9f:mon> di c008000013566000 1000
c008000013566000  7fe00008      trap
 ...
c008000013566eb8  60000000      nop
 ...
c008000013566ec0  7c0802a6      mflr    r0
c008000013566ec4  f8010010      std     r0,16(r1)
c008000013566ec8  f821ffa1      stdu    r1,-96(r1)
c008000013566ecc  3d80c000      lis     r12,-16384
c008000013566ed0  798c07c6      rldicr  r12,r12,32,31
c008000013566ed4  658c0036      oris    r12,r12,54
c008000013566ed8  618c51e0      ori     r12,r12,20960
c008000013566edc  7d8903a6      mtctr   r12
c008000013566ee0  4e800421      bctrl
c008000013566ee4  7c681b78      mr      r8,r3
c008000013566ee8  38210060      addi    r1,r1,96
c008000013566eec  e8010010      ld      r0,16(r1)
c008000013566ef0  7c0803a6      mtlr    r0
c008000013566ef4  7d034378      mr      r3,r8
c008000013566ef8  4e800020      blr
c008000013566efc  7fe00008      trap
 ...
9f:mon> r
R00 = c0000000000173d8   R16 = c000007fe13e8cb0
R01 = c0000040074efda0   R17 = c000007f8f6a0000
R02 = c0000000022d9900   R18 = c000007f8f6a0080
R03 = c0000040074efbd8   R19 = c000007f8f6a0080
R04 = 0000000000200000   R20 = c0000000012ff767
R05 = 0000000000030000   R21 = c000007f8f6a0080
R06 = 0000000000020000   R22 = c00000000136cc78
R07 = 0000000000517782   R23 = 0000000000000001
R08 = 0000001ebf7e3a55   R24 = 000000000000009f
R09 = 0000000000000000   R25 = 0000000000000e60
R10 = 0000000000000001   R26 = 0000000000000900
R11 = 0000000000000f8e   R27 = 0000000000000500
R12 = 0000000000004400   R28 = 0000000000000a00
R13 = c000007fff6f4f80   R29 = 0000000000000f00
R14 = 0000000000000000   R30 = 0000000000000002
R15 = c0000000012f6020   R31 = 0000000000000003
pc  = c000000000017038 replay_soft_interrupts+0x68/0x2e0
cfar= 0000000000000000
lr  = c0000000000173d8 arch_local_irq_restore+0x128/0x160
msr = 9000000000001033   cr  = 24004428
ctr = c000000000042468   xer = 0000000020000000   trap =  500
9f:mon> c0
[link register   ] c000000000f36d4c __bpf_prog_run_save_cb+0x5c/0x190
[c000003ffffa3780] c000000000fdf76c __ip_finish_output+0x8c/0x140 (unreliable)
[c000003ffffa37f0] c000000000f36f2c run_bpf_filter+0xac/0x200
[c000003ffffa3850] c000000000f37104 reuseport_select_sock+0x84/0x170
[c000003ffffa3890] c00000000112c1f8 inet6_lhash2_lookup+0x1c8/0x200
[c000003ffffa3910] c00000000112c48c inet6_lookup_listener+0x25c/0x280
[c000003ffffa3a00] c000000001105e58 tcp_v6_rcv+0x7b8/0xf50
[c000003ffffa3b50] c0000000010b79c0 ip6_protocol_deliver_rcu+0x110/0x630
[c000003ffffa3bc0] c0000000010b803c ip6_input+0x10c/0x130
[c000003ffffa3c40] c0000000010b76c4 ipv6_rcv+0x194/0x1c0
[c000003ffffa3cc0] c000000000ef68f4 __netif_receive_skb_one_core+0x74/0xb0
[c000003ffffa3d10] c000000000ef6d68 process_backlog+0x138/0x280
[c000003ffffa3d80] c000000000ef7e00 napi_poll+0x100/0x3c0
[c000003ffffa3e10] c000000000ef81b4 net_rx_action+0xf4/0x2d0
[c000003ffffa3ea0] c0000000011815f0 __do_softirq+0x150/0x428
[c000003ffffa3f90] c00000000002caec call_do_softirq+0x14/0x24
[c000000008fcf630] c000000000017448 do_softirq_own_stack+0x38/0x50
[c000000008fcf650] c0000000001640a0 do_softirq+0xa0/0xb0
[c000000008fcf680] c0000000001641a8 __local_bh_enable_ip+0xf8/0x120
[c000000008fcf6a0] c0000000010b1a98 ip6_finish_output2+0x248/0x7c0
