diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 14ad7c6e806ab3650edd1860f587d9c2af1af8ab..46ff4e5b3fb7d5291afb33e6d8b676a99a55c796 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -795,6 +795,11 @@ static int check_stack_read(struct bpf_verifier_env *env, if (value_regno >= 0) { /* restore register state from stack */ state->regs[value_regno] = state->stack[spi].spilled_ptr; + /* mark reg as written since spilled pointer state likely + * has its liveness marks cleared by is_state_visited() + * which resets stack/reg liveness for state transitions + */ + state->regs[value_regno].live |= REG_LIVE_WRITTEN; mark_stack_slot_read(state, spi); } return 0;