netdev - Re: selftests: bpf: test_align Failed to find match 1: R1=ctx(id=0,off=0,imm=0) func#0 @0

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Date:   Mon, 18 Mar 2019 09:26:48 -0700
From:   Y Song <ys114321@...il.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Netdev <netdev@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Anders Roxell <anders.roxell@...aro.org>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: selftests: bpf: test_align Failed to find match 1:
 R1=ctx(id=0,off=0,imm=0) func#0 @0

On Mon, Mar 18, 2019 at 6:03 AM Naresh Kamboju
<naresh.kamboju@...aro.org> wrote:
>
> selftests: bpf: test_align failed on all devices ( arm64, armv7,
> x86_64 and i386) running Linux -next kernel 5.1.0-rc1 tag:
> next-20190318.
>
> Here is the log from arm64,
>
> selftests: bpf: test_align
> Test   0: mov ... Failed to find match 1: R1=ctx(id=0,off=0,imm=0)
> func#0 @0
> 0: R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R10=fp0,call_-1
> 0: (b7) r3 = 2
> 1: R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R3_w=inv2 R10=fp0,call_-1
> 1: (b7) r3 = 4
> 2: R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R3_w=inv4 R10=fp0,call_-1
> 2: (b7) r3 = 8
> 3: R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R3_w=inv8 R10=fp0,call_-1
> 3: (b7) r3 = 16
> 4: R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R3_w=inv16 R10=fp0,call_-1
> 4: (b7) r3 = 32
> 5: R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R3_w=inv32 R10=fp0,call_-1
> 5: (b7) r0 = 0
> 6: R0_w=inv0 R1=ctx(id=0 ref_obj_id=0,off=0,imm=0) R3_w=inv32 R10=fp0,call_-1
> 6: (95) exit
> processed 7 insns (limit 131072), stack depth 0
> FAIL
> Test   1: shift ... Failed to find match 1: R1=ctx(id=0,off=0,imm=0)

New dump has ref_obj_id=0, so maybe the test needs to be updated.


> func#0 @0
> ...
> processed 6 insns (limit 131072), stack depth 0
> FAIL
> ...
> processed 22 insns (limit 131072), stack depth 0
> FAIL
> Results: 0 pass 12 fail
> not ok 1..7 selftests: bpf: test_align [FAIL]
> selftests: bpf_test_align [FAIL]
>
> Test results comparison,
> https://qa-reports.linaro.org/lkft/linux-next-oe/tests/kselftest/bpf_test_align
>
> Test complete log (  and you might notice large number of bpf test failure)
> https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190318/testrun/644906/log
>
> Good linux -next tag: next-20190306
> Bad linux -next tag: next-20190318
> git branch     master
> git commit    b9998194591467dc562c23ecefb63af4eff7530b
> git describe  next-20190318
> git repo
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>
> Best regards
> Naresh Kamboju