[PATCH bpf-next] bpf: Fix a verifier message for alloc size helper arg

[Brendan Jackman]

The error message here is misleading, the argument will be rejected
unless it is a known constant.

Signed-off-by: Brendan Jackman <jackm...@google.com>
---
 kernel/bpf/verifier.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 17270b8404f1..5534e667bdb1 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -4319,7 +4319,7 @@ static int check_func_arg(struct bpf_verifier_env *env, 
u32 arg,
                        err = mark_chain_precision(env, regno);
        } else if (arg_type_is_alloc_size(arg_type)) {
                if (!tnum_is_const(reg->var_off)) {
-                       verbose(env, "R%d unbounded size, use 'var &= const' or 
'if (var < const)'\n",
+                       verbose(env, "R%d is not a known constant'\n",
                                regno);
                        return -EACCES;
                }

base-commit: e22d7f05e445165e58feddb4e40cc9c0f94453bc
-- 
2.30.0.284.gd98b1dd5eaa7-goog