[PATCH bpf-next v6 03/23] bpf/verifier: do not clear meta in check_mem_size

[Benjamin Tissoires]

The purpose of this clear is to prevent meta->raw_mode to be evaluated
at true, but this also prevents to forward any other data to the other
callees.

Only switch back raw_mode to false so we don't entirely clear meta.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>

---

new in v6
---
 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 f6af57a84247..3adcc0d123af 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -5277,7 +5277,7 @@ static int check_mem_size_reg(struct bpf_verifier_env *env,
 		 * initialize all the memory that the helper could
 		 * just partially fill up.
 		 */
-		meta = NULL;
+		meta->raw_mode = false;
 
 	if (reg->smin_value < 0) {
 		verbose(env, "R%d min value is negative, either use unsigned or 'var &= const'\n",
-- 
2.36.1