On Wed, Jan 10, 2024 at 1:04 PM Eduard Zingerman wrote:
>
> On Tue, 2024-01-09 at 16:22 -0800, Andrii Nakryiko wrote:
> [...]
> > > static bool stacksafe(struct bpf_verifier_env *env, struct
> > > bpf_func_state *old,
> > > struct bpf_func_state *cur, struct bpf_idmap
> >
On Tue, 2024-01-09 at 16:22 -0800, Andrii Nakryiko wrote:
[...]
> > static bool stacksafe(struct bpf_verifier_env *env, struct bpf_func_state
> > *old,
> > struct bpf_func_state *cur, struct bpf_idmap *idmap,
> > bool exact)
> > {
> > + struct bpf_reg_state unbound_r
On Mon, Jan 8, 2024 at 12:53 PM Maxim Mikityanskiy wrote:
>
> From: Eduard Zingerman
>
> Changes for scalar ID tracking of spilled unbound scalars lead to
> certain verification performance regression. This commit mitigates the
> regression by exploiting the following properties maintained by
> c
From: Eduard Zingerman
Changes for scalar ID tracking of spilled unbound scalars lead to
certain verification performance regression. This commit mitigates the
regression by exploiting the following properties maintained by
check_stack_read_fixed_off():
- a mix of STACK_MISC, STACK_ZERO and STACK
