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bpf: log PTR_TO_MEM memory size in verifier log

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Emit valid memory size addressable through PTR_TO_MEM register.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20231204233931.49758-2-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko 2023-12-04 15:39:19 -08:00 committed by Alexei Starovoitov
parent e72c1ccfd4
commit 1e68485d82
1 changed files with 4 additions and 0 deletions
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4
kernel/bpf/log.c
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@ -682,6 +682,10 @@ static void print_reg_state(struct bpf_verifier_env *env,
verbose_a("r=");
verbose_unum(env, reg->range);
}
if (base_type(t) == PTR_TO_MEM) {
verbose_a("sz=");
verbose_unum(env, reg->mem_size);
}
if (tnum_is_const(reg->var_off)) {
/* a pointer register with fixed offset */
if (reg->var_off.value) {