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bpf: Drop reg_type_may_be_refcounted_or_null 

It is not scalable to maintain a list of types that can have non-zero
ref_obj_id. It is never set for scalars anyway, so just remove the
conditional on register types and print it whenever it is non-zero.

Acked-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20221103191013.1236066-6-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Kumar Kartikeya Dwivedi 2022-11-04 00:39:54 +05:30 committed by Alexei Starovoitov
parent f5e477a861
commit a28ace782e
1 changed files with 1 additions and 8 deletions
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9
kernel/bpf/verifier.c
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@ -457,13 +457,6 @@ static bool reg_may_point_to_spin_lock(const struct bpf_reg_state *reg)
map_value_has_spin_lock(reg->map_ptr);
}
static bool reg_type_may_be_refcounted_or_null(enum bpf_reg_type type)
{
type = base_type(type);
return type == PTR_TO_SOCKET || type == PTR_TO_TCP_SOCK ||
type == PTR_TO_MEM || type == PTR_TO_BTF_ID;
}
static bool type_is_rdonly_mem(u32 type)
{
return type & MEM_RDONLY;
@ -875,7 +868,7 @@ static void print_verifier_state(struct bpf_verifier_env *env,
if (reg->id)
verbose_a("id=%d", reg->id);
if (reg_type_may_be_refcounted_or_null(t) && reg->ref_obj_id)
if (reg->ref_obj_id)
verbose_a("ref_obj_id=%d", reg->ref_obj_id);
if (t != SCALAR_VALUE)
verbose_a("off=%d", reg->off);