netdev - selftests: bpf: test_align Test 4 unknown shift Failed to find match 7 R0=pkt(id=0,off=8,r=8,imm=0)

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Message-ID: <CA+G9fYs=JNPe7=xjrWfCugGs4v1s2xjHTjETBJh7LvxZ1Qojww@mail.gmail.com>
Date:   Thu, 20 Jun 2019 10:55:56 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Netdev <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        bpf@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>, kafai@...com,
        Yonghong Song <yhs@...com>
Subject: selftests: bpf: test_align Test 4 unknown shift Failed to find match
 7 R0=pkt(id=0,off=8,r=8,imm=0)

selftests: bpf: test_align failed running Linux -next kernel
5.2.0-rc5-next-20190619.

Here is the log from x86_64,

# selftests bpf test_align
bpf: test_align_ #
# Test   0 mov ... PASS
0: mov_... #
# Test   1 shift ... PASS
1: shift_... #
# Test   2 addsub ... PASS
2: addsub_... #
# Test   3 mul ... PASS
3: mul_... #
# Test   4 unknown shift ... Failed to find match 7 R0=pkt(id=0,off=8,r=8,imm=0)
4: unknown_shift #
# func#0 @0
@0: _ #
# 0 R1=ctx(id=0,off=0,imm=0) R10=fp0
R1=ctx(id=0,off=0,imm=0): R10=fp0_ #
# 0 (61) r2 = *(u32 *)(r1 +76)
(61): r2_= #
# 1 R1=ctx(id=0,off=0,imm=0) R2_w=pkt(id=0,off=0,r=0,imm=0) R10=fp0
R1=ctx(id=0,off=0,imm=0): R2_w=pkt(id=0,off=0,r=0,imm=0)_R10=fp0 #
# 1 (61) r3 = *(u32 *)(r1 +80)
(61): r3_= #
# 2 R1=ctx(id=0,off=0,imm=0) R2_w=pkt(id=0,off=0,r=0,imm=0)
R3_w=pkt_end(id=0,off=0,imm=0) R10=fp0
R1=ctx(id=0,off=0,imm=0):
R2_w=pkt(id=0,off=0,r=0,imm=0)_R3_w=pkt_end(id=0,off=0,imm=0) #
# 2 (bf) r0 = r2
(bf): r0_= #
...
# processed 22 insns (limit 1000000) max_states_per_insn 0
total_states 1 peak_states 1 mark_read 1
22: insns_(limit #
# FAIL
: _ #
# Results 6 pass 6 fail
6: pass_6 #
[FAIL] 7 selftests bpf test_align
selftests: bpf_test_align [FAIL]

Full test log,
https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190619/testrun/781777/log

Test results comparison,
https://qa-reports.linaro.org/lkft/linux-next-oe/tests/kselftest/bpf_test_align

Good linux -next tag: next-20190618
Bad linux -next tag: next-20190619
git branch     master
git commit    c0e4c41afeef66d21dc5704f614624cecac806ac
git describe  next-20190618
git repo
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

Best regards
Naresh Kamboju