Re: [RFC PATCH v3 01/12] objtool: Fix SEGFAULT

[Christophe Leroy]

Le 24/06/2022 à 20:32, Sathvika Vasireddy a écrit :
> From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>

This patch needs some description. Could be:

   find_insn() will return NULL in case of failure. Check insn in order
   to avoid a kernel Oops for NULL pointer dereference.

> 
> Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
> ---
>   tools/objtool/check.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/objtool/check.c b/tools/objtool/check.c
> index 190b2f6e360a..6cb07e151588 100644
> --- a/tools/objtool/check.c
> +++ b/tools/objtool/check.c
> @@ -203,7 +203,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
>   		return false;
>   
>   	insn = find_insn(file, func->sec, func->offset);
> -	if (!insn->func)
> +	if (!insn || !insn->func)
>   		return false;
>   
>   	func_for_each_insn(file, func, insn) {