
> @@ -812,8 +812,10 @@ static void get_symbol_str(struct gstr *r, struct symbol *sym,
>   			}
>   		}
>   	}
> -	for_all_prompts(sym, prop)
> -		get_prompt_str(r, prop, head);
> +	if (sym) {
> +		for_all_prompts(sym, prop)
> +			get_prompt_str(r, prop, head);
> +	}
>   
>   	prop = get_symbol_prop(sym);

This one too can do a null-deref.

And same for some other functions after as well.

Wondering if we shouldn't update the macros to not enter the for loops 
if sym is NULL? So we don't have to patch every caller?

Cheers,
Quentin