[PATCH bpf-next v4 1/4] bpf: Fix an off-by-one error in check_indirect_jump

[Xu Kuohai]

From: Xu Kuohai <xukuohai at huawei.com>

Fix an off-by-one error in check_indirect_jump() that skips the last
element returned by copy_insn_array_uniq().

Fixes: 493d9e0d6083 ("bpf, x86: add support for indirect jumps")
Signed-off-by: Xu Kuohai <xukuohai at huawei.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 faa1ecc1fe9d..22605d9e0ffa 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -20336,7 +20336,7 @@ static int check_indirect_jump(struct bpf_verifier_env *env, struct bpf_insn *in
 		return -EINVAL;
 	}
 
-	for (i = 0; i < n - 1; i++) {
+	for (i = 0; i < n; i++) {
 		other_branch = push_stack(env, env->gotox_tmp_buf->items[i],
 					  env->insn_idx, env->cur_state->speculative);
 		if (IS_ERR(other_branch))
-- 
2.47.3