Re: [PATCH] livepatch: Fix NULL pointer dereference in klp_find_func()

On Tue, 23 Jun 2026, Yafang Shao wrote:

> A NULL old_name in a newly loaded livepatch's function entry causes a
> NULL pointer dereference in strcmp():
> 
>   klp_init_patch()
>     klp_add_nops()
>       klp_find_func()
>         strcmp(old_func->old_name, func->old_name)
> 
> Add a sanity check at the beginning of klp_enable_patch() to reject
> patches with NULL old_name before they reach this code path.

The changelog could also mention the introduction of klp_check_patch().

Acked-by: Miroslav Benes <[email protected]>

M