diff options
Diffstat (limited to 'kernel/bpf/const_fold.c')
| -rw-r--r-- | kernel/bpf/const_fold.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/bpf/const_fold.c b/kernel/bpf/const_fold.c index db73c4740b1e..b2a19acadb91 100644 --- a/kernel/bpf/const_fold.c +++ b/kernel/bpf/const_fold.c @@ -58,6 +58,14 @@ static void const_reg_xfer(struct bpf_verifier_env *env, struct const_arg_info * u8 opcode = BPF_OP(insn->code) | BPF_SRC(insn->code); int r; + /* Stack arg stores (r11-based) are outside the tracked register set. */ + if (is_stack_arg_st(insn) || is_stack_arg_stx(insn)) + return; + if (is_stack_arg_ldx(insn)) { + ci_out[insn->dst_reg] = unknown; + return; + } + switch (class) { case BPF_ALU: case BPF_ALU64: |