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Diffstat (limited to 'kernel/bpf/verifier.c')
-rw-r--r--kernel/bpf/verifier.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 225666307bba..264b3dc714cc 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -6745,11 +6745,11 @@ static int __check_func_call(struct bpf_verifier_env *env, struct bpf_insn *insn
/* Transfer references to the callee */
err = copy_reference_state(callee, caller);
if (err)
- return err;
+ goto err_out;
err = set_callee_state_cb(env, caller, callee, *insn_idx);
if (err)
- return err;
+ goto err_out;
clear_caller_saved_regs(env, caller->regs);
@@ -6766,6 +6766,11 @@ static int __check_func_call(struct bpf_verifier_env *env, struct bpf_insn *insn
print_verifier_state(env, callee, true);
}
return 0;
+
+err_out:
+ free_func_state(callee);
+ state->frame[state->curframe + 1] = NULL;
+ return err;
}
int map_set_for_each_callback_args(struct bpf_verifier_env *env,
@@ -6979,8 +6984,7 @@ static int prepare_func_exit(struct bpf_verifier_env *env, int *insn_idx)
return -EINVAL;
}
- state->curframe--;
- caller = state->frame[state->curframe];
+ caller = state->frame[state->curframe - 1];
if (callee->in_callback_fn) {
/* enforce R0 return value range [0, 1]. */
struct tnum range = callee->callback_ret_range;
@@ -7019,7 +7023,7 @@ static int prepare_func_exit(struct bpf_verifier_env *env, int *insn_idx)
}
/* clear everything in the callee */
free_func_state(callee);
- state->frame[state->curframe + 1] = NULL;
+ state->frame[state->curframe--] = NULL;
return 0;
}