On Mon, May 19, 2025 at 9:38 AM David Wang <00107...@163.com> wrote:
>
> When module load fails after memory for codetag section is ready,
> codetag section memory will not be properly released. This
> causes memory leak, and if next module load happens to get the
> same module address, codetag may pick the uninitialized section
> when manipulating tags during module unload, and leads to
> "unable to handle page fault" BUG.
>
> Closes: https://lore.kernel.org/all/20250516131246.6244-1-00107...@163.com/
> Signed-off-by: David Wang <00107...@163.com>
> Acked-by: Suren Baghdasaryan <sur...@google.com>
Sending to Andrew for adding into the mm tree.
> ---
> kernel/module/main.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/module/main.c b/kernel/module/main.c
> index a2859dc3eea6..5c6ab20240a6 100644
> --- a/kernel/module/main.c
> +++ b/kernel/module/main.c
> @@ -2829,6 +2829,7 @@ static void module_deallocate(struct module *mod,
> struct load_info *info)
> {
> percpu_modfree(mod);
> module_arch_freeing_init(mod);
> + codetag_free_module_sections(mod);
>
> free_mod_mem(mod);
> }
> --
> 2.39.2
>