[c000000008fcf740] c0000000010b1410 ip6_xmit+0x370/0x7b0
[c000000008fcf860] c00000000110f7f4 inet6_csk_xmit+0xb4/0x130
[c000000008fcf900] c00000000100e910 __tcp_transmit_skb+0x440/0x9f0
[c000000008fcfa10] c00000000100f758 tcp_connect+0x2e8/0x390
[c000000008fcfae0] c0000000011023e4 tcp_v6_connect+0x5e4/0x7b0
[c000000008fcfbd0] c000000001042e10 __inet_stream_connect+0x130/0x3a0
[c000000008fcfc30] c0000000010430dc inet_stream_connect+0x5c/0x90
[c000000008fcfc70] c000000000eb8e58 __sys_connect_file+0xa8/0xe0
[c000000008fcfcb0] c000000000eb8f74 __sys_connect+0xe4/0x140
[c000000008fcfd90] c000000000eb8ff8 sys_connect+0x28/0x40
[c000000008fcfdb0] c000000000036fe4 system_call_exception+0xf4/0x200
[c000000008fcfe10] c00000000000d860 system_call_common+0xf0/0x27c
--- Exception: c00 (System Call) at 00007cf993a78388
SP (7ffff12cb970) is in userspace
0:mon> r
R00 = c000000000f36f2c   R16 = 000000000000ada3
R01 = c000003ffffa3780   R17 = 000000000000000a
R02 = c0000000022d9900   R18 = 0000000000000001
R03 = c000000037c930e0   R19 = 0000000000000001
R04 = c008000013110038   R20 = c0000040213f4d48
R05 = c008000013110000   R21 = 0000000000000000
R06 = c000000037c930e0   R22 = 00000000000022b9
R07 = 0000000000000001   R23 = 0000000000000001
R08 = 0000000000000001   R24 = 000000000000ada3
R09 = 0000000000000000   R25 = c008000013110000
R10 = c00000011c2edf00   R26 = 0000000000000000
R11 = 0000000000000000   R27 = 00000000000000a0
R12 = c008000013566eb8   R28 = c000000037c930e0
R13 = c000000002590000   R29 = 0000000000000028
R14 = c0000000021fa500   R30 = 0000000000000028
R15 = 00000000000022b9   R31 = c008000013110000
pc  = c008000013566eb8
cfar= c000000000f36d48 __bpf_prog_run_save_cb+0x58/0x190
lr  = c000000000f36d4c __bpf_prog_run_save_cb+0x5c/0x190
msr = 9000000000029033   cr  = 28002882
ctr = c008000013566eb8   xer = 0000000020000000   trap =  700
0:mon> di c008000013566000 1000
c008000013566000  7fe00008      trap
 ...
0:mon> di c008000013560000 10000
c008000013560000  00000001      .long 0x1
c008000013560004  7fe00008      trap
 ...
c008000013562728  60000000      nop
 ...
c008000013562730  7c0802a6      mflr    r0
c008000013562734  f8010010      std     r0,16(r1)
c008000013562738  f821ffa1      stdu    r1,-96(r1)
c00800001356273c  3d80c000      lis     r12,-16384
c008000013562740  798c07c6      rldicr  r12,r12,32,31
c008000013562744  658c0036      oris    r12,r12,54
c008000013562748  618c51e0      ori     r12,r12,20960
c00800001356274c  7d8903a6      mtctr   r12
c008000013562750  4e800421      bctrl
c008000013562754  7c681b78      mr      r8,r3
c008000013562758  38210060      addi    r1,r1,96
c00800001356275c  e8010010      ld      r0,16(r1)
c008000013562760  7c0803a6      mtlr    r0
c008000013562764  7d034378      mr      r3,r8
c008000013562768  4e800020      blr
c00800001356276c  7fe00008      trap
 ...
0:mon>

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https://bugs.launchpad.net/bugs/1927076

Title:
  IPv6 TCP in reuseport_bpf_cpu from ubuntu_kernel_selftests/net crash
  P8 node entei on 5.8 kernel (Oops: Exception in kernel mode, sig: 4
  [#1])

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