On Mon, Jul 4, 2022 at 10:22 AM Yauheni Kaliuta <ykaliuta@xxxxxxxxxx> wrote: > > Hi! > > On Fri, Jul 1, 2022 at 2:05 PM Yauheni Kaliuta <ykaliuta@xxxxxxxxxx> wrote: > > >>>>> On Thu, 30 Jun 2022 22:57:37 +0200, Daniel Borkmann wrote: > > > > > On 6/30/22 3:19 PM, Yauheni Kaliuta wrote: > > >> Hi! > > >> test_kmod.sh fails for hardened 2 check with > > >> test_bpf: #964 Staggered jumps: JMP_JA FAIL to select_runtime > > >> err=-524 > > >> (-ERANGE during constant blinding) > > >> Did I miss something? > > > > > That could be expected if one of bpf_adj_delta_to_imm() / bpf_adj_delta_to_off() > > > fails given the targets go out of range. > > > > I believe that, but how to fix the test? It should not fail. > > > > > How do the generated insn look? > > > > The instruction when it fails is > > > > (gdb) p/x insn[0] > > $8 = {code = 0xb7, dst_reg = 0x0, src_reg = 0x0, off = 0x0, imm = 0x2aaa} > > > > And it's rewritten as > > > > (gdb) p rewritten > > $9 = 3 > > (gdb) p/x insn_buff[0] > > $10 = {code = 0xb7, dst_reg = 0xb, src_reg = 0x0, off = 0x0, imm = 0x68ad0283} > > (gdb) p/x insn_buff[1] > > $11 = {code = 0xa7, dst_reg = 0xb, src_reg = 0x0, off = 0x0, imm = 0x68ad2829} > > (gdb) p/x insn_buff[2] > > $12 = {code = 0xbf, dst_reg = 0x0, src_reg = 0xb, off = 0x0, imm = 0x0} > > > > IIUC. > > > > Johan, what do you think? Hmm, I can take a look at it. What is the target arch? Johan